Ecological risk assessment of heavy metals in sediments of a marine ranch in Hebei Province
This study uses monitoring data of mercury(Hg),cadmium(Cd),lead(Pb),copper(Cu),arsenic(As),and zinc(Zn)in the sediment of a certain sea area in Hebei Province in March 2022.Five ecological risk assessment methods are used to assess the ecological risk of the sea area,including single factor index method,Nimero comprehensive index method,sediment quality benchmark method,the potential hazard ecological index method and principal component analysis method were used to evaluate the composite pollution risk of nearshore sediment environment.The results showed that the average surface sediment concentrations of heavy metals Cu,Pb,Zn,Cd,Hg and As in the sea area were 20.3 mg/kg,17.9 mg/kg,63.3 mg/kg,0.135 mg/kg,0.036 mg/kg and 9.82 mg/kg,respectively.In the surface layer of these heavy metals,the content of Zn is the highest,the content of Cu and Pb is relatively high,and the content of Cd,Hg and As is relatively low.The single factor pollution index and Nimero comprehensive index of each heavy metal are both less than 1.It should be noted that different methods have differences in evaluating sediment risk,which may be due to different factors considered by different methods.Therefore,in sediment risk assessment,multiple factors need to be comprehensively considered.The ecological risk assessment of the sea area was conducted using multiple evaluation methods,and the results showed that the overall quality of the seabed surface sediment was good,the degree of heavy metal pollution was low,and the potential ecological risk was low.
Sedimentsheavy metalsrisk assessment of ecological hazards
NETL
NSTL
万方数据
