期刊文献+
共找到53篇文章
< 1 2 3 >
每页显示 20 50 100
Production of National Power Industry Between January and March 2010
1
《Electricity》 2010年第2期54-,共1页
关键词 production of National Power industry Between January and March 2010 WIND
下载PDF
Path Dependent Historical Development at Turkish Automotive Industry
2
作者 SıtkıSelim Dolanay 《Journal of Sociology Study》 2022年第4期160-177,共18页
Turkey’s automotive industry has begun to occur at a much earlier date compared to other developing countries,through licensing agreements to establish automotive industrial facilities,by importing a kind of technolo... Turkey’s automotive industry has begun to occur at a much earlier date compared to other developing countries,through licensing agreements to establish automotive industrial facilities,by importing a kind of technology.Attempts have been made in order to produce the domestic automobile road providing sectoral developments could enter another technology pathway.Moreover,the inventor of a very early date in the Fordist production system,such as 1929 by Ford Motor Company with the license agreement,as if he could provide for setting up production facilities in Istanbul’s company,this bad experience has refrained for years from entering as a manufacturer Ford Motor Turkey market.Thus,while Turkey is an attractive market for car production,on the other hand,sufficient improvement over time in the production of trucks and other automotive products,such as buses has not been achieved.The 1929 experience seems to have been effective in terms of Turkey.Because,it was necessary to wait until 1971 for OYAK and TOFAŞto establish automobile assembly facility with license agreements.With the start of production of two automotive industry facilities,there has been a significant increase in sectoral production figures,but this increase trend has not been sufficiently supported by the government through the incentive system and in the late 1970s the production of the automotive industry has declined.For the first time in 1961,efforts were made to produce a completely domestic automobile,although the prototype of the revolutionary car was successfully produced,mass production could not be started.Subsequently,the production of the Anadol automobile for the second time was tried by means of technology transfer from multiple sources and the serial production of this automobile continued for a while.However,since fiber glass bodywork was used instead of hair bodywork and export opportunities could not be found,production was stopped completely in the end of 1980s.In the 1980s,automobile production continued in two assembly plants and product diversification was carried out to increase the production volume.In the 1990s,three new assembly facilities,Honda,Toyota and Hyundai,were established and the number of assembly production facilities in the country increased to five and technology loyalty based on technology imports continued.Until 2014,the automotive industry continued to consist of five automobile assembly plants and other automotive products assembly plants.In 2015,it was announced to the public that a new domestic car prototype was produced.It was announced that the project will start mass production in 2019.However,it was determined that the prototype would be re-manufactured at the end of 2019 by making changes in the project and that it would be possible to start mass production in 2022.Thus,it is understood that the efforts to start mass production since 2015 can be concluded in 2022,i.e.7 years after the first prototype was produced.It can 161produce prototypes in a short period of four months in Turkey in 1961,as evidenced by an indication of the dependency on a long time wasting which is not technology importation pathway,such as five years.How to break the path of devotion demonstrates that it is a difficult job.Path dependency is thought to result from the education system. 展开更多
关键词 automotive industry import of technology technology transfer domestic automobile automotive industry production path dependency education system
下载PDF
An application of data envelopment analysis to investigate the efficiency of lumber industry in northwestern Ontario,Canada 被引量:1
3
作者 Thakur Prasad Upadhyay Chander Shahi Mathew Leitch Reino Pulkki 《Journal of Forestry Research》 SCIE CAS CSCD 2012年第4期675-684,共10页
This study aims at exploring the technical efficiency of lum- ber industry in northwestern Ontario, Canada using data envelopment analysis (DEA). The DEA model analyzes relative technical efficiency of lumber mills ... This study aims at exploring the technical efficiency of lum- ber industry in northwestern Ontario, Canada using data envelopment analysis (DEA). The DEA model analyzes relative technical efficiency of lumber mills with disproportionate inputs and outputs by dividing the 10- year time series data, for inputs and outputs of 24 lumber mills, over two periods (1999-2003 and 2004-2008). Four inputs, namely, material (log volume), labour (man-hours), two types of energy (hog-fuel and electric- ity), and one output (lumber volume) are used in this study. The trend analysis shows an annual reduction of 10%, 13% and 13% for lumber output, log consumption (input) and number of employees, respectively, during the period 1999-2008. The results from DEA with two scenarios with energy inputs and without energy inputs, for the two periods are found to be mixed and interesting. While some mills have improved their performance in terms of best use of available scarce inputs in the second period, some have shown negative per cent change in efficiency. In the with energy input and the without energy input scenario, some of the mills show a reduction in efficiency in the second period from the first period, with the highest estimated reductions of-13.9% and -47.6%, respectively. A possible explanation for these negative performances of mills in the latter period is the decline in production in the second period compared to the first period, where these mills were not able to adjust their inputs (mostly labour) as proportional lay-offs might not have been possible. These results provide policy makers and industry stakeholders with an improved understanding of the trends of efficiency and employ- ment as well as reallocation opportunities of future inputs in order to increase benefits from this sector. 展开更多
关键词 allocative efficiency forest products industry MODELLING production inputs technical efficiency
下载PDF
Analysis of China's sporting products industry based on the SCP framework 被引量:1
4
作者 Li Jia Liu Yijie Zhao Zhipeng 《China Textile》 2016年第9期50-56,共7页
The SCP framework is a classical theory of industrial organization,which refers to the market structure,market conduct and market performance.This analysis is based on the SCP framework,choosing the current sporting p... The SCP framework is a classical theory of industrial organization,which refers to the market structure,market conduct and market performance.This analysis is based on the SCP framework,choosing the current sporting products industry as object.Study found that China's sporting products industry's geographical layout has a"strong in South and East,weak in North and West"regional development trend,the proportion of abovedesignated enterprises is relatively low,rate of market concentration is not high,product homogenization remain quite serious.With high-speed technological progress and rapid scientific and technological updates,in the future,the sporting products industry will be reorganized according to the subdivision industries,getting rid of homogenization of competition and meeting the needs of consumers in smart wearable,health monitoring and other aspects. 展开更多
关键词 The SCP framework theory of industrial organization sporting products industry
下载PDF
Discrepancies between targets and achievements in industrial forest production and export in Tanzania
5
作者 E.F.NZUNDA 《Forestry Studies in China》 CAS 2012年第3期210-215,共6页
It is important to revisit our plans and compare what was ideally targeted against what was actually achieved in implementation. In comparing the achievements with targets, strengths or weaknesses of established strat... It is important to revisit our plans and compare what was ideally targeted against what was actually achieved in implementation. In comparing the achievements with targets, strengths or weaknesses of established strategies can be accepted or corrections implemented since a plan also outlines some strategies for achieving the targets set. In this study, achievements in production and export of industrial forest products, i.e., sawn wood, plywood, chipboard and fibreboard, paper and paperboard and industrial round wood, are compared against targeted figures for 1996 for Tanzania. Discrepancies were obtained by subtracting targeted from achieved values and expressed both as absolute and relative differences in terms of the targeted values, with a negative sign for pro- duction where achievements were less than targets and a positive sign when achievements were higher than targets. Values achieved ranged from 4%-100% of the targeted values, depending on the product, and were only higher than the targeted value for industrial round wood. Possible causes of the discrepancies are inefficiency of parastatal companies, low private investment, sub-maximal in- dustrial operation and plant inefficiencies. Discrepancies could also result from unrealistic data used in planning due to difficulty in data availability and poor intra- and inter-sectoral coordination. The implications of these discrepancies are low contributions of the wood-based industry to the national economy, increased import substitution of wood-based products, increased socio-economic and environmental degradation and decreased integrity in planning and policy making. 展开更多
关键词 TARGETS ACHIEVEMENTS industrial forest production and export Tanzania
下载PDF
An Analysis of Development Trend of Food Industry in Three Northeastern Provinces of China
6
作者 Wenxin LIU Xiuli HE 《Asian Agricultural Research》 2018年第1期16-20,23,共6页
The food industry has developed into a leading industry in Northeast China.However,various economic indicators have shown a significant downward trend in recent years.Through the systematic analysis of the development... The food industry has developed into a leading industry in Northeast China.However,various economic indicators have shown a significant downward trend in recent years.Through the systematic analysis of the development trend of food industry in Northeast China in the past ten years,especially in 2014,it is found that in the context of stable and smooth operation of the food industry in China,the efficiency of the main processing industries declines in the three northeastern provinces of China,there is a simultaneous decline in the share of output value of the leading industries in the output value of manufacturing sector in three provinces,the collective and individual capital withdrawal is obvious in the paid-up capital,and there is a simultaneous decline in the industrial production and sales rate and the export delivery value.The food industry in Northeast China has plunged into the dilemma of development.Finally,this article puts forward some targeted recommendations from aspects of policy making,industrial agglomeration and enterprise cultivation. 展开更多
关键词 Food industry Agro-food processing industry Industrial production and sales rate Industrial agglomeration Northeast China
下载PDF
The Industrial Production of Water Dedicated to Absorption of Gases
7
作者 Ihar Yelkin Edward Reszke +1 位作者 Grzegorz Binkiewicz Grzegorz Schroeder 《Journal of Water Resource and Protection》 2021年第8期632-653,共22页
The paper presents a flow plasma reactor permitting modification of the properties of water/aqueous solutions by stochastic resonance amplification of vibrations of selected chemical species in water with electromagne... The paper presents a flow plasma reactor permitting modification of the properties of water/aqueous solutions by stochastic resonance amplification of vibrations of selected chemical species in water with electromagnetic noise generated during a plasma discharge. The main parameters characterizing the quality for super-pure water, tap water and water from the intake in Besko (Poland) before and after the process in the plasma reactor were presented for comparison. In addition, the <sup>17</sup>O NMR (the full width at half maximum) and electrospray ionization mass spectrometry (ESI MS) methods were used to determine differences in physicochemical parameters between the untreated and plasma-treated water. It has been established that the water subjected to plasma treatment shows much different gas absorption properties than the untreated water samples, as a function of temperature and pressure, in this paper we report exemplary data for CO<sub>2</sub>, oxygen and acetylene. The improved gas absorption properties of the plasma-treated water make it attractive for the use in industrial processes. It is worth pointing to a great capacity of the new reactor (4000 l/h), and low energy consumption (20 MJ/h) for the treatment of the above mentioned volume flow rate of water. 展开更多
关键词 Flow-Through Plasma Reactor for Water Treatment Modification of the Properties of Water/Aqueous Solutions Industrial production of Water Physicochemical Parameters of Water Solution
下载PDF
Small Optical Product Breeds Large Industry
8
作者 Lily Wang 《China's Foreign Trade》 2016年第5期46-47,共2页
China is the world’s largest consumer market for eyeglasses,with the total market volume reaching 80billion yuan.Accordingly,the market has a group of 800 million consumers demanding eyeglasses.The consumers are from... China is the world’s largest consumer market for eyeglasses,with the total market volume reaching 80billion yuan.Accordingly,the market has a group of 800 million consumers demanding eyeglasses.The consumers are from different ages。 展开更多
关键词 Small Optical Product Breeds Large industry line THAN high down more
下载PDF
Liaoning Light Industry Products Im-Exp. Corp.
9
《China's Foreign Trade》 1994年第8期24-24,共1页
The Liaoning Light Industrial Products Import and Export Corporation founded in 1954 is the first legally recognized enterprise established in Northeast China. Liaoning province is the show place and gateway to North ... The Liaoning Light Industrial Products Import and Export Corporation founded in 1954 is the first legally recognized enterprise established in Northeast China. Liaoning province is the show place and gateway to North east China, and a bridge between Asia and Europe. The geographic location and the natural environment of the region with 展开更多
关键词 Corp Liaoning Light industry Products Im-Exp
下载PDF
Conditional Optimization of Laccase Production by Whiterot Fungi through Fermentation
10
作者 haixia liu li zhang liang qiao 《Agricultural Biotechnology》 CAS 2018年第2期81-84,共4页
Phanerochaete chrysosporium was selected as the production strain of laccase,and the effects of stirring speed,ventilation volume,culture temperature,inoculation amount and initial p H of medium on laccase production ... Phanerochaete chrysosporium was selected as the production strain of laccase,and the effects of stirring speed,ventilation volume,culture temperature,inoculation amount and initial p H of medium on laccase production by liquid fermentation in cylinder were studied. On the basis of single factor test,an orthogonal test was carried out to find optimal conditions for laccase production P. chrysosporium through liquid fermentation. These results showed that the stirring speed of fermentation cylinder had the highest effect on laccase production,and the optimal conditions were shown as follows: the temperature at 28 ℃,the rotating speed at 300 r/min,the ventilation volume of 5 L/min( ventilation ratio of 1.0 vvm),the initial p H of medium of 5,and the inoculation amount of 15%,which gave the highest laccase level of 14. 86 U/ml. 展开更多
关键词 White-rot fungi Phanerochaete chrysosporium Fermentation cylinder Laccase Industrial production Optimization conditionHome
下载PDF
ZTE Rolls Out a Series of Industry's First TD-SCDMA Handset Products at PT/WIRELESS & NETWORKS COMM CHINA 2007
11
《ZTE Communications》 2007年第4期67-67,共1页
ZTE Corporation (ZTE), a leading global provider of telecommunications equipment and network solutions, unveiled
关键词 SCDMA TD ZTE Rolls Out a Series of industry’s First TD-SCDMA Handset Products at PT/WIRELESS COMM PT
下载PDF
Analysis of Raw Materials Components of Dry Composite Mixes for Production Food Concentrates
12
作者 Tatyana Samuylenko 《Journal of Food Science and Engineering》 2019年第9期355-361,共7页
Background:The simplest and most convenient food technology is the using of dry composite mixtures.They have a lot of advantages.Dry composite mixtures,which would completely be the basis for the production of persona... Background:The simplest and most convenient food technology is the using of dry composite mixtures.They have a lot of advantages.Dry composite mixtures,which would completely be the basis for the production of personalized food concentrates,are not represented.The development of such dry composite mixtures is actual and of scientific and practical interest.The purpose of this research is the selection and justification of local import-substituting raw materials components for dry composite mixtures used as the basis for the production of food concentrates.As the objects of research,the raw materials components of the starch,fruit and vegetable,industry were selected.The work uses currently accepted standard research methods for organoleptic and physic-chemical parameters of raw materials components.The research was carried out within of the project“Theoretical Substantiation of Production Technology and the Development of Import-Substituting Food Products of Functional Purpose Based on Dry Composite Mixtures”,funded by the Belarusian Republican Foundation for Basic Research.Based on the researches,it was found out that in the composition of dry composite mixtures for the production of food concentrates it is expedient to use the following raw materials:potato starch,extruded corn starch,dried carrots,dried beets,dried topinambur and dried apples in chopped form. 展开更多
关键词 Dry composite mixtures food concentrates raw materials components starches processed products of the fruit and vegetable industry
下载PDF
Main Results of an Energy Audit in a Milk Processing Industry in Taquara,Southern Brazil
13
作者 Rejane G.Goncalves Elton G.Rossini +1 位作者 José de Souza Alexandre Beluco 《Journal of Power and Energy Engineering》 2018年第1期21-32,共12页
The industrial energy diagnosis presented in this work occurred in a milk product cooperative, from an analysis of energy consumption in the main milk industrialization and a diagnosis of energy end uses of lighting a... The industrial energy diagnosis presented in this work occurred in a milk product cooperative, from an analysis of energy consumption in the main milk industrialization and a diagnosis of energy end uses of lighting and cooling systems. Almost all stages of milk industrialization are used hot water and steam generated in the boilers. The largest electricity consumption in this sector is by electric motors followed by cooling needed to maintain the quality of milk products. Because energy costs represent a significant portion of the monthly cost of the company, an analysis of the energy costs of the past two years to check the consumption of active and reactive energy and power demand contracted is performed. This paper presents the main results of an energy audit in a milk processing industry in southern Brazil. 展开更多
关键词 Energy Audit Energetic Efficiency Milk Products industry
下载PDF
The Impact of Digital Economy on Total Factor Productivity of China’s Service Industry
14
作者 Chunyan Liang Zhengyuan Chen 《Journal of Finance Research》 2021年第2期90-101,共12页
As a kind of integrated economy,digital economy has an important impact on the economic growth and production and lifestyle of multiple countries and regions,and plays a significant role in promoting the reconstructio... As a kind of integrated economy,digital economy has an important impact on the economic growth and production and lifestyle of multiple countries and regions,and plays a significant role in promoting the reconstruction of the international economic pattern.As an important industry of China’s national economy,the service industry is crucial to China’s economic growth.This paper measures the development level of digital economy in provinces and cities through constructing digital economy index system,uses super efficiency SBM-Malmquist model to measure total factor productivity of service industry,and tests the influence effect of digital economy on total factor productivity of Chinese service industry.Finally,the optimization path of digital economy on China’s service industry is proposed. 展开更多
关键词 Digital economy Total factor productivity of service industry Super-efficiency SBM-Malmquist
下载PDF
Carbon emission efficiency of forest processing industries in China
15
作者 GUAN Zhi-jie Yahaya Idris MUSA +1 位作者 ZHANG Ya-xin GUO Zhi-yuan 《Ecological Economy》 2023年第3期217-232,共16页
This paper uses an input-output table of China's provinces(2007-2016) to measure carbon emissions of these industries.It employs a Malmquist-Luenberger(ML) index with expected and undesired outputs,and an absolute... This paper uses an input-output table of China's provinces(2007-2016) to measure carbon emissions of these industries.It employs a Malmquist-Luenberger(ML) index with expected and undesired outputs,and an absolute β convergence and a conditional β convergence model,to conduct an in-depth analysis of dynamic changes and spatial convergence.Carbon emission efficiency of forest processing industries in 25 regions,including Shanghai,Chongqing,Zhejiang,and Jiangsu are increasing,whereas those of Tianjin,Liaoning,Heilongjiang,and Tibet are decreasing.The main contributing factors of carbon emission efficiency in three major regions vary over time.Further,carbon emission efficiency in the eastern,central,and western regions all have absolute β convergence and conditional β convergence,indicating that different regions are developing toward their own goals and industry,yet regions with lower efficiency are catching up with those where with more efficient strategies in place.Finally,this paper proposes according recommendations. 展开更多
关键词 input-output model ML index CONVERGENCE carbon emission efficiency forest industry production
下载PDF
The Impact of the Establishment of National High-tech Zones on Total Factor Productivity of Chinese Enterprises
16
作者 Wang Mingyi Liu Xiaoyu 《China Economist》 2023年第3期68-93,共26页
The National High-tech Zone(NHTZs)is an important strategic platform for cultivating high-tech industries and realizing high-quality economic development in China.Based on the combined data from 2006 to 2014 of the in... The National High-tech Zone(NHTZs)is an important strategic platform for cultivating high-tech industries and realizing high-quality economic development in China.Based on the combined data from 2006 to 2014 of the industrial enterprise database,the customs database,and the China Development Zones Audit and Announcement Catalogue(abbreviated asthe Catalogue),this paper systematically investigates the influence of the construction of NHTZs on enterprise’s total factor productivity(TFP).Results show that NHTZs have a positive impact on the TFP of enterprises in the zone,and this conclusion is still valid after considering endogeneity problems.Furthermore,the above productivity effects of NHTZs are heterogeneous in terms of enterprise ownership,external environment and establishment time,and NHTZs have greater stimulation effects on enterprise productivity after comparing with other types of functional zones.An investigation of the specific mechanisms at play shows that NHTZs promote the TFP of enterprises in the zone through the release of preferential policies,strengthening the“technology spillover effects”of imported intermediate goods,enhancing enterprise’s innovation ability and attracting talent.In addition,based on the decomposition of industry productivity,this paper also investigates the impact of NHTZs on changes in industry productivity and finds that NHTZs promote the overall productivity of specific industries mainly by stimulating the productivity improvement of incumbent enterprises and expanding the market share of high-productivity enterprises.Moreover,the preferential policies of NHTZs do not significantly stimulate high-productivity enterprises to enter the zones,nor do they cause low-productivity enterprises to exit.This research is helpful in objectively evaluating the economic effects of the NHTZs in China and in providing a theoretical basis for its further adjustment. 展开更多
关键词 National High-tech Zones(NHTZs) total factor productivity(TFP) DIFFERENCE-IN-DIFFERENCES changes in industry productivity
下载PDF
Empirical Analysis of the Impact of Green Finance and Technological Progress on Total Factor Productivity in China’s Industrial Sector
17
作者 Yingying Zhou Guoqiang Chen +3 位作者 Lujiu Huang Zhihao Lin Jing Jin Fengran Lu 《Proceedings of Business and Economic Studies》 2023年第6期39-44,共6页
The enhancement of industrial green total factor productivity is pivotal for achieving high-quality and sustainable economic development.This study assesses China’s performance using the SBM-GML model,employing provi... The enhancement of industrial green total factor productivity is pivotal for achieving high-quality and sustainable economic development.This study assesses China’s performance using the SBM-GML model,employing province-level panel data spanning from 2004 to 2020.Furthermore,we examine the influence of green finance and technological progress on industrial green total factor productivity using a spatial econometric model.The findings uncover that the relationship between the level of green financial development and industrial green total factor productivity follows a U-shaped curve.Initially,low levels of green financial development exert a suppressive effect on industrial green total factor productivity,proving ineffective in the short term.However,with the progression of green finance development,a positive and significant long-term impact on industrial green total factor productivity emerges.Moreover,technological progress demonstrates a noteworthy promotional effect on industrial green total factor productivity.The analysis delves deeper into revealing that industrial structure and environmental regulation intensity exhibit a significant negative relationship with industrial green total factor productivity.In contrast,both energy structure and education level showcase a substantial positive relationship with industrial green total factor productivity. 展开更多
关键词 Industrial green total factor productivity Green finance Technological progress
下载PDF
Recent advancements in metal-organic frameworks for green applications 被引量:8
18
作者 Chongxiong Duan Yi Yu +4 位作者 Jing Xiao Yuanyuan Li Pengfei Yang Fei Hu Hongxia Xi 《Green Energy & Environment》 SCIE CSCD 2021年第1期33-49,共17页
A series of environmental and energy issues,such as global warming,water pollution,acid rain,and energy shortage,have to be settled urgently.Metal-organic frameworks(MOFs)are compounds consisting of metal ions or clus... A series of environmental and energy issues,such as global warming,water pollution,acid rain,and energy shortage,have to be settled urgently.Metal-organic frameworks(MOFs)are compounds consisting of metal ions or clusters coordinated to organic ligands,which show great promise for alleviating or mitigating these challenges owing to their outstanding physical and chemical properties.In this review,we summarize the recent advances of MOFs in the fields of green applications,including carbon capture,harmful gas removal,sewage treatment,and green energy storage.In addition,the challenges and prospects of the large-scale commercialized use of MOFs in handling environmental issues are also discussed. 展开更多
关键词 Metal-organic frameworks Environmental and energy issues Industrial production Green applications
下载PDF
Relieving segregation in twin-roll cast Mg-8Al-2Sn-1Zn alloys via controlled rolling 被引量:6
19
作者 Shao-You Zhang Cheng Wang +4 位作者 Hong Ning Tong Wang Cheng-Cheng Zhang Zhi-Zheng Yang Hui-Yuan Wang 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2021年第1期254-265,共12页
Twin-roll casting(TRC)of Mg alloys with high Al content has unique advantages and broad development prospects.However,the severe segregation of high-alloyed Mg caused by TRC technology is difficult to solve at present... Twin-roll casting(TRC)of Mg alloys with high Al content has unique advantages and broad development prospects.However,the severe segregation of high-alloyed Mg caused by TRC technology is difficult to solve at present,which restricts its practical application.In this work,the homogenization of coarse segregated phases in a twin-roll cast Mg-8Al-2Sn-1Zn(ATZ821)alloy was successfully achieved by a method combining solid-solution heat treatment and controlled rolling,which is suitable for industrial-scale production.In addition,the evolution of the microstructure was studied in detail.It was found that phases dynamically precipitated and dissolved repeatedly during the hot rolling process,and the evolution of entire second phases can be classified into three stages,i.e.,the net dissolution,balancing and net precipitation stages.During the process,the large-size chain-like eutectic phases evolved into a fine and nearly spherical(∼0.4μm)morphology that was uniformly dispersed in the Mg-matrix due to the thermodynamic coupling and the Ostwald ripening effect.Moreover,a fine grain microstructure(∼4μm)was obtained.The formidable segregation problem of twin-roll cast Mg alloys with high Al content was solved,which is an important finding for the industrial application of high-alloyed twin-roll cast sheets.©2020 Published by Elsevier B.V.on behalf of Chongqing University. 展开更多
关键词 Twin-roll cast Mg alloys Segregated phase Microstructure evolution Industrial production
下载PDF
Contents and spatial distribution patterns of heavy metals in the hinterland of the Tengger Desert,China
20
作者 WANG Zhao WEI Junjie +2 位作者 PENG Wenbin ZHANG Rui ZHANG Haobo 《Journal of Arid Land》 SCIE CSCD 2022年第10期1086-1098,共13页
The desert in northern China is one of important sources of loess and one significant source of material for sandstorms in Asia.The sand/dust that is transported from desert when sandstorms occur can destroy the growt... The desert in northern China is one of important sources of loess and one significant source of material for sandstorms in Asia.The sand/dust that is transported from desert when sandstorms occur can destroy the growth of crops,cause serious losses and great harm to the economic construction and life safety,and cause natural environment pollution.Hence,it is very important to deepen the research into heavy metals in surface deposits at vulnerable ecological region of arid land of northern China to guide local industrial and agricultural development and improve environmental protection.In this research,10 heavy metal elements(Cr,Mn,Fe,Co,Ni,Cu,Zn,Cd,Pb,and Th)were tested and analyzed in 33 soil sample sites collected from the hinterland of the Tengger Desert,northern China.The results showed that the average abundance of Th exceeded its background soil value of China by more than 5.2 times,which suggests that the Tengger Desert is polluted by Th.In addition,based on principal component analysis,spatial differentiation,and correlation analysis,we identified the source of element with a coefficient of variation in abundance of greater than 0.5 or exceeding the background soil value of China.Principal component analysis and correlation analysis showed that the sources of heavy metals of Cr,Mn,Fe,Co,Ni,Cu,and Cd were similar,while those of Th and Zn were different.Moreover,based on the contents and spatial distribution characteristics of those heavy metal elements,we found that the formation of heavy metal elements enrichment areas is caused by industrial pollution,development of irrigated agricultural,geological,and geomorphic conditions,and the sedimentary environment in the study area.Our result can provide information on the environmental background values of soils in the hinterland of the Tengger Desert. 展开更多
关键词 Tengger Desert terrestrial deposit environmental pollution industrial and agricultural production natural factor
下载PDF
上一页 1 2 3 下一页 到第
使用帮助 返回顶部