典型电子废弃物拆解区周围土壤-水稻系统中重金属污染和富集特征研究  

Characteristics of heavy metal pollution and enrichment in soil-rice system around a typical e-waste disposal area

作　　者：刘芳[1,2] LIU Fang(Shanghai Academy of Environmental Sciences,Shanghai 200233;Ministry of Ecology and Environment Engineering Center for Urban Soil Contamination Control and Remediation,Shanghai 200233)

机构地区：[1]上海市环境科学研究院,上海200233 [2]生态环境部城市土壤污染控制与修复工程技术中心,上海200233

出　　处：《环境污染与防治》2025年第4期21-26,I0002,共7页Environmental Pollution & Control

摘　　要：测定了典型电子废弃物拆解区广东省贵屿镇循环经济产业园周边稻田土壤及水稻中的7种重金属(Cu、Cr、Zn、Cd、Pb、As、Sb),探究了土壤中重金属的污染情况和水稻中重金属的富集特征。结果表明,该电子废弃物拆解区周围稻田土壤中7种重金属均具有一定的积累效应,但只有Cu平均浓度超过了《土壤环境质量农用地土壤污染风险管控标准(试行)》(GB 15618—2018)的风险筛选值,而Cd和Sb存在潜在生态风险。土壤中积累的重金属主要来源于电子废弃物拆解活动,Cu和Pb还可能与附近的冶金厂有关。重金属在水稻根系中的富集能力远大于地上部分,米中富集的重金属均未超出《粮食(含谷物、豆类、薯类)及制品中铅、铬、镉、汞、硒、砷、铜、锌等八种元素限量》(NY 861—2004)。7 heavy metals(Cu,Cr,Zn,Cd,Pb,As and Sb)in the soil and rice were determined around Guiyu Town,Guangdong Province,a typical e-waste disposal area,and the pollution situation of heavy metals in the soil and the enrichment characteristics of heavy metals in rice were explored.Results showed that the 7 heavy metals all had a certain accumulation effect.But only the average mass concentration of Cu exceeded the risk screening value of“Soil environmental quality-risk control standard for soil contamination of agricultural land”(GB 15618-2018),and Cd and Sb had potential ecological risk.The accumulated heavy metals mainly came from the dismantling of e-waste,and Cu and Pb might also come from a nearby metallurgical plant.The enrichment ability of heavy metals in rice roots was much greater than that in upground parts.The enrichment amount still met“Limits of eight elements in cereals,legume,tubes and its products”(NY 861-2004).

关 键 词：电子废弃物拆解区 土壤-水稻系统 重金属 污染特征 富集特征 

分 类 号：X53[环境科学与工程—环境工程]