Impact of the uncontrolled leakage of leachate from a municipal solid waste landfill on soil in a cultivated-calcareous environment.
Impact of the uncontrolled leakage of leachate from a municipal solid waste landfill on soil in a cultivated-calcareous environment.
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DOI：
10.1016/j.wasman.2018.10.013
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发表时间：
2018-10
期刊：
影响因子：
8.1
通讯作者：
S. Rezapour;A. Samadi;I. Kalavrouziotis;N. Ghaemian
中科院分区：
文献类型：
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作者：
S. Rezapour;A. Samadi;I. Kalavrouziotis;N. Ghaemian
垃圾渗滤液中的重金属污染因其可能通过食物链影响人类健康而日益受到关注。在本研究中，重金属（锌，铜，镉，铅，镍）的积累和潜在的健康风险的石灰性土壤-小麦系统的垃圾渗滤液的影响。结果表明，土壤中有效态和全量重金属的富集程度依次为Zn > Pb > Ni > Cd > Cu和Cd > Zn > Ni > Pb > Cu。然而，只有镉含量超过标准水平。各人群的平均危害商数（HQ）均小于1，表明当地居民无非致癌性健康风险; 0-5岁和6-18岁人群的平均危害指数（HI）分别为2.3和1.1，表明两个人群均存在中度非致癌性健康风险。Cd和Pb对HI的贡献最大，其次是Cu、Zn和Ni。镉的致癌健康风险范围为1 × 10− 5 ~ 1 × 10−6，在接触小麦的不同人群中均表现出较低的潜在风险，其大小顺序为成年人> 6-18岁人群> 0-5岁人群。研究结果可用于环境条件类似的区域，为地方和国家宏观系统管理人员设计适当战略管理这些农业生态系统提供了宝贵的基准。
The heavy metal pollution generated by landfill leachate becomes increasingly concerning due to its potential to impact human health through the food chain. In the present study, the accumulation and potential health risk of heavy metals (Zn, Cu, Cd, Pb, and Ni) were investigated in a calcareous soil -wheat system affected by an uncontrolled landfill leachate. The results showed soils were significantly enriched by both the available and total fractions of the metals in the sequences of Zn > Pb > Ni > Cd > Cu and Cd > Zn > Ni > Pb > Cu, respectively. Nevertheless, only the Cd content exceeded the standard levels. For the various population groups, the mean hazard quotient (HQ) was lower than the unity, implying a lack of non-carcinogenic health risk for the local residents, while the average hazard index (HI) was 2.3 and 1.1 for people aged 0–5 and 6–18 years, respectively, illustrating a moderate non-carcinogenic health risk for the two groups. Cd and Pb contributed the most to HI, followed by Cu, Zn, and Ni. In addition, the carcinogenic health risk of Cd, ranging from 1 × 10−5to 1 × 10−6, showed a low potential risk in the different population groups exposed to wheat grains and decreased in the sequence of adult > population 6–18 years > population 0–5 years. The findings of the study, which can be used in regions under similar environmental conditions, provide a valuable benchmark for the design of appropriate strategies to manage these agroecosystems by both local and national managers of such macrosystems.