摘要
为了解山东安丘地区土壤重金属污染现状,在该区系统采集了10194件表层土壤样品,对Cd、Hg、Pb、As等8种重金属元素含量开展测试分析,并采用地学统计、多元统计等分析方法,探讨重金属元素的地球化学分布特征及其可能的来源。结果表明,研究区土壤中Cd、Hg、As含量平均值与潍坊市土壤背景值相当,其他元素含量平均值稍高于潍坊市土壤背景值,8种重金属元素均值均小于规范风险筛选值。根据聚类分析,8种重金属元素主要分为4类,第一类为Cr、Ni、Cu和Zn,其分布主要受成土母质等自然因素的影响,且Zn同时还受人类活动影响;第二类为Cd、Pb,第三类为Hg,其分布特征受金属冶炼加工、交通、采矿等人类活动影响较大;第四类为As,除继承成土母质外,其分布特征还受人为活动的影响。采用《土壤环境质量农用地土壤污染风险管控标准(试行)》(GB 15618—2018)评价研究区土壤环境质量,结果表明研究区土壤环境以安全区为主,无风险,仅在个别地方存在点源污染。
In order to understand the status of soil heavy metal pollution in Anqiu Area,Shandong Province,10194 soil samples are systematically collected,the contents of 8 heavy metal elements including Cd,Hg,Pb and As are tested and analyzed.The geochemical distribution characteristics of heavy metal elements and their possible sources are discussed by using geostatistical and multivariate statistical methods.The results show that the average contents of Cd,Hg and As in the soil of the study area are similar to the background values of Weifang soil,and the average contents of other elements are slightly higher than the soil background values of Weifang.The average contents of the 8 heavy metal elements are all lower than risk screening values of standard.According to cluster analysis,eight heavy metal elements are mainly divided into four categories.The first category is Cr,Ni,Cu and Zn,whose distributions are mainly affected by natural factors such as the parent material of the soil,while Zn is also affected by human activities.The second category is Cd,Pb and the third category is Hg.The distribution characteristics of these elements are greatly affected by human activities such as metal smelting and processing,transportation,mining,etc.The fourth category is As,which is not only inherited from the the parent material of the soil,but also affected by human activities.The soil environmental quality in the study area is evaluated by Soil Environmental Quality Risk Control Standard for Soil Contamination of Agricultural Land(GB 15618—2018),the results show that the soil environment in the study area is mainly safe zone,risk-freeand.Point source pollution only exists in some places.
作者
赵秀芳
张永帅
冯爱平
王艺璇
夏立献
王宏雷
杜伟
ZHAO Xiu-Fang;ZHANG Yong-Shuai;FENG Ai-Ping;WANG Yi-Xuan;XIA Li-Xian;WANG Hong-Lei;DU Wei(The Seventh Geological and Mineral Exploration Institute,Linyi 276006,China;College of Horticulture,Nanjing Agricultural University,Nanjing 210095,China)
出处
《物探与化探》
CAS
北大核心
2020年第6期1446-1454,共9页
Geophysical and Geochemical Exploration
基金
山东省财政基金项目(鲁勘字(2016)57号)。
关键词
土壤重金属元素
地球化学特征
环境评价
安丘市
soil heavy metal elements
geochemical characteristics
environmental assessment
Anqiu city
