陆浑水库滨岸带沉积物重金属污染评价及其迁移能力分析  

Pollution Assessment and Migration Capacity Analysis of Heavy Metal in the Coastal Sediments of Luhun Reservoir

作　　者：宋刚福[1,2] 丁孟浩 米晓 宋志鑫[1,2] SONG Gangfu;DING Menghao;MI Xiao;SONG Zhixin(North China University of Water Resources and Electric Power,Zhengzhou 450046,China;Key Laboratory of Water Environment Simulation and Treatment of Henan Province,Zhengzhou 450046,China)

机构地区：[1]华北水利水电大学,河南郑州450046 [2]河南省水环境模拟与治理重点实验室,河南郑州450046

出　　处：《华北水利水电大学学报（自然科学版）》2023年第1期100-108,共9页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：国家自然科学基金项目(42007356);河南省科技攻关项目(222102320023)。

摘　　要：为研究滨岸带沉积物重金属污染及迁移转化情况,以陆浑水库滨岸带为研究对象,采用地累积指数法和潜在生态风险评价法对重金属的污染程度及风险进行评价,并采用重金属活力值法评价重金属的迁移能力。结果显示:重金属Cu、Pb、Cd、Cr、Mo、Zn的含量均超出了土壤环境背景值,分别为背景值的2.88、2.61、21.54、2.02、78.87、1.19倍;各采样带中的重金属含量随海拔高度的变化而变化,其中,Cr、Zn、Cd、Pb和Mo的含量自L4采样带起随海拔的降低而逐渐下降;Mo存在严重超标现象,属于Mo极重度污染,Cd为中度、偏重度污染;陆浑水库滨岸带整体处于极强的污染状态,Mo和Cd是生态风险的主要贡献因子,各重金属的污染风险程度与地累积指数法的结果相符合;根据活力值法显示各重金属迁移能力由强到弱的顺序为:Cd>Pb>Mo>Cu>Zn≈Cr。In order to study the pollution,migration and transformation of heavy metals in the coastal sediments,taking the coastal zone of Luhun Reservoir as a research object,the pollution degree and risk of heavy metals were evaluated by geoaccumulation index method and potential ecological risk evaluation method,and the migration capacity was evaluated by heavy metal activity value method.The results show that the contents of heavy metals,they are Cu,Pb,Cd,Cr,Mo and Zn,exceeded the soil environmental background value,which were 2.88,2.61,21.54,2.02,78.87 and 1.19 times of the background value respectively;The concentrations of heavy metals in each sampling zone varied with the altitude.Among them,the concentrations of Cr,Zn,Cd,Pb and Mo gradually decrease with the reduction of altitude from L4;Mo content seriously exceeded the standard value,and Mo pollution belonged to extremely severe level,and Cd pollution was a medium to heavy level;The coastal zone of Luhun Reservoir as a whole,its pollution level was severe,Mo and Cd were the main contribution factor of ecological risk,and the pollution risk degree of each heavy metal was consistent with the results of geoaccumulation index method.According to the results of activity value method,the order of migration capacity of heavy metals from strong to weak is Cd>Pb>Mo>Cu>Zn≈Cr.

关 键 词：陆浑水库滨岸带 重金属污染 污染风险评价 迁移能力 

分 类 号：X522[环境科学与工程—环境工程]