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Study on the Migration Mechanism of Typical Characteristic Pollutants in Coking Enterprises
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作者 Jun ZHOU Yan WANG +4 位作者 Zhi CHEN Zhiqiang GONG Fan LI Ruihai DONG Ce ZHANG 《Meteorological and Environmental Research》 CAS 2022年第3期86-90,共5页
Groundwater pollution in north China is serious, which is mostly caused by complex factors. Aiming at the problems such as the unknown reasons for the differences in the migration characteristics of typical characteri... Groundwater pollution in north China is serious, which is mostly caused by complex factors. Aiming at the problems such as the unknown reasons for the differences in the migration characteristics of typical characteristic pollutants in the same medium and the unknown migration rules of complex pollutants in soil and groundwater, this paper selected a single sample and a mixed sample of typical characteristic pollutants in coking enterprises to carry out the static adsorption test. The results showed that the distribution coefficients of benzene series and aromatic hydrocarbon pollutants in soil-water were K_(d)benzene >K_(d)toluene >K_(d)ethylbenzene >K_(d)pyrene >K_(d)anthracene >K_(d)naphthene, and the distribution coefficients of ammonia nitrogen, phenols and cyanogen were K_(d)ammonia nitrogen >K_(d)phenols >K_(d)cyanogen. The overall distribution coefficient of benzene series was higher than that of PAHs, and it was easier to be adsorbed by silty loam. Different carbon and hydrogen mass and even electron distribution of typical characteristic pollutants led to differences in the migration characteristics of benzene and aromatic pollutants. The more carbon and hydrogen there were, the more even the electron distribution was, and the more difficult it was to migrate in the soil. Among the same kind of pollutants, the migration of complex pollutants was weaker than that of single pollutants. The research could provide the parameter basis for establishing the solute transport model of groundwater and the design basis for developing the related risk control and pollution prevention strategies. 展开更多
关键词 Coking enterprises characteristic pollutants Migration law Distribution coefficient
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Test Research on the Characteristics of Pollution Boundary Layer in the River Outlet Area of Grand Liao River 被引量:1
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作者 张云海 杨洪斌 邹旭东 《Meteorological and Environmental Research》 CAS 2010年第6期57-61,共5页
By using the meteorological data in the pollution boundary layer which was observed in two ground observation sites:coast and land in the river outlet area of Grand Liao River during January-February in 2007,the daily... By using the meteorological data in the pollution boundary layer which was observed in two ground observation sites:coast and land in the river outlet area of Grand Liao River during January-February in 2007,the daily change characteristics of pollute boundary layer in winter in the area were discussed. The results showed that the pollute boundary layer in the river outlet area of Grand Liao River was affected by the sea and land. In the certain weather condition,maybe the sea-land breeze appeared in the low altitude which was below 200 m in the coastal zone. The stability change in the different height in the coastal zone was more stable than in the land zone,and the wind field change in the area was mainly in 300 m low altitude. At night,the temperature inversion often appears in the area,and the thickness of temperature inversion layer is stably during 200-300 m. The thermal internal boundary layer penetrated deeply into the land about 10 km,and the height could reach 800 m. The atmospheric diffusion ability in the coastal area was weaker and stronger in the land area. 展开更多
关键词 River outlet of Liao River Pollution characteristics Boundary layer Atmospheric diffusion Test research China
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Pollution characteristics of the rivers in suburban Shanghai 被引量:7
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作者 YAOChunxia CHENZhenlou XUShiyuan LILing WANGLi LINShanshan 《Journal of Geographical Sciences》 SCIE CSCD 2005年第1期29-36,共8页
Forty middle and small rivers in three towns of Fengjing, Songjiang and Zhujiajiao of suburban Shanghai were chosen as sampling sites for water quality research. Measurement results of DO, CODCr, TP, TN and so on show... Forty middle and small rivers in three towns of Fengjing, Songjiang and Zhujiajiao of suburban Shanghai were chosen as sampling sites for water quality research. Measurement results of DO, CODCr, TP, TN and so on show that the rivers are under heavy eutropic conditions, which are several times greater than the critical values of the worst level (Type V) of water. Water pollution situation has different temporal and spatial characteristics. Non-point pollution, such as village domestic sewage, farmland runoff, livestock feces, has become the primary source of pollution of the middle and small rivers in suburban Shanghai. 展开更多
关键词 suburban Shanghai water quality pollution characteristics
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Pollution characteristics of the recent sediments in the Hangzhou section of the Grand Canal,China 被引量:3
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作者 CHENYing-xu LIUHe +2 位作者 ZHUGuang-wei CHENHua-lin TIANGuang-min 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2004年第1期34-39,共6页
Spatial distribution of heavy metals, arsenic and organic matter in recent sediments in the Hangzhou section of the Grand Canal and their relationships were analyzed. The results showed that the concentrations of heav... Spatial distribution of heavy metals, arsenic and organic matter in recent sediments in the Hangzhou section of the Grand Canal and their relationships were analyzed. The results showed that the concentrations of heavy metals and organic matters varied widely along the canal, and the average geological accumulation factors decreased in the following orders: organic carbon(2.6), zinc(2.1), cadmium(2.0), copper(1.5), lead(1.1), nitrogen(0.9), mercury (0.8), phosphorus(0.4), arsenic(0.2) and chromium(0). Content of heavy metals and organic carbon in the top 10 cm layer were lower than that of lower layers, except for mercury and organic carbon in the S9 section. Contents of organic carbon in the top 50 cm layer of the mud sediments are significantly higher than those underneath. In the bottom mud layer, there is a concentration peak of the pollutants. In the mud sediments of the canal, cadmium mainly occurred in the Fe and Mn oxide fraction, copper in the organic fraction, lead in the Fe and Mn oxide fraction, and zinc in the carbonate and the Fe and Mn oxide fraction. 展开更多
关键词 SEDIMENT pollution characteristics Grand Canal geological accumulation factor fraction of heavy metals
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Analysis on the Pollution Characteristics of Surface Runoff in Zhenjiang City 被引量:5
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作者 WAN You-ling,ZHANG Bo,WU Chun-du School of Environment,Jiangsu University,Zhenjiang 212013,China 《Meteorological and Environmental Research》 CAS 2011年第5期76-78,共3页
[Objective] The aim was to analyze the pollution characteristics of surface runoff in Zhenjiang City.[Method] On July 4 and August 16,2010,surface runoff samples were collected in different rainfall durations in Zhenj... [Objective] The aim was to analyze the pollution characteristics of surface runoff in Zhenjiang City.[Method] On July 4 and August 16,2010,surface runoff samples were collected in different rainfall durations in Zhenjiang City,and the variation characteristics of suspended substance (SS),chemical oxygen demand (CODCr),ammonia nitrogen (NH3-N) and total phosphorus (TP) in surface runoff were analyzed.[Result] With the increase of rainfall duration,SS concentration in surface runoff of Zhenjiang City on July 4 and August 16,2010 went up firstly and then went down,with the maximum concentration of 1 240 and 160mg/L,respectively,and the decreasing rang of SS concentration in the late stage of rainfall on July 4 was obviously greater than that of August 16 due to stronger rainfall on July 4.The general variation of CODCr was similar to that of SS concentration,and the change range of CODCr on July 4 (32-212mg/L) was larger than that of August 16 (13-53mg/L).In addition,the variation trends of NH3-N and TP concentration were similar,namely they increased firstly and then reduced rapidly,and the decreasing range of NH3-N and TP concentration was greater than that of SS concentration in the late stage of rainfall.[Conclusion] The research results could provide references for the study on water quality variation characteristics and treatment of surface runoff. 展开更多
关键词 Surface runoff Pollution characteristic Zhenjiang China
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Pollutant mixing and transport process via diverse transverse release positions in a multi-anabranch river with three braid bars 被引量:4
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作者 Zu-lin HUA Wei JI +1 位作者 Ning-ning SHAN Wei WU 《Water Science and Engineering》 EI CAS CSCD 2013年第3期250-261,共12页
A multi-anabranch river with three braid bars is a typical river pattern in nature, but no studies have been conducted to describe mixing characteristics of pollutants in the river. In this study, a physical model of ... A multi-anabranch river with three braid bars is a typical river pattern in nature, but no studies have been conducted to describe mixing characteristics of pollutants in the river. In this study, a physical model of a typical multi-anabranch river with three braid bars was established to explore the pollutant mixing characteristics in different branches. The multi-anabranch reach was separated into seven branches, B1, B2, B3, B4, B5, B6, and BT, by three braid bars. Five tracer release positions located 2.9 m upstream from the inlet section of the multi-anabranch reach were adopted, and the distances from the five positions to the left bank of the upstream main channel were 1/6B, 1/3B, 1/2B, 2/3B, and 5/6B (B is the width of the upstream main channel), respectively. The longitudinal velocities and pollutant concentrations in the seven branches were measured. The planar flow field and mixing characteristics of pollutants from the bottom to the surface in the multi-anabranch river were obtained and analyzed. The results show that the pollutant release positions are the main influencing factors in the pollutant transport process, and the diversion points and pollutant release positions jointly influence the percentage ratios of the pollutant fluxes in branches B 1, B2, and B3 to the pollutant flux in the upstream main channel. 展开更多
关键词 multi-anabranch river braid bar pollutant mixing characteristic pollutanttransport process
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Experimental Study on the Effect of Humidification on the Pollution Characteristics of Particulate Matter in the Office 被引量:1
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作者 Yuefen Gao Shanshan Nan +1 位作者 Guozhong Zheng Tingting Gao 《Journal of Environmental Protection》 2016年第12期1791-1801,共12页
Indoor air quality has a direct impact on human health. Indoor air quality has aroused great concern. This experimental study compares the effects of different water humidification on the indoor particulate pollution ... Indoor air quality has a direct impact on human health. Indoor air quality has aroused great concern. This experimental study compares the effects of different water humidification on the indoor particulate pollution characteristics, and analyzes the mass concentration and the particulate number concentration distribution of different sizes of particulates with time under each condition of the purified water humidification, the tap water humidification and the cold boiled water humidification in the office. The results show that under the three kinds of wetting conditions, the concentration of the fine particulates is higher. More minerals are contained in the tap water and the cold boiled water, so the two kinds of humidification have more significant impact on indoor particulate matter. But the purified water humidification has nearly no significant effect on it. The calcium and magnesium ionic compounds are partly removed after the water boiled, so the cold boiled water humidification has less impact on the indoor particulate matter than the tap water humidification. The mass concentration and particulate number concentration of the particle may also be affected due to the frequency of ultrasonic vibration. 展开更多
关键词 HUMIDIFICATION Particulate Matter Pollution characteristics Particulate Mass Concentration Particulate Number Concentration
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Fine Particulate Pollution Characteristics in Jinan City
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作者 Zhang Guiqin Wang Zhaojun +1 位作者 Liu Yutang Wilhelm Hoeflinger 《Chinese Journal of Population,Resources and Environment》 2010年第4期61-64,共4页
The characteristics of fine particulate pollution(PM10 and PM2.5) were measured at urban and suburban sites in Jinan during the 2008-2009 heating and non-heating seasons.The results showed that PM10 and PM2.5 pollutio... The characteristics of fine particulate pollution(PM10 and PM2.5) were measured at urban and suburban sites in Jinan during the 2008-2009 heating and non-heating seasons.The results showed that PM10 and PM2.5 pollution was quite serious,and PM mass concentration was higher during the heating season than the non-heating season.PM was the highest in the chemical factory and lowest in the development zone.The mass concentrations of PM10 and PM2.5 were linearly related,and the mass concentration ratio of PM2.5/PM10 was up to 0.59 in urban areas.PM pollution in Jinan was related to local meteorological factors:PM2.5 mass concentration and humidity were positively correlated,and PM2.5 mass concentration was negatively correlated with both click on the temperature and wind speed,although wind speed varied more. 展开更多
关键词 Fine Particles(PM2.5 and PM10) Pollution characteristics Spatial and temporal variations Meteorological factors.
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Characteristics and Meteorological Conditions of Ozone Pollution in Shantou City
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作者 Juan LI Chengliu LI +6 位作者 Lianghong XIAO Yan GUO Yiyao HUANG Shuchi CHEN Miao CHEN Wenshu LI Yufeng ZHANG 《Meteorological and Environmental Research》 CAS 2021年第1期19-25,共7页
Based on routine monitoring data of air quality and meteorological data in Shantou City during 2015-2019,temporal-spatial variation characteristics of O 3 pollution and its correlation with meteorological conditions i... Based on routine monitoring data of air quality and meteorological data in Shantou City during 2015-2019,temporal-spatial variation characteristics of O 3 pollution and its correlation with meteorological conditions in Shantou City were explored.The research results showed that O 3 pollution days in Shantou City showed an increasing trend year by year,and O 3 pollution had far-distance transportation and the development trend from offshore Nan ao Island to urban district.In spring and autumn,there was serious O 3 pollution,and it was the most prominent in October.Its diurnal variation in O 3 pollution days was mainly wide-peak type in the afternoon,showing as that O 3 concentration declined slowly after the noon.In O 3 pollution days,higher O 3 concentration was easy to appear at night,causing that O 3 peak in the second day was uplifted,and there was continuous O 3 pollution.Combining backward trajectory analysis chart,it was found that Shantou was mainly affected by coastal transport of northerly polluted air mass,and it was transported into Shantou City from the east to the northeast.O 3 from long-distance transmission superimposed with locally generated O 3,which commonly pushed up the level of O 3 concentration.The weather of O 3 pollution in Shantou City had the characteristics of high temperature and low humidity.There was 25-30℃of temperature interval and 46%-60%of relative humidity interval,and it was accompanied by grade-2 easterly wind. 展开更多
关键词 Shantou City OZONE Pollution characteristics Meteorological conditions
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Analysis of VOCs Pollution Characteristics and Ozone Formation Potential Based on a Mobile Monitoring System in Beibei District
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作者 Xianshuang YANG 《Meteorological and Environmental Research》 CAS 2022年第6期31-34,41,共5页
Based on a mobile monitoring system,101 volatile organic compounds(VOCs)in ambient air near a national control station in an industrial park were monitored during February 15-21 in 2022,and the pollution characteristi... Based on a mobile monitoring system,101 volatile organic compounds(VOCs)in ambient air near a national control station in an industrial park were monitored during February 15-21 in 2022,and the pollution characteristics and ozone formation potential(OFP)of VOCs were analyzed.The results show that among the top 10 VOCs with higher mass concentration,there were 5 VOCs appearing in each day from February 15 to 21,including styrene,benzene,toluene,undecane and n-decane,which indicates that the sources of VOCs emission at the monitoring point were relatively stable.During the monitoring period,aromatic hydrocarbons contributed the most to the ozone formation potential of VOCs,accounting for above 70%,followed by alkanes and oxygen-containing compounds.The total OFP of aromatic hydrocarbons,alkanes and oxygen-containing compounds accounted for more than 90%,so they became the active components with the greatest influence on ozone formation.Aromatic hydrocarbons such as 1,2,4-trimethylbenzene,1,3,5-trimethylbenzene and m/p-dimethylbenzene,oxygen-containing organic compounds such as ethanol and acetone,and alkanes such as n-nonane and butane had high OFP,so they had a great effect on ozone formation. 展开更多
关键词 VOCS Pollution characteristics OFP
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Pollution characteristics and health risk assessment of polycyclic aromatic hydrocarbons and nitrated polycyclic aromatic hydrocarbons during heating season in Beijing 被引量:4
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作者 Xurong Bai Jie Wei +5 位作者 Yanqin Ren Rui Gao Fahe Chai Hong Li Fei Xu Yuxue Kong 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2023年第1期169-182,共14页
Polycyclic aromatic hydrocarbons(PAHs)and their nitrated derivatives(NPAHs)attract continuous attention due to their outstanding carcinogenicity and mutagenicity.In order to investigate the diurnal variations,sources,... Polycyclic aromatic hydrocarbons(PAHs)and their nitrated derivatives(NPAHs)attract continuous attention due to their outstanding carcinogenicity and mutagenicity.In order to investigate the diurnal variations,sources,formation mechanism,and health risk assessment of them in heating season,particulate matter(PM)were collected in Beijing urban area from December 26,2017 to January 17,2018.PAHs and NPAHs in PM were quantitatively analyzed via gas chromatography-mass spectrometry(GC-MS).Average daily concentrations of PAHs and NPAHs were(78±54)ng/m^(3)and(783±684)pg/m^(3),respectively.The concentrations of them were significantly higher at nighttime than at daytime,and NPAHs concentrations were 1-2 orders of magnitude lower than PAHs concentrations.In the heating season,the dominant species of PAHs include benzo[b]fluoranthene,fluoranthene,pyrene,and chrysene,while 9-nitroanthracene,2+3-nitrofluoranthene,and 2-nitropyrene were dominant species for NPAHs.NPAHs were found to have a single peak during heating and to be primarily distributed in the 0.4-0.7μm particle size.Primary emissions such as biomass burning,coal combustion,and traffic emissions were the major sources of PAHs.NPAHs were produced by the primary source of vehicle emissions and the secondary reaction triggered by OH radicals,as well as biomass burning during daytime.According to the health risk assessment,the total carcinogenic risk was higher in adults than in children.While upon oral ingestion,the carcinogenic risk in children was higher than that of adults,but the risk of adults was higher than children through skin contact and respiratory inhalation. 展开更多
关键词 Heating season Polycyclic aromatic hydrocarbons Nitrated polycyclic aromatic hydrocarbons Pollution characteristics Source Health risk assessment
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Characteristics of pollutants behavior in a stormwater constructed wetland during dry days
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作者 Jianghua YU Kisoo PARK Youngchul KIM 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2012年第5期649-657,共9页
A stormwater wetland treating non-point source pollution (NPS) from a 64 ha agricultural watershed was monitored over a period of five months. The results indicated that pH and dissolved oxygen (DO) were increased... A stormwater wetland treating non-point source pollution (NPS) from a 64 ha agricultural watershed was monitored over a period of five months. The results indicated that pH and dissolved oxygen (DO) were increased in the wetland due highest total suspended solids to the algal growth. The (TSS) concentration was observed in the aeration pond due to the resuspension of solids, decreased in the wetland. The respective decreases in total nitrogen (TN) and total kjeldahl nitrogen (TKN) were 15.9% and 28.7% on passing through the wetland. The nitrate and ammonia were increased by 45.4% and decreased by 79.9%, respectively. These variations provided strong evidence for the existence of nitrification. The total phosphorus (TP) and phosphate had respective reductions of 52.3% and 58.2% over the wetland. The total chemical oxygen demand (TCOD) and soluble chemical oxygen demand (SCOD) were also decreased. Generally, the TN, TP and phosphate removal etticiencies were positive. These positive removal efficiencies were mainly due to microbial activities, uptake by plants, and chemical precipitation at high pH. Negative removal efficiencies can be caused by continuous rainfall activities, with short antecedent dry days (ADDs) and unstable hydraulic conditions, some other biogeochemical transformations and algal growth also being important parameters. 展开更多
关键词 constructed stormwater wetland dry days nitrification and denitrification pollutants characteristic
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Analysis of Summertime Typical Pollution in Pearl River Delta Region——Numerical Simulation of Meteorological Field
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作者 Zhang Xiaochen Liu Yiming +3 位作者 Deng Xuejiao Chen Pakwai Feng Yerong Fan Qi 《Meteorological and Environmental Research》 CAS 2014年第4期9-18,共10页
Based on meteorological field and air quality observation data, air pollution process over Pearl River Delta (PRD) in August of 2012 was analyzed. There were five notable pollution processes in this month, in which ... Based on meteorological field and air quality observation data, air pollution process over Pearl River Delta (PRD) in August of 2012 was analyzed. There were five notable pollution processes in this month, in which four pollution processes were related to typhoon. By using meso-scale meteorological model WRF, meteorological characteristics of two pollution processes induced by tropical cyclone were contrasted and analyzed. Results showed that O9 and PMTo concentrations significantly increased in PRD region during Typhoon Haikui period (7 -8 August), and other pollutant concentrations were also high. However, 03 and PM10 concentrations did not significantly increase during Typhoon Kai-Tak period (16 -17 August). This kind of concentration difference between two processes was related to typhoon pathway, wind direction and velocity, atmospheric boundary layer height, vertical transport and horizontal divergence field. 展开更多
关键词 PRD region Pollution characteristics Tropical cyclone WRF model China
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Analysis on the Current Situation, Impact and Source of Atmospheric Ozone Pollution in China
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作者 Hao CHEN Wanyu HOU +1 位作者 Weijun LI Qiao WANG 《Meteorological and Environmental Research》 CAS 2020年第6期13-16,共4页
With the gradual improvement of PM 2.5 pollution in China,the problem of ozone pollution is becoming more and more serious.In recent years,ozone has become the only one of the six major air pollutants increasing year ... With the gradual improvement of PM 2.5 pollution in China,the problem of ozone pollution is becoming more and more serious.In recent years,ozone has become the only one of the six major air pollutants increasing year on year in China,and the primary pollutant of air pollution in many cities of China in summer.In this paper,pollution characteristics of ozone and its relationship with meteorological conditions in China s provincial capitals and some economically developed cities(27 cities in total),and temporal-spatial distribution rules of ozone in China were analyzed,and influence and main source of ozone in China were summarized.The results were as below:daily change of ozone concentration showed as single-peak type,and the maximum generally appeared at 15:00-16:00,while the minimum generally occurred at 07:00-08:00.Seasonal change of ozone concentration mainly showed as single-peak type.In summer,ozone concentration was the highest,followed by spring and autumn,and its concentration in winter was the lowest.The influence of meteorological factors on ozone showed as that there was significantly positive correlation between ozone and temperature,radiation quantity,and significantly negative correlation between ozone and humidity,NOx.Ozone near surface will have adverse effects on biosphere,climate and ecological environment.The source of ozone can be divided into two kinds:man-made and natural,and the most important source of near-surface ozone is man-made. 展开更多
关键词 OZONE Pollution characteristics Meteorological factors
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Atmospheric carbonyls in a heavy ozone pollution episode at a metropolis in Southwest China:Characteristics,health risk assessment,sources analysis 被引量:3
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作者 Jiemeng Bao Hong Li +6 位作者 Zhenhai Wu Xin Zhang Hao Zhang Yunfeng Li Jun Qian Junhui Chen Liqun Deng 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2022年第3期40-54,共15页
Ambient carbonyls were continuously observed in the field during a heavy ozone pollution episode in Chengdu, China from August 4 to August 19, 2019, and the pollution characteristics, atmospheric photochemical reactiv... Ambient carbonyls were continuously observed in the field during a heavy ozone pollution episode in Chengdu, China from August 4 to August 19, 2019, and the pollution characteristics, atmospheric photochemical reactivity, human health risk, and sources of carbonyls were analyzed. Fifteen carbonyls were quantified with average total mixing ratios of 20.38 ppbv Formaldehyde(9.86 ppbv), acetone(4.41 ppbv), and acetaldehyde(3.57 ppbv) were the three most abundant carbonyls. During the heavy ozone pollution episode, the concentration of carbonyls was found to be higher on pollution days than on the clean days, and relatively higher in the daytime, especially at noon on the pollution days. This was influenced by the intensity of photochemical reactions and precipitation. The “weekend effect” with the concentration of carbonyls was higher on the weekends than on the weekdays was pointed out. Formaldehyde, acetaldehyde and hexaldehyde were the dominant oxidative species during the observation. The carcinogenic and non-carcinogenic risk values of formaldehyde and acetaldehyde were higher on pollution days than on clean days, and these values were higher compared with those of other cities in China and abroad. Long-term exposure to these compounds should therefore be avoided. Diagnostic ratios and correlation analysis together with backward trajectory analysis showed that primary emission and secondary formation accounted 66%-76% and 24%–34% of carbonyls in Chengdu, respectively, with primary emission being the main sources of carbonyls, and carbonyls from the surrounding cities and emission from natural sources also had a significant contribution to the carbonyls in Chengdu. 展开更多
关键词 CARBONYLS Pollution characteristics Atmospheric photochemical reactivity Source analysis Chengdu
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Characteristics of atmospheric particles and heavy metals in winter in Chang-Zhu-Tan city clusters, China 被引量:9
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作者 Kai Zhang Fahe Chai +4 位作者 Zilong Zheng Qing Yang Juansheng Li Jing Wang Yujie Zhang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2014年第1期147-153,共7页
To understand the pollution characteristics of atmospheric particles and heavy metals in winter in Chang-Zhu-Tan city clusters, China, total suspended particulate (TSP) and PMI0 samples were collected in cities of C... To understand the pollution characteristics of atmospheric particles and heavy metals in winter in Chang-Zhu-Tan city clusters, China, total suspended particulate (TSP) and PMI0 samples were collected in cities of Changsha, Zhuzhou and Xiangtan from December 2011 to January 2012, and heavy metals of Cd, Pb, Cr, and As were analyzed. It shows that the average TSP concentration in Changsha, Zhuzhou and Xiangtan were (183 ± 73), (201± 84) and (190 ±66) μg/m3 respectively, and the average PM10 were (171 ± 82), (178 ± 65) and (179 ± 55) μg/m3 respectively. The lowest TSP and PM10 concentrations occurred at the background Shaping site of Changsha. The average ratio of p(PM10)/p(TSP) was 91.9%, ranging from 81.3% to 98.9%. Concerning heavy metals, in TSP samples, the concentration of Cr, As, Cd and Pb were 28.8-56.5, 18.1-76.3, 3.9-26.1 and 148.0-460.9 ng/m3, respectively, while in PMI0 samples, were 16.4--42.1, 15.5-67.9, 3.3-22.2 and 127.9-389.3 ng/m3, respectively. The enrichment factor of Cd was the highest, followed by Pb and As, while that of Cr was the lowest. 展开更多
关键词 atmospheric particles pollution characteristics enrichment factors Chang-Zhu-Tan city clusters
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Analysis of rainfall runoff characteristics from a subtropical urban lawn catchment in South-east China 被引量:1
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作者 Jinliang HUANG Zhenshun TU +2 位作者 Pengfei DU Qingsheng LI Jie LIN 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2012年第4期531-539,共9页
Characteristics of rainfall runoff from a 3.26 hm^2 urban catchment with predominant land-use as lawn in Xiamen City, South-east China were investigated and analyzed. Water quality and quantity measurements of rainfal... Characteristics of rainfall runoff from a 3.26 hm^2 urban catchment with predominant land-use as lawn in Xiamen City, South-east China were investigated and analyzed. Water quality and quantity measurements of rainfall runoff were conducted for ten rainfall events over the period March, 2008 to April, 2009. The results indicated that chemical oxygen demand (COD) and total phosphorus (TP) were the major pollutants with event mean concentrations of 56.09 and 0.44mg.L^-1. From hydrograph and pollutograph analysis of two typical rainfall events, it was clear that the peak rainfall preceded the peak flowrate by about 15-20 min. Meanwhile, concentrations of major pollutants showed multiple peaks and these peaks usually preceded peak flowrate. There were no distinctive first-flush effects except for the rainfall events with the longest rainfall duration and largest runoff volume, which was verified by the fact that the first 30% runoff volume (FF30) carried 39.36% of the total suspended solids (TSS) load, 35.17% of the COD load, 28.13% of the TP load and 39.03% of the nitrate nitrogen load. Multivariate regression analysis further demonstrated that the total runoffvolume had a positive correlation with the FF30 of TSS and COD. 展开更多
关键词 rainfall runoff first flush pollution characteristics urban lawn catchment
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A preliminary study on pollution characteristics of surfactant substances in fine particles in the Beibu Gulf Region of China
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作者 Zhengzheng Zhang Hong Li +7 位作者 Hongyan Liu Yingchen Bai Jinjuan Li Guorui Zhi Yanting Yu Wenjun Li Hao Zhang Fan Meng 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2021年第4期363-372,共10页
The pollution characteristics of surfactant substances in fine particles(PM_(2.5))in spring were studied in the Beibu Gulf Region of China,68 samples of PM_(2.5)were collected at Weizhou Island in Beihai City from Mar... The pollution characteristics of surfactant substances in fine particles(PM_(2.5))in spring were studied in the Beibu Gulf Region of China,68 samples of PM_(2.5)were collected at Weizhou Island in Beihai City from March 12 to April 17,2015.The Anionic Surfactant Substances(ASS)and Cationic Surfactant Substances(CSS)in the samples were analyzed using Byethyl Violet Spectrophotometry and Disulfide Blue Spectrophotometry,respectively.Combined with the data from backward trajectory simulation,the effects of air pollutants from remote transport on the pollution characteristics of surfactant substances in PM_(2.5)in the Beibu Gulf Region were analyzed and discussed.The results showed that the daily mean concentrations of ASS and CSS in spring in the Beibu Gulf Region were 165.20 pmol/m^(3)and 8.05 pmol/m^(3),and the variation ranges were 23.21–452.55 pmol/m^(3)and 0.65–31.31 pmol/m^(3),accounting for 1.82‰±1.65‰and 0.12‰±0.11‰of the mass concentration of PM_(2.5),respectively.These concentrations were lower than those in comparable regions around the world.There was no clear correlation between the concentrations of ASS and CSS in PM_(2.5)and the mass concentrations of PM_(2.5).Tourism and air transport had a positive contribution on the concentrations of ASS.The concentration of surfactant substances in PM_(2.5)was significantly impacted by wind speed and wind direction.Atmospheric temperature,air pressure and precipitation had little effect on the concentrations of surfactant substances.Surfactant substances in PM_(2.5)significantly impacted visibility.Results also showed that the main sources of surfactant substances were from the southern China and Southeast Asia. 展开更多
关键词 Fine particles Surfactant substances Pollution characteristics Impact factors Beibu gulf region of China
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Size distribution and source of heavy metals in particulate matter on the lead and zinc smelting affected area 被引量:11
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作者 Kai Zhang Fahe Chai +4 位作者 Zilong Zheng Qing Yang Xuecai Zhong Khanneh Wadinga Fomba Guangzhu Zhou 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2018年第9期188-196,共9页
In order to understand the size distribution and the main kind of heavy metals in particulate matter on the lead and zinc smelting affected area, particulate matter (PM) and the source samples were collected in Zhuz... In order to understand the size distribution and the main kind of heavy metals in particulate matter on the lead and zinc smelting affected area, particulate matter (PM) and the source samples were collected in Zhuzhou, Hunan Province from December 2011 to January 2012 and the results were discussed and interpreted. Atmospheric particles were collected with different sizes by a cascade impactor. The concentrations of heavy metals in atmospheric particles of different sizes, collected from the air and from factories, were measured using an inductively coupled plasma mass spectrometry (ICP-MS). The results indicated that the average concentration of PM, chromium (Cr), arsenic (As), cadmium (Cd) and lead (Pb) in PM was 177.3 ± 33.2 μg/m^3, 37.3 ± 8.8 ng/m^3, 17.3 ± 8.1 ng/m^3, 4.8 ± 3.1 ng/m^3 and 141.6 ± 49.1 ng/m^3, respectively. The size distribution of PM displayed a bimodal distribution; the maximum PM size distribution was at 1.1-2.1 μm, followed by 9-10 μm. The size distribution of As, cd and Pb in PM was similar to the distribution of the PM mass, with peaks observed at the range of 1.1-2.1 μm and 9-10 μm ranges while for Cr, only a single-mode at 4.7-5.8 μm was observed. PM (64.7%, As (72.5%), cd (72.2%) and Pb (75.8%) were associated with the fine mode below 2.1 μm, respectively, while Cr (46.6%) was associated with the coarse mode. The size distribution characteristics, enrichment factor, correlation coefficient values, source information and the analysis of source samples showed that As, Cd and Pb in PM were the typical heavy metal in lead and zinc smelting affected areas, which originated mainly from lead and zinc smelting sources. 展开更多
关键词 Atmospheric particulate matter Size distribution Heavy metals Pollution characteristics Lead and zinc smelting
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Atmospheric isoprene and monoterpenes in a typical urban area of Beijing: Pollution characterization, chemical reactivity and source identification 被引量:4
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作者 Xi Cheng Hong Li +10 位作者 Yujie Zhang Yuping Li Weiqi Zhang Xuezhong Wang Fang Bi Hao Zhang Jian Gao Fahe Chai Xiaoxiu Lun Yizhen Chen Junyi Lv 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2018年第9期150-167,共18页
Continuous observation of isoprene, β-pinene and β-pinene was carried out in a typical urban area of Beijing from March 2014 to February 2015, using an AirmoVOC online analyzer. Based on the analysis of the ambient ... Continuous observation of isoprene, β-pinene and β-pinene was carried out in a typical urban area of Beijing from March 2014 to February 2015, using an AirmoVOC online analyzer. Based on the analysis of the ambient level and variation characteristics of isoprene, β-pinene and β- pinene, the chemical reactivity was studied, and their sources were identified. Results showed that the concentrations of isoprene, α-pinene and β-pinene in the urban area of Beijing were lower than those in richly vegetated areas; the concentrations of isoprene were at a moderate level compared with those of previous studies of Beijing. Concentrations of isoprene, α-pinene and β-pinene showed different seasonal, monthly, daily and diurnal variations, and all of the three species showed higher level at night than those in the daytime as a whole, the variations of isoprene, α-pinene and β-pinene mainly influenced by emission of sources, photochemical reaction, and meteorological parameters. Isoprene was the largest contributor to the total OFP values than β-pinene and β-pinene. α-Pinene was the largest contributor to the total SOAFP values than isoprene and β-pinene in autumn, while isoprene was the largest one in other seasons. Isoprene, α-pinene and β-pinene were derived mainly from biological sources; and α- pinene level were also affected by industrial sources. To reduce the concentrations of isoprene, α-pinene and β-pinene, it is necessary to scientifically select urban green plant species, and more strict control measures should be taken to reduce the emission of β-pinene from industrial sources, such as artificial flavors and resins synthesis processes. 展开更多
关键词 Ambient air ISOPRENE MONOTERPENES Pollution characteristics Emission sources BEIJING
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