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首页> 外文期刊>Environmental Pollution >Accumulation, ecological-health risks assessment, and source apportionment of heavy metals in paddy soils: A case study in Hanzhong, Shaanxi, China
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Accumulation, ecological-health risks assessment, and source apportionment of heavy metals in paddy soils: A case study in Hanzhong, Shaanxi, China

机译：稻田土壤中重金属的积累，生态健康风险评估，以及陕西汉中的案例研究

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摘要

Contamination of agricultural soil by heavy metals has become a global issue concerning food security and human health risk. In this study, a soil investigation was conducted to evaluate metals accumulation, potential ecological and health risks as well as to identify sources of metals in paddy soils in Hanzhong City, which is located in a sedimentary basin. Ninety-two (92) surface soil samples (bulk soil) and their corresponding rice samples, 21 irrigation water samples, and 18 fertilizer samples were collected from two typical counties and quantified for the heavy metals (i.e., As, Cd, Cu, Hg, Pb, and Zn) concentrations. The results showed that As, Cd, and Zn were the main contaminants in soils in the studied area. Additionally, elevated Hg content in soils might also pose risks to the local ecosystem. Cadmium and As demonstrated high mobility, and their average contents in rice grains were slightly higher than the permissible threshold (0.20 mg kg(-1)). Moreover, Pb, As, and Cd intake via rice consumption might result in potential risks to local residents. Metal distribution revealed that pollution in the studied area is non homogeneous, and agricultural activities (As, Cu, and Cd), transportation emission (Cu and Pb), coal combustion (Hg and As), and smelting activities (Zn, Pb, and Cu) were ascertained as the potential sources based on the Positive matrix factorization (PMF) analysis results. (C) 2019 Published by Elsevier Ltd.
机译：通过重金属污染农业土壤已成为粮食安全和人类健康风险的全球问题。在这项研究中，进行了土壤调查，以评估金属积累，潜在的生态和健康风险，并确定汉中市水稻土的金属来源，位于沉积盆地。从两个典型的县中收集92（92）表面土样品（散装土壤）及其相应的水稻样品和21个灌溉水样和18个肥模，并为重金属定量（即，如CD，Cu，Hg ，pb和zn）浓度。结果表明，如CD，Zn都是研究区土壤中的主要污染物。此外，土壤中的Hg含量升高可能对当地生态系统构成风险。镉和正如所示的高迁移率，并且水稻晶粒的平均内容物略高于允许阈值（0.20mg kg（-1））。此外，通过稻米消费的Pb，如CD摄入量可能会导致当地居民的潜在风险。金属分布显示研究中的污染是非均匀的，农业活动（AS，Cu和Cd），运输排放（Cu和Pb），煤燃烧（Hg和As）和冶炼活动（Zn，Pb和基于阳性基质分子（PMF）分析结果，确定Cu）作为潜在来源。 （c）2019年由elestvier有限公司发布

著录项

  • 来源
    《Environmental Pollution》 |2019年第5期|349-357|共9页
  • 作者

    Xiao Ran; Guo Di; Ali Amjad; Mi Shenshen; Liu Tao; Ren Chunyan; Li Ronghua; Zhang Zengqiang;

  • 作者单位

    Northwest A&F Univ Coll Nat Resources & Environm Yangling 712100 Shaanxi Peoples R China;

    Northwest A&F Univ Coll Nat Resources & Environm Yangling 712100 Shaanxi Peoples R China;

    Northwest A&F Univ Coll Nat Resources & Environm Yangling 712100 Shaanxi Peoples R China;

    Northwest A&F Univ Coll Nat Resources & Environm Yangling 712100 Shaanxi Peoples R China;

    Northwest A&F Univ Coll Nat Resources & Environm Yangling 712100 Shaanxi Peoples R China;

    Northwest A&F Univ Coll Nat Resources & Environm Yangling 712100 Shaanxi Peoples R China;

    Northwest A&F Univ Coll Nat Resources & Environm Yangling 712100 Shaanxi Peoples R China;

    Northwest A&F Univ Coll Nat Resources & Environm Yangling 712100 Shaanxi 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; Risk assessment; Source apportionment; Positive matrix factorization; Paddy soils;

    机译：重金属;风险评估;源分配;正矩阵分解;水稻土;

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