The five chemical associations of heavy metals have been extracted continuously using the Tessier extracting method. Results show that Cu, Pb, Fe, Zn and Cr in the sediments are mainly distributed in residual fraction...The five chemical associations of heavy metals have been extracted continuously using the Tessier extracting method. Results show that Cu, Pb, Fe, Zn and Cr in the sediments are mainly distributed in residual fraction, while the major chemical association of Mn is carbonates. Carbonate heavy metals are converted into Fe-Mn oxides in autumn. And in the low tidal flat, after carbonates have changed into ionic heavy metals, some of the elements are transported to the overlying water. Cu, Pb, Fe and Mn have good correlations with each other, and Zn, Cr also show their similarity of chemical behavior in the sediments.展开更多
Relationships between environmental pollution and economic development in Binzhou during 2001- 2013 were studied through an Environmental Kuznets Curve( EKC). The results showed that with the increase of GDP per capit...Relationships between environmental pollution and economic development in Binzhou during 2001- 2013 were studied through an Environmental Kuznets Curve( EKC). The results showed that with the increase of GDP per capita,the emissions of industrial wastewater,COD and ammonia nitrogen in Binzhou City increased at first and then decreased during 2001- 2013,showing inverted-U-shaped curves where turning points appeared in the middle; the emission of domestic sewage showed an upward trend,and a turning point would not appear in a short term; the emissions of domestic COD and ammonia nitrogen dropped firstly and then rose gradually,showing U-shaped curves,and they would not decrease in a short time. The turning points of industrial wastewater,COD and ammonia were at( 4. 29,14 550),( 2. 46,44 803) and( 2. 27,2 708) respectively; domestic sewage had no turning point,and domestic COD and ammonia nitrogen would not reach the turning points in a short term.展开更多
In order to understand the change characteristics of ecological landscape pattern of desert sewage discharge area in the desert-oasis ecotone on the southern edge of Junggar Basin,Xinjiang,based on the remote sensing ...In order to understand the change characteristics of ecological landscape pattern of desert sewage discharge area in the desert-oasis ecotone on the southern edge of Junggar Basin,Xinjiang,based on the remote sensing images of 13 scenes GF1 and GF2 from 2013 to 2019,through image preprocessing,classification interpretation,GIS spatial analysis and landscape pattern index,the conclusions were as follows.From 2013 to 2019,the landscape area of sparse shrub forest land,grassland and saline alkali land increased,while the area of sandy bare land and pond surface increased.The mutual transformation among various types of landscapes was more active,among which the mutual transfer between sandy bare land and sparse shrub forest land was the most frequent.Various landscape dynamics changed significantly with time.All kinds of landscapes and the overall landscape showed the trend of fragmentation,discretization and complexity,and the overall landscape showed the trend of balanced distribution.The above results hoped to provide basic data and technical basis for eco-environmental protection,restoration and treatmen on the southern edge of Junggar Basin,and fill the current research gap.展开更多
The rapid development of large-scale livestock and poultry breeding industry causes a large number of slurry and waste, which bdngs great pressure on the surrounding environment and has become an important factor for...The rapid development of large-scale livestock and poultry breeding industry causes a large number of slurry and waste, which bdngs great pressure on the surrounding environment and has become an important factor for environmental pollution. To further ascertain the pollution emissions of livestock and poultry breeding industry, protect people＇s health and successfully complete the first national census of pollution sources, a large-scale piggery and a breeding field were selected for monitoring. The results revealed that monitoring indicators in pollution sources of livestock and poultry breeding industry showed significantly positive correlation with breeding size and nutritional level, but negative correlation with animal breeding age. Monitoring indicators in summer and autumn were higher than those in spring and winter, and monitoring indicators of sewage in the piggery reduced significantly through sedimentation process.展开更多
The article improves the process of dielectric barrier discharge(DBD)activated anode bonding.The treated surface was characterized by the hydrophilic surface test.The results showed that the hydrophilic angle was sign...The article improves the process of dielectric barrier discharge(DBD)activated anode bonding.The treated surface was characterized by the hydrophilic surface test.The results showed that the hydrophilic angle was significantly reduced under nano-gap conditions and the optimal discharge voltage was 2 kV.Then,the anodic bonding and dielectric barrier discharge activated bonding were performed in comparison experiments,and the bonding strength was characterized by tensile failure test.The results showed that the bonding strength was higher under the nano-gap dielectric barrier discharge.This process completed 110°C ultra-low temperature anodic bonding and the bonding strength reached 2 MPa.Finally,the mechanism of promoting bonding after activation is also discussed.展开更多
基金This work is supported by the National Natural Science Focal Projects Foundation of China(Grant No.40131020)the National Natural Science Foundation of China(Grant No.49833030)+2 种基金the Venus Program Foundation for Young Scientists of Shanghai(Grant No.97QA14023)its Tracking Program(Grant No.01QMH1406)the Dawn Program of Shanghai Ecucational Development Foundation.
文摘The five chemical associations of heavy metals have been extracted continuously using the Tessier extracting method. Results show that Cu, Pb, Fe, Zn and Cr in the sediments are mainly distributed in residual fraction, while the major chemical association of Mn is carbonates. Carbonate heavy metals are converted into Fe-Mn oxides in autumn. And in the low tidal flat, after carbonates have changed into ionic heavy metals, some of the elements are transported to the overlying water. Cu, Pb, Fe and Mn have good correlations with each other, and Zn, Cr also show their similarity of chemical behavior in the sediments.
基金Supported by the Soft Scientific Research Planning Project of Binzhou City(2014RKX10)Scientific and Technological Development Planning Project of Binzhou City(2013ZC1606)
文摘Relationships between environmental pollution and economic development in Binzhou during 2001- 2013 were studied through an Environmental Kuznets Curve( EKC). The results showed that with the increase of GDP per capita,the emissions of industrial wastewater,COD and ammonia nitrogen in Binzhou City increased at first and then decreased during 2001- 2013,showing inverted-U-shaped curves where turning points appeared in the middle; the emission of domestic sewage showed an upward trend,and a turning point would not appear in a short term; the emissions of domestic COD and ammonia nitrogen dropped firstly and then rose gradually,showing U-shaped curves,and they would not decrease in a short time. The turning points of industrial wastewater,COD and ammonia were at( 4. 29,14 550),( 2. 46,44 803) and( 2. 27,2 708) respectively; domestic sewage had no turning point,and domestic COD and ammonia nitrogen would not reach the turning points in a short term.
基金Supported by Special Project for the Construction of Innovation Environment(Talent and Base)in Xinjiang Uygur Autonomous Region in 2020:Construction of Scientific and Technological Innovation Base(Construction of Resource Sharing Platform)(PT2034)Innovation Fund of Xinjiang Academy of Environmental Protection Science(202002).
文摘In order to understand the change characteristics of ecological landscape pattern of desert sewage discharge area in the desert-oasis ecotone on the southern edge of Junggar Basin,Xinjiang,based on the remote sensing images of 13 scenes GF1 and GF2 from 2013 to 2019,through image preprocessing,classification interpretation,GIS spatial analysis and landscape pattern index,the conclusions were as follows.From 2013 to 2019,the landscape area of sparse shrub forest land,grassland and saline alkali land increased,while the area of sandy bare land and pond surface increased.The mutual transformation among various types of landscapes was more active,among which the mutual transfer between sandy bare land and sparse shrub forest land was the most frequent.Various landscape dynamics changed significantly with time.All kinds of landscapes and the overall landscape showed the trend of fragmentation,discretization and complexity,and the overall landscape showed the trend of balanced distribution.The above results hoped to provide basic data and technical basis for eco-environmental protection,restoration and treatmen on the southern edge of Junggar Basin,and fill the current research gap.
文摘The rapid development of large-scale livestock and poultry breeding industry causes a large number of slurry and waste, which bdngs great pressure on the surrounding environment and has become an important factor for environmental pollution. To further ascertain the pollution emissions of livestock and poultry breeding industry, protect people＇s health and successfully complete the first national census of pollution sources, a large-scale piggery and a breeding field were selected for monitoring. The results revealed that monitoring indicators in pollution sources of livestock and poultry breeding industry showed significantly positive correlation with breeding size and nutritional level, but negative correlation with animal breeding age. Monitoring indicators in summer and autumn were higher than those in spring and winter, and monitoring indicators of sewage in the piggery reduced significantly through sedimentation process.
基金Project(6140863020216JW30001)supported by the General Armaments Department Pre-research Fund,China。
文摘The article improves the process of dielectric barrier discharge(DBD)activated anode bonding.The treated surface was characterized by the hydrophilic surface test.The results showed that the hydrophilic angle was significantly reduced under nano-gap conditions and the optimal discharge voltage was 2 kV.Then,the anodic bonding and dielectric barrier discharge activated bonding were performed in comparison experiments,and the bonding strength was characterized by tensile failure test.The results showed that the bonding strength was higher under the nano-gap dielectric barrier discharge.This process completed 110°C ultra-low temperature anodic bonding and the bonding strength reached 2 MPa.Finally,the mechanism of promoting bonding after activation is also discussed.
