【摘 要】
:
In order to explore the contributions of wet deposition and surface runoff formed by rainfall events to the water body mercury burden in Three Gorges Reserv
【机 构】
:
CollegeofResourcesandEnvironment,SouthwestUniversity,Chongqing,400715,ChinaCollegeofResourcesandEnvi
【出 处】
:
The 17th International Conference on Heavy Metals in the Env
论文部分内容阅读
In order to explore the contributions of wet deposition and surface runoff formed by rainfall events to the water body mercury burden in Three Gorges Reservoir,we conducted a one-year successive study on the deposition fluxes and runoff output characteristics of total mercury(THg)and methylmercury(TMeHg)in a typical small agricultural watershed in Three Gorges Reservoir area.The results showed that the annual average values and annual deposition fluxes of THg and TMeHg in rainfall were 34.35±27.31 ng?L-1 and 0.347±0.218 ng?L-1,12.43 ?g m-2 yr-1 and 174.00 ng m-2 yr-1,respectively.Moreover,both THg and TMeHg were dominated by the particulate phase.The annual average concentrations and output fluxes of THg and TMeHg in surface runoff were 10.40±6.48 ng?L-1 and 0.154±0.146 ng?L-1,1.17±0.73 ?g m-2 yr-1 and 17.26±16.36 ng m-2 yr-1,respectively.Combining with deposition fluxes,the retention rates of THg and TMeHg in study area were 90.59%and 90.08%,respectively.However,the two sub-catchments exhibited different retention effects,and retention rate was affected by human activities,climate,topography and geomorphology,land use,and other factors.
其他文献
There are far reaching and long term implications of the presence of heavy metals on the environment and human health.The need to identify the sources of th
Field investigations were conducted to study the temporal and spatial distribution characteristics of total culturable bacteria(TCB)and its relationship wit
The mercury deposit in Guizhou,Danzhai is a typical Carlin-type gold deposit which also contains other heavy metals like Hg and As.During mining,the slags p
In countries characterised by a strong and widespread degree of contamination,the ranking of priorities in the framework of a regional environmental soil re
Groundwater spatial and temporal distribution of iron and manganese concentration from the Chandrapur district of Central India was assessed during winter 2
Arsenic(As)is a highly toxic element which has raised serious concern to human health.The occurance of heavy metals in lacustrine ecosystem has been intensi
To connect hyperspectral remote sensing technology and monitor of heavy metal pollution in wetland,a field experiment was taken to study hyperspectral respo
For understanding the mercury(Hg)pollution level and corresponding ecological risk in agricultural watershed of Three Gorges Reservoir areas,thus a typical
Sediments function as a sink for heavy metals from diverse sources,reflecting the natural soil composition of the surrounding areas,as well as human activit
Uranium(U)is the most common radioactive contaminant in groundwater and sediments at U mining and processing sites,as well as nuclear waste storage sites.It