天津设施蔬菜土壤重金属积累及风险评价研究  

Accumulation and Risk Assessment of Heavy Metals in Facility Vegetable Soil in Tianjin

作　　者：张慧 王晓风 赵会薇 李梦琦 张余良[1] 肖辉 ZHANG Hui;WANG Xiaofeng;ZHAO Huiwei;LI Mengqi;ZHANG Yuliang;XIAO Hui(Institute of Agricultural Resources and Environment,Tianjin Academy of Agricultural Sciences,Tianjin 300384,China;The Semi-arid Agriculture Science and Technology Research Center of China,Shijiazhuang,Hebei 050051,China)

机构地区：[1]天津市农业科学院农业资源与环境研究所,天津300384 [2]国家半干旱农业工程技术研究中心,河北石家庄050051

出　　处：《天津农业科学》2023年第8期66-71,共6页Tianjin Agricultural Sciences

基　　金：河北省创新能力提升计划项目(19244010D);天津市农业科学院青年科技创新项目(2021008);天津市创新平台专项(19PTZWHZ00040)。

摘　　要：为探明天津市设施土壤中重金属累积现状及风险,调查分析了天津市10个涉农区的设施土壤(0~20 cm)中Cd、Pb、As、Hg、Cr、Cu、Zn、Ni8种重金属的积累及生态风险评价。结果表明:Cd是天津市设施土壤唯一的污染物,平均含量为0.55 mg·kg-1,超过天津市背景值的551%;静海区、西青区2个采样点的Cd超过风险筛选值,超出率为8.46%、37.54%,Cd在西青区表现为中等危害。其余7种重金属在各区均表现为轻度危害。10个区中,东丽区、静海区、蓟州区的综合污染指数为0.72、0.80、0.73,属于警戒级别;西青区的综合污染指数为1.03,轻度污染;其余6区的综合污染指数均在0.7以内,为安全级。10个区的潜在生态风险指数均低于150,表现为轻微生态危害。综上所述,天津市设施种植中要着重注意Cd的富集问题及修复措施。To explore the accumulation risk of heavy metals in facility soils,the investigation of Cd,Pb,As,Hg,Cr,Cu,Zn and Ni of 10 agricultural districts in Tianjin were analyzed.The results showed that Cd was the only pollutant in the facility soil in Tianjin,with an average of 0.55 mg·kg-1,which exceeded the background value of Tianjin by 551%.Cd in Jinghai and Xiqing district exceeded the risk screening value by 8.46%and 37.54%.Cd in Xiqing district was moderately harmful.The other 7 heavy metals showed less harm in other districts.Among the 10 districts,Nemero composite pollution index of Dongli,Jinghai and Jizhou district was 0.72,0.80 and 0.73,belonged to the alert level.The Nemero composite pollution index of Xiqing district was 1.03,indicating mild pollution.The Nemero composite pollution index of the other 6 districts was within 0.7,considered as safety.The potential ecological index of the 10 districts was lower than 150,indicating slight ecological harm.In conclusion,Cd enrichment should be cared in Tianjin facility planting.

关 键 词：设施土壤 重金属 风险评价 天津 

分 类 号：X825[环境科学与工程—环境工程]