| 张海锋,李晓玲,罗玉红,戴泽龙,胥焘,黄应平.宜昌近郊污水灌溉区水芹重金属污染状况及健康风险评价[J].农业环境科学学报,2015,34(8):1470-1477. |
| 宜昌近郊污水灌溉区水芹重金属污染状况及健康风险评价 |
| Heavy Metal Pollution and Health Risk Assessment of Oenanthe javanica(Blume) DC. Grown in Sewage Irrigated Soils in Yichang Suburbs |
| 投稿时间：2015-02-08 |
| DOI：10.11654/jaes.2015.08.006 |
| 中文关键词: 重金属 健康风险评价 污灌区 宜昌 |
| 英文关键词: heavy metals health risk assessment sewage-irrigated area Yichang |
| 基金项目:国家水专项子课题(2012ZX07104-003-04);科技惠民计划项目(S2013GMD100042);2014年三峡大学研究生科研创新基金项目(11) |
| 作者 | 单位 | E-mail | | 张海锋 | 三峡大学水利与环境学院, 湖北 宜昌 443002
三峡地区地质灾害与生态环境湖北省协同创新中心(三峡大学), 湖北 宜昌 443002
三峡库区生态环境教育部工程研究中心(三峡大学), 湖北 宜昌 443002 | | | 李晓玲 | 三峡地区地质灾害与生态环境湖北省协同创新中心(三峡大学), 湖北 宜昌 443002
三峡库区生态环境教育部工程研究中心(三峡大学), 湖北 宜昌 443002 | | | 罗玉红 | 三峡大学水利与环境学院, 湖北 宜昌 443002
三峡地区地质灾害与生态环境湖北省协同创新中心(三峡大学), 湖北 宜昌 443002
三峡库区生态环境教育部工程研究中心(三峡大学), 湖北 宜昌 443002 | | | 戴泽龙 | 三峡地区地质灾害与生态环境湖北省协同创新中心(三峡大学), 湖北 宜昌 443002
三峡库区生态环境教育部工程研究中心(三峡大学), 湖北 宜昌 443002 | | | 胥焘 | 三峡地区地质灾害与生态环境湖北省协同创新中心(三峡大学), 湖北 宜昌 443002
三峡库区生态环境教育部工程研究中心(三峡大学), 湖北 宜昌 443002 | | | 黄应平 | 三峡大学水利与环境学院, 湖北 宜昌 443002
三峡地区地质灾害与生态环境湖北省协同创新中心(三峡大学), 湖北 宜昌 443002
三峡库区生态环境教育部工程研究中心(三峡大学), 湖北 宜昌 443002 | huangyp@ctgu.edu.cn |
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| 中文摘要: |
| 于2014年在宜昌近郊污水排放区的周边菜地取水芹样品及其根际土样,对其重金属(Cu、Pb和Cd)含量进行了测定,同时应用单项污染指数法和综合污染指数法分析了土壤和水芹的重金属污染现状,采用目标危险系数(THQ)方法对污灌区周围人群食用蔬菜的健康风险进行了评价。结果表明:土壤中Cu和Pb在各个样点的含量均低于《土壤环境质量标准》(GB 15618—1995)二级限值,但土壤中Cd超标,且为中-重污染等级;水芹中Cu、Pb和Cd均超过《农产品安全质量无公害蔬菜安全要求》(GB 18406.1—2001)的限值,其中Pb和Cd均为重度污染,Cu为警戒-轻度污染。仅通过消耗水芹,污灌区周边成人平均每天摄入Cu、Pb、Cd的量分别为1456、127、99 μg·d-1,儿童平均每天摄入Cu、Pb、Cd的量分别为1118、97、76 μg·d-1,THQ评价表明,该区域成人和儿童摄入Cd的目标危险系数均大于1,存在健康风险。随着人们对于蔬菜消耗的剧增,各类重金属对人体产生的健康风险值将逐步增加,对人体健康产生的危害更大,故建议减少食用该地区种植的蔬菜。 |
| 英文摘要: |
| Sewage irrigation has caused heavy metal pollution in suburban soils. In this study, samples of Oenanthe javanica DC. and its rhizosphere soils were collected from vegetable farms irrigated with wastewater in the suburbs of Yichang in 2014. The content of heavy metals(Cu, Pb and Cd) in plants and soils was determined. Single quality index and complex quality index were used to evaluate heavy metal pollution in both plant and soil, and the Target Hazard Quotient(THQ) was employed to assess the health risk of O. javanica for local inhabitants through food chain transfer. The concentrations of Cu and Pb in soil samples were lower than the Environmental Quality Standard for Soils(GB 15618—1995). However, Cd concentrations in soils exceeded the Standard, which was at medium-heavy pollution levels. The heavy meals in all O. javanica samples did exceed their respective limits specified in Safety Qualification for Agricultural Product—Safety Requirements for Non-environmental Pollution Vegetable(GB 18406.1—2001), and were at alert level or slight pollution level. The daily intakes(DI) of Cu, Pb, and Cd via consumption of O. javanica from wastewater irrigated soils were 1456, 127, and 99 μg·d-1 for adults and 1118, 97, and 76 μg·d-1 for children, respectively. The THQ values of Cd for both adults and children living in this area were higher than 1, indicating the potential health risk of O. javanica from these areas. Our results suggested that it is imperative to control the pollution of heavy metals in sewage irrigated area. |
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