The continuous enrichment of heavy metals in soils has caused potential harm to groundwater.Quantitative methods to evaluate the harm of heavy metals in soil to groundwater are lacked in previous studies.Based on the ...The continuous enrichment of heavy metals in soils has caused potential harm to groundwater.Quantitative methods to evaluate the harm of heavy metals in soil to groundwater are lacked in previous studies.Based on the theory of groundwater circulation and solid-liquid equilibrium,a simple and easy-touse flux model of soil heavy metals migrating to groundwater is constructed.Based on groundwater environmental capacity,an innovative method for evaluating the harm of heavy metals in soil to groundwater is proposed,which has been applied in Hunchun Basin,Jilin Province,China.The results show that the fluxes of soil heavy metals into groundwater in the study area are Zn,Cu,As,Pb,Cd,Ni,and Hg in descending order.The content of heavy metals in groundwater(As,Hg,Cu,Pb,Zn,Ni,and Cd)in most areas has not risen to the threshold of environmental capacity within 10 years.The harm levels of soil heavy metals to groundwater in the most townships soils are at the moderate level or below.This evaluation method can quantify the flux of soil heavy metals into groundwater simply and quickly,determine the residual capacity of groundwater to heavy metals,evaluate the harm level of soil heavy metals to groundwater,provide support for relevant departments to carry out environmental protection of soil and groundwater,and provide a reference to carry out similar studies for related scholars.展开更多
文摘利用王水消解-双道原子荧光光谱法测定了山东省苹果主产区栖霞市果园土壤中的 As和 Hg含量，验证了检测方法的检出限、准确度与精密度，分析了栖霞市果园土壤中重金属As和 Hg的空间分布特征，并对栖霞市果园土壤中As和Hg的污染状况进行评价。结果表明：栖霞市果园土壤中As的含量范围为2.79～20.93 mg ＆#183; kg -1，平均值为10.59 mg ＆#183; kg -1，而Hg的含量范围为0.01～0.79 mg ＆#183; kg -1，平均值为0.12 mg ＆#183; kg -1。As元素在土壤中变异较小，而 Hg元素在土壤中变异较大。频数分布图显示，土壤中 As元素含量基本符合正态分布，含量大多在7～15 mg ＆#183; kg -1之间，土壤中Hg元素含量不符合正态分布，含量大多在0.03～0.21 mg ＆#183; kg -1之间。土壤As和 Hg含量与土壤各养分指标之间的相关性均不显著，且土壤中As和Hg两种元素之间亦无显著的相关关系。以国家绿色食品产地环境质量标准为评价依据，栖霞市果园土壤A s含量处于无污染的清洁水平，而土壤 H g的污染指数大于1的样点占总数的4.76％，需要引起管理者的注意。
基金supported by the project of China Geology Survey(12120115032801,DD20190340)。
文摘The continuous enrichment of heavy metals in soils has caused potential harm to groundwater.Quantitative methods to evaluate the harm of heavy metals in soil to groundwater are lacked in previous studies.Based on the theory of groundwater circulation and solid-liquid equilibrium,a simple and easy-touse flux model of soil heavy metals migrating to groundwater is constructed.Based on groundwater environmental capacity,an innovative method for evaluating the harm of heavy metals in soil to groundwater is proposed,which has been applied in Hunchun Basin,Jilin Province,China.The results show that the fluxes of soil heavy metals into groundwater in the study area are Zn,Cu,As,Pb,Cd,Ni,and Hg in descending order.The content of heavy metals in groundwater(As,Hg,Cu,Pb,Zn,Ni,and Cd)in most areas has not risen to the threshold of environmental capacity within 10 years.The harm levels of soil heavy metals to groundwater in the most townships soils are at the moderate level or below.This evaluation method can quantify the flux of soil heavy metals into groundwater simply and quickly,determine the residual capacity of groundwater to heavy metals,evaluate the harm level of soil heavy metals to groundwater,provide support for relevant departments to carry out environmental protection of soil and groundwater,and provide a reference to carry out similar studies for related scholars.
