摘要
为查明雄安新区西南部耕层土壤的重金属元素污染状况,以唐河唐河新道、清水河府河流经区域的农田土壤为研究对象,采用野外采样和室内分析相结合的方法,调查研究耕层(0~20 cm)土壤As、Cu、Zn、Ni、Pb、Cr、Cd和Hg元素的质量分数和分布特征,分析评价重金属元素的污染状况及潜在生态危害风险等级。调查表明,除Cd外,其它重金属元素的平均值均低于土壤风险筛选值,有55%的Cd元素样本超出筛选值,其平均值超出筛选值约26.67%;土壤中As、Cu、Zn、Pb和Cd元素均有不同程度污染,污染程度排序为Cd>Cu>As(Zn)>Pb,其中Cd的污染风险区大面积分布在研究区的中东部,具有典型面状污染特征,Cd元素重度和中度污染的比例分别为3.09%和12.74%;8种重金属元素潜在的生态危害程度排序为Cd>Hg>As>Pb>Cu>Ni>Cr>Zn,其中Cd的生态危害为强、很强和极强的超标率分别为32.43%、31.27%和4.63%;RI值为强生态危害及其以上的比例占38.61%,平均值为287.39。综上表明,雄安新区西南部耕层土壤整体存在重金属元素的污染,重金属的潜在危害程度为中等风险。
Top soil samples are collected from drainage areas of Tanghe-Tanghe Xindao river and Qingshuihe-Fuhe river to make clear distribution and assess pollution of heavy metals in Southwest Xiong’an New Area.The sampling depth is 0-20 cm.As,Cu,Zn,Ni,Pb,Cr,Cd and Hg are analyzed in Lab.The results show that the average concentrations of the metals are generally lower than those of risk screening value of the top soil except Cd.Concentration of Cd of 55%of the sample is averagely 26.67%above the risk screening value.However the other heavy metals show some pollution.The pollution degree is ordered Cd>Cu>As(Zn)>Pb.Cd pollution is distributed in large area in the middle and east part of the study area,the heavy and medium pollution 3.09%and 12.74%respectively.Their possible potential pollution risk is ordered Cd>Hg>As>Pb>Cu>Ni>Cr>Zn.Pollution of Cd to ecology is divided into three orders i.e.strong pollution,very strong pollution and extremely strong pollution with over standard rate of 32.43%,31.27%,4.63%,respectively;the RI value of strong,very strong and extremely strong potential risk idex 38.61%and the average 287.39.It is concluded that heavy metal pollution occur in the topsoil of the Southwest Xiong’an New Area and the potential risk would be medium.
作者
刘建霞
李浩
李金富
翟伟林
吴雪薇
王乾
LIU Jianxia;LI Hao;LI Jinfu;ZHAI Weilin;WU Xuewei;WANG Qian(Geophysical Exploration Academy of China Metallurgical Geology Bureau, Baoding 071051, Hebei, China)
出处
《地质找矿论丛》
CAS
2022年第2期235-243,共9页
Contributions to Geology and Mineral Resources Research
基金
中国冶金地质总局地球物理勘查院科技创新项目“雄安新区土壤重金属反演及航空高光谱数据预处理优化研究”(编号:KY201904)资助。
关键词
耕层土壤
重金属
分布特征
环境评价
雄安新区
Topsoil
heavy metal
distribution characteristics
environment assessment
Xiong’an New Area
作者简介
刘建霞(1986—),女,工程师,硕士,从事农田土壤重金属污染研究工作,通信地址:河北省保定市阳光北大街139号,地球物理勘查院,邮政编码:071051,E-mail:ljx_860728@163.com;通信作者:王乾(1975—),男,教授,博士,主要从事高光谱遥感、地理信息系统教学与科研工作,通信地址:安徽省铜陵市翠湖四路1335号,铜陵学院建筑工程学院,邮政编码:244061,E-mail:wqhello2000@163.com。
