临沂市罗庄区郊区农田土壤重金属污染评价及溯源解析  

Evaluation and source analysis of heavy metal pollution in farmland soil in the suburbs of Luozhuang District,Linyi City

作　　者：果颖晨 刘朋军 宫雪晗 泮雪芹[1] 宫少燕[1] GUO Yingchen;LIU Pengjun;GONG Xuehan;PAN Xueqin;GONG Shaoyan(School of Resources&Environment,Linyi University,Linyi 276005,China;School of Civil Engineering&Architecture,Linyi University,Linyi 276005,China;School of Water Conservancy and Environment,University of Jinan,Jinan 250024,China)

机构地区：[1]临沂大学资源环境学院,山东临沂276005 [2]临沂大学土木工程与建筑学院,山东临沂276005 [3]济南大学水利与环境学院,山东济南250024

出　　处：《高师理科学刊》2024年第10期77-83,共7页Journal of Science of Teachers＇College and University

基　　金：大学生创新创业项目(X202310452543)。

摘　　要：为系统了解临沂市罗庄区郊区农田重金属污染状况、生态风险和污染来源,采集了81个采样单元的土壤样品,对Ti,Zn,Cr,Ni,Pb,Cu,As,Tl,Cd,Hg等10种元素进行测定分析,并结合变异系数、单因子指数、地累积指数、潜在生态指数法评估土壤重金属空间变异水平、污染程度、生态风险水平,运用主成分分析解析污染来源.结果表明,(1)临沂郊区农田中Ti,Zn,Cr,Ni,Pb,Cu,As,Tl,Cd,Hg的平均质量分数分别为3730,53,55,25,22,17.1,7.20,0.39,0.14,0.043 mg·kg^(-1).相较于土壤背景值,Ti,Zn,Cr,Ni,Pb,Cu,Tl的平均质量分数均低于土壤背景值,As,Cd,Hg的平均质量分数高于土壤背景值,但10种元素的平均质量分数均低于风险筛选值.(2)Hg,Cd的变异系数高于50%,受外界活动干扰更为广泛;而Pb,Cu,Ti,Tl的空间变异等级为中度变异,受外界活动影响范围较小.(3)总体上,10种金属污染程度均为无污染;但个别地区Hg富集较重.(4)生态风险结果显示,研究区所有样点的综合潜在生态风险程度为低风险;而Hg污染的单因子潜在生态风险程度为中风险,其余9种元素单因子潜在生态风险程度属于低风险.(5)主成分分析结果解析得到3个主要污染来源:Tl,As,Zn,Cu,Ti,Cr,Ni主要受自然地质背景因素影响,Cd,Hg污染来主要自工农业生产排放,Pb污染基本来自交通活动排放.In order to systematically study the heavy metal pollution status,ecological risks and sources of heavy metal pollution in farmland soils in the suburbs of Luozhuang District,Linyi City.Soil samples were collected from 81 sampling units.Ten elements including Ti,Zn,Cr,Ni,Pb,Cu,As,Tl,Cd,Hg were measured and analyzed.And the spatial variation level,pollution degree and ecological risk level of soil heavy metals in the study area were evaluated by the methods of coefficient of variation,single factor index,geo-accumulation index and comprehensive potential ecological risk index,respectively.Pollution sources of soil heavy metal were analyzed by the method of principal component analysis.The results were as follows,(1)the average mass fractions of Ti,Zn,Cr,Ni,Pb,Cu,As,Tl,Cd and Hg in suburban farmland soils were 3730,53,55,25,22,17.1,7.20,0.39,0.14,0.043 mg·kg^(-1),respectively.Compared to the soil background value in Linyi city,the average mass fractions of Ti,Zn,Cr,Ni,Pb,Cu and Tl were lower,the average mass fractions of As,Cd and Hg were higher.However,the average mass fractions of every metal were lower than the risk screening value.(2)The variation coefficients of Hg and Cd were both higher than 50%,indicating that they were more widely affected by external activities.But the spatial variation levels of Pb,Cu,Ti and Tl were moderate,which were less affected by external activities.(3)Overall,the pollution levels of every metal in the study area were all pollution-free.However,in some areas where Hg was severely enriched.(4)The ecological risk results showed that the comprehensive ecological risk level of all sampling points in the study area was low risk.However,the potential ecological risk of single-factor pollution of the Hg was at medium risk level,and the potential ecological risk levels of single-factor pollution of the other 9 elements were all considered as low risk.(5)The results of principal component analysis revealed three main sources of pollution:Tl,As,Zn,Cu,Ti,Cr and Ni in the farmland soil of the

关 键 词：重金属污染 生态风险 农田土壤 来源 

分 类 号：Q958.113[生物学—动物学]