###
有色金属(冶炼部分):2021,(3):71-77
本文二维码信息
码上扫一扫!
基于体外模拟法评价南京某污灌区土壤及蔬菜重金属污染现状
韩承辉, 谢伟芳
(江苏开放大学)
Evaluating Heavy Metal Pollution Status of Soil and Vegetables in A Sewage Irrigation District of Nanjing with In-vitro Simulation Method
HAN Cheng-hui, XIE Wei-fang
(Jiangsu Open University,School of environment and ecology)
摘要
图/表
参考文献
相似文献
本文已被:浏览 4次   下载 2
投稿时间:2020-10-15    修订日期:2020-10-26
中文摘要: 为探究南京市郊某污灌区环境治理效果、小白菜中重金属健康风险及其根际土壤重金属超标情况,采用靶标危害系数及体外模拟法对研究区小白菜重金属健康风险进行评估,利用农用地土壤污染风险管控标准(试行) (GB 15618—2018)对比小白菜根际土壤重金属超标情况。结果显示,Cd在小白菜根际土壤中最小值达到0.95 mg/kg,最大值达到了1.14 mg/kg,平均1.05 mg/kg,均超过农用地土壤污染风险管控标准。对于成人和儿童,其THQ的最大值从大到小排序为Cu>Pb>Cr>Cd>Zn,小白菜对成人及儿童的HI值分别为6.75×10-3和5.76×10-3,两者均小于1,表明使用该模型评估得出小白菜中重金属对暴露人体造成的健康影响不明显。成人通过食用研究区小白菜日均摄入Pb、Zn、Cu和Cd的含量范围依次为337~430、3 294~3 025、359~540及288~483 mg。儿童通过食用研究区小白菜日均摄入Pb、Zn、Cu和Cd的含量范围分别为221~282、1 985~2 162、235~354及189~317 mg。综上所述,重金属生物可给量均未超过每周可耐受摄入量值,证明食用污灌区小白菜不存在重金属健康风险。与前次研究相比(采样时间相隔七年),相关部门对该区域环境治理取得了很好的效果,但还应注意Cd在土壤及小白菜中的迁移及富集。
Abstract:In order to explore effect of environmental remediation, health risk of heavy metals in Chinese cabbage and situation of heavy metals exceeding the standard values (GB 15618—2018) in rhizosphere soil of a sewage irrigation area in Nanjing suburb, health risk of heavy metals in Chinese cabbage was evaluated by target hazard quotients (THQ) and in-vitro simulation method through comparing concentration of heavy metal in rhizosphere soil of Chinese cabbage with the standard for soil pollution risk control of agricultural land (GB 15618—2018). The results show that the minimum, maximum and average values of Cd is 0.95, 1.14 and 1.05 mg/kg, respectively, which all exceed the standard of soil pollution risk control for agricultural land. For adults and children, the order of THQ values is Cu > Pb > Cr > Cd > Zn. The health index (HI) values of Chinese cabbage to adults and children are 6.75×10-3 and 5.76×10-3, respectively, both of them are less than 1, which indicates that heavy metals in Chinese cabbage had no significant impact on human health. The average daily intake of Pb, Zn, Cu and Cd in Chinese cabbage of adults is 337—430, 3 294—3 025, 359—540 and 288-483 mg, respectively. The average daily intake of Pb, Zn, Cu and Cd in Chinese cabbage of children is 221—282, 1 985—2 162, 235—354 and 189—317 mg, respectively. In summary, bioavailability of heavy metals do not exceed the weekly tolerable intake value, which indicates that there is no health risk for Chinese cabbage in edible sewage irrigation area. Compared with the previous study (sampling interval is 7 years), the relevant departments achieve significantly effects in regional environmental remediation, however, attention should still be paid to migration and accumulation of Cd in soil and Chinese cabbage.
文章编号:     中图分类号:    文献标志码:
基金项目:江苏省环境工程重点实验室科研开放基金课题(KF2015007);江苏省高等学校自然科学研究面上项目(17KJB610002)
引用文本:
韩承辉,谢伟芳.基于体外模拟法评价南京某污灌区土壤及蔬菜重金属污染现状[J].有色金属(冶炼部分),2021(3):71-77.
HAN Cheng-hui,XIE Wei-fang.Evaluating Heavy Metal Pollution Status of Soil and Vegetables in A Sewage Irrigation District of Nanjing with In-vitro Simulation Method[J].Nonferrous Metals (Extractive Metallurgy),2021(3):71-77.

我们一直在努力打
造,精品期刊,传
播学术成果

全国咨询服务热线
86-10-63299752/63299758

杂志信息

相关下载

期刊简介

联系我们

电话:010-63299752/63299758

传真:010-63299744

QQ:XXXXXXX

Email:ysyl@bgrimm.com

邮编:100160

地址:北京市南四环西路188号总部基地18区23号楼

关注微信公众号