矿区周边农田土壤与玉米作物重金属污染研究  

Pollution research of heavy metals in farmland soil and maize around a mining area

作　　者：苏艳芳 李明丽 赵培强 翟裕 丁国梁 SU Yan-fang;LI Ming-li;ZHAO Pei-qiang;ZHAI Yu;DING Guo-liang(Gansu Academy of Eco-Environmental Sciences,Lanzhou 730030,China;Key Laboratory of Industrials Waste(s)Recycling and Regulation,Gansu Province,Lanzhou 730030,China)

机构地区：[1]甘肃省生态环境科学设计研究院,甘肃兰州730030 [2]甘肃省工业废弃物循环与调控重点实验室,甘肃兰州730030

出　　处：《应用化工》2024年第5期1234-1237,共4页Applied Chemical Industry

基　　金：国家重点研发计划(2018YFC1802900);甘肃省自然科学基金(23JRRA1272)。

摘　　要：以西北某矿区为中心点,调查矿区周边玉米农田中土壤及玉米不同部位中铜(Cu)、镉(Cd)、镍(Ni)、铬(Cr)、铅(Pb)、汞(Hg)、锌(Zn)的含量,为评估重金属累积污染风险和实施污染土壤生态修复提供参考。结果表明,矿区附近种植玉米农用地耕植土中重金属Cr、Zn、Ni、Cu、Cd、Hg的含量与矿区中心点的距离呈显著负相关。玉米不同部位中重金属的含量水平为:Zn>Cu>Cr>Ni>Pb>Cd>Hg;重金属在不同部位中的最大富集系数为:玉米雄花序>玉米叶>玉米根>玉米种皮>玉米芯>玉米茎>玉米籽粒。Hg和Cd在玉米不同部位中的富集系数和转运系数均较高,应特别关注土壤中Hg、Cd污染风险给农田玉米种植带来的食品安全及生态安全风险。To find out heavy metals content and its distribution characters in soil and maize,a mining area in northwest China was chosen as the center,investigated the contents of cadmium(Cd),mercury(Hg),lead(Pb),chromium(Cr),copper(Cu),nickel(Ni)and zinc(Zn)in soil and different parts of maize around the mining area,provided reference for reasonable evaluation of heavy metals pollution and ecological remediation of contaminated soil.The results showed that there was a significant negative correlation between the content of heavy metals Cr,Zn,Ni,Cu,Cd,and Hg in the farmland soil and the distance from the center of the mining area.The contents of heavy metals in different parts of maize were Zn>Cu>Cr>Ni>Pb>Cd>Hg.The maximum enrichment coefficients of heavy metals in different parts of maize were as follows:male inflorescence>maize leaf>maize root>maize husk>maize cob>maize stem>maize grains.The enrichment and transport coefficients of Hg and Cd in different parts of maize are relatively high,and special attention should be paid to the risk of soil Hg and Cd pollution,as well as the food safety and ecological safety risks caused by maize cultivation in farmland.

关 键 词：土壤 玉米 重金属 污染特征 

分 类 号：TQ016[化学工程] TQ13[农业科学—作物学] S513[环境科学与工程—环境工程] X53