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首页> 外文期刊>Environmental Pollution >Bioavaiiability and soil-to-crop transfer of heavy metals in farmland soils: A case study in the Pearl River Delta, South China
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Bioavaiiability and soil-to-crop transfer of heavy metals in farmland soils: A case study in the Pearl River Delta, South China

机译：农田土壤中重金属的生物利用度和土壤向作物的迁移：以华南珠江三角洲为例

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摘要

Soil-bound heavy metals are of great concern for human health due to the potential exposure via food chain transfer. In the present study, the occurrence, the bioavailability and the soil-to-crop transfer of heavy metals in farmland soils were investigated based on data from two agricultural areas, i.e. Sihui and Shunde in South China. Six heavy metals (As, Cu, Hg, Mn, Ni and Pb) were quantified in the farmland soils. The mean single pollution level indices (PI) were all lower than 1 except for Hg in soils from Shunde (PI = 1.51 +/- 0.46), suggesting the farmland soils were within clean and slightly polluted by heavy metals. As, Cu, Ni and Pb were found to be mostly present in the non-bioavailable form. The majority of Hg was considered potentially bioavailable, and Mn was found to be largely bioavailable. Soil pH was an important factor influencing bioavailability of soil-bound heavy metals. The concentrations of heavy metals in vegetables from Sihui and Shunde were within the food hygiene standards, while the rice grain from Sihui was polluted by Pb (PI = 10.3 +/- 23.4). Total soil concentrations of heavy metals were not correlated to their corresponding crop concentrations, instead, significant correlations were observed for bioavailable concentrations in soil. The results supported the notion that the bioavailability of the investigated heavy metals in the soil was largely responsible for their crop uptake. The soil-to-crop transfer factors based on bioavailable concentrations suggested that Cu, As and Hg in soils of the study area had greater tendency to be accumulated in the vegetables than other heavy metals, calling for further human health assessment by consuming the contaminated crops. (C) 2017 Elsevier Ltd. All rights reserved.
机译：由于通过食物链转移的潜在暴露，与土壤结合的重金属对人类健康至关重要。在本研究中，根据来自华南四会和顺德两个农业区的数据，研究了农田土壤中重金属的发生，生物利用度和土壤向作物的迁移。在农田土壤中定量了六种重金属（As，Cu，Hg，Mn，Ni和Pb）。除了来自顺德的土壤中的汞（PI = 1.51 +/- 0.46）以外，平均单一污染水平指数（PI）均低于1，这表明农田土壤处于清洁状态，并被重金属轻微污染。 As，Cu，Ni和Pb主要以非生物利用形式存在。汞的大部分被认为是潜在的生物利用度，而锰被发现具有很大的生物利用度。土壤pH是影响结合土壤的重金属生物利用度的重要因素。四会和顺德的蔬菜中的重金属含量均在食品卫生标准之内，而四会的米粒被铅污染（PI = 10.3 +/- 23.4）。土壤中的总重金属浓度与相应的农作物浓度无关，相反，土壤中生物利用度与浓度显着相关。结果支持了这样一种观点，即所研究的土壤中重金属的生物利用度是其作物吸收的主要原因。基于生物利用度的土壤到作物的迁移因子表明，研究区土壤中的铜，砷和汞比其他重金属更容易在蔬菜中积累，需要通过食用受污染的农作物来进一步评估人类健康。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Environmental Pollution》 |2018年第4期|710-719|共10页
  • 作者

    Zhang Jingru; Li Huizhen; Zhou Yongzhang; Dou Lei; Cai Limei; Mo Liping; You Jing;

  • 作者单位

    Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China;

    Jinan Univ, Sch Environm, Guangzhou Key Lab Environm Exposure & Hlth, Guangdong Key Lab Environm Pollut & Hlth, Guangzhou 510632, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China;

    Guangdong Key Labs Geol Proc & Mineral Resources, Guangzhou 510275, Guangdong, Peoples R China;

    Guangdong Key Labs Geol Proc & Mineral Resources, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China;

    Jinan Univ, Sch Environm, Guangzhou Key Lab Environm Exposure & Hlth, Guangdong Key Lab Environm Pollut & Hlth, Guangzhou 510632, Guangdong, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Heavy metals; Farmland soil; Vegetable and rice; Bioavailability; Soil-to-crop transfer factor;

    机译：重金属;农田土壤;蔬菜和水稻;生物利用度;土壤对作物的迁移因子;

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