广州市从化区耕地土壤重金属风险评价

doi:10.16088/j.issn.1001-6600.2020.05.015

广西师范大学学报（自然科学版） ›› 2020, Vol. 38 ›› Issue (5): 118-129.doi: 10.16088/j.issn.1001-6600.2020.05.015

• • 上一篇

广州市从化区耕地土壤重金属风险评价

彭丽梅^1,2,3,4, 赵理^1,2,3,4,5, 周悟^1,2,3,4,5, 胡月明^{1,2,3,4,5,6,7*}

1.华南农业大学资源环境学院,广东广州510642;
2.自然资源部建设用地再开发重点实验室,广东广州510642;
3.广东省土地利用与整治重点实验室, 广东广州510642;
4.广东省土地信息工程技术研究中心, 广东广州510642;
5.广州市华南自然资源科学技术研究院, 广东广州510642;
6.青海大学省部共建三江源生态与高原农牧业国家重点实验室, 青海西宁810016;
7.电子科技大学资源环境学院,四川成都610054

收稿日期:2019-07-19 出版日期:2020-09-25 发布日期:2020-10-09
通讯作者: 胡月明(1964—), 男, 湖南益阳人, 华南农业大学教授, 博导。E-mail: ymhu163@163.com
基金资助:
国家重点研发计划(2016YFD0800301); 广州市科技计划(201807010048)

Risk Assessment of Heavy Metals in Cultivated Land in Conghua District of Guangzhou City, China

PENG Limei^1,2,3,4, ZHAO Li^1,2,3,4,5, ZHOU Wu^1,2,3,4,5, HU Yueming^{1,2,3,4,5,6,7*}

1. College of Natural Resources and Environment, South China Agricultural University, Guangzhou Guangdong 510642, China;
2. Key Laboratory of Land Redevelopment of Ministry of Land and Resources, Guangzhou Guangdong 510642, China;
3. Guangdong Province Key Laboratory for Land Use and Consolidation, Guangzhou Guangdong 510642, China;
4. Guangdong Province Engineering Research Center for Land Information Technology, Guangzhou Guangdong 510642, China;
5. South China Academy of Natural Resources, Guangzhou Guangdong 510642, China;
6. State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining Qinghai 810016, China;
7. College of Resources and Environment, Electronic Science and Technology University, Chengdu Sichuan, 610054,China

Received:2019-07-19 Online:2020-09-25 Published:2020-10-09

摘要/Abstract

摘要： 土壤是环境的重要组成部分,过量的重金属进入土壤圈,不仅会导致土壤质量下降,土壤生产力和粮食安全降低,更会对人类健康造成影响。本文以广州市从化区76个采样点为基础,采用Hakanson潜在生态风险指数及健康风险评价方法,对耕地土壤5种重金属镉(Cd)、汞(Hg)、砷(As)、铅(Pb)和铬(Cr)进行风险评价,得到各重金属含量由大到小依次为:Cr(78.690±38.160 mg·kg^-1)、Pb(54.300±18.120 mg·kg^-1)、As(10.280±7.230mg·kg^-1)、Hg(0.163±0.050 mg·kg^-1)、Cd(0.160±0.050mg·kg^-1)。同时得到土壤潜在生态风险贡献率由大到小顺序为:Cd、Hg、As、Pb、Cr。结果显示:重金属Cd和Hg潜在生态风险指数处于中等和较高生态风险水平,其他3种重金属都处于轻微生态风险水平,综合潜在生态风险指数处于中等生态风险水平;非致癌风险主要来自重金属Cr,其中儿童的多途径非致癌总风险是成人的7倍左右;重金属As和Cd致癌总风险为1.997×10^-3,存在致癌风险。研究表明广州市从化区耕地土壤重金属存在一定的污染风险,在实际生产生活中应加强相应防范和控制措施。

关键词: 耕地土壤, 重金属, 潜在生态风险评价, 健康风险评价, 广州市从化区

Abstract: Soil is an important part of the environment. Excessive heavy metals entering the soil cycle will not only lead to the decline of soil quality, soil productivity and food security, but also affect human health. Based on 76 sampling sites in Conghua District of Guangzhou city, the risk assessment of five heavy metals Cd, Hg, As, Pb and Cr in cultivated soil was carried out by using Hakanson potential ecological risk index and health risk assessment method. The results showed that the content of each heavy metal was in the order as follow: Cr(78.690±38.160 mg·kg^-1), Pb(54.300±18.120 mg·kg^-1), As(10.280±7.230mg·kg^-1), Hg(0.163±0.050 mg·kg^-1), Cd(0.160±0.050mg·kg^-1). The contribution rate to the potential ecological risk of soil is as follow: Cd,Hg,As,Pb,and Cr. The potential ecological risk indexes of heavy metals Cd and Hg were mainly at medium and high ecological risk levels, while the other three heavy metals were all at slight ecological risk levels. The comprehensive potential ecological risk index was mainly at medium ecological risk level. The non-carcinogenic risk mainly comes from heavy metal Cr, among which the total risk of multi-pathway non-carcinogenic in children was about 7 times that of adults. The total carcinogenic risk of heavy metals As and Cd is 1.997×10^-3, and there was a carcinogenic risk. The results showed that there was a certain pollution risk of heavy metals in the cultivated soil of Conghua District, and the corresponding prevention and control measures should be strengthened in the actual production and life.

Key words: the cultivated land, heavy metals, potential ecological risk assessment, health risk assessment, Conghua district, Guangzhou City

中图分类号:

彭丽梅, 赵理, 周悟, 胡月明. 广州市从化区耕地土壤重金属风险评价[J]. 广西师范大学学报（自然科学版）, 2020, 38(5): 118-129.

PENG Limei, ZHAO Li, ZHOU Wu, HU Yueming. Risk Assessment of Heavy Metals in Cultivated Land in Conghua District of Guangzhou City, China[J]. Journal of Guangxi Normal University(Natural Science Edition), 2020, 38(5): 118-129.

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广州市从化区耕地土壤重金属风险评价

Risk Assessment of Heavy Metals in Cultivated Land in Conghua District of Guangzhou City, China

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