我国南方四省集中连片水稻田土壤重金属污染评估研究

发布时间：2018-03-09 22:37

本文选题：水稻田　切入点：土壤重金属　出处：《环境科学学报》2017年04期 　论文类型：期刊论文

【摘要】：以2013—2014年南方湖南、江西、浙江、福建四省集中连片水稻田的63个采样数据为基础,利用单因子评价法和内梅罗指数评估南方水稻田土壤重金属的污染情况.结果表明:南方集中连片水稻田土壤Cd点位超标率为0;Hg、As和Ni 3种重金属含量超出《土壤环境质量标准》(GB15618-1995)二级标准的比例最大,分别为6.3%、4.8%和7.9%;研究区水稻田土壤重金属以清洁为主,70%以上符合农业生产和生活要求,但少量样点Hg为中度和轻度污染,As和Ni为轻度污染;从内梅罗综合指数看,研究区土壤重金属仅有3.18%和1.59%的为轻度污染和中度污染,主要分布在湖南和江西.
[Abstract]:Based on 63 samples collected from four provinces of southern Hunan, Jiangxi, Zhejiang and Fujian in 2013-2014, The single factor evaluation method and Nemero index were used to evaluate the contamination of heavy metals in paddy soil of southern China. The results showed that the exceeding rate of CD in the soil of southern concentrated continuous paddy field was 0 ~ (10) H _ (g) as and Ni _ (3) over < soil]. Environmental quality standard (GB15618-1995) the proportion of the second class standard is the largest, More than 70% of the heavy metals in paddy soils in the study area met the requirements of agricultural production and living, but a small amount of Hg was moderately and mildly polluted, and as and Ni were slightly polluted. Only 3.18% and 1.59% of the heavy metals in the soil of the study area were mildly and moderately polluted, mainly distributed in Hunan and Jiangxi provinces.
【作者单位】：中国科学院地理科学与资源研究所陆地表层格局与模拟重点实验室;中国科学院大学;中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室;
【基金】：国家科技支撑计划项目(No.2014BAC15B03) 中国工程院咨询研究项目(No.2016-ZD-10-02)~~
【分类号】：X53

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