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  • Application of manures to mitigate the harmful effects of electrokinetic remediation of heavy metals on soil microbial properties in polluted soils

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    TahmasbianPUB4475.pdf (437.7Kb)
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    Author(s)
    Tahmasbian, Iman
    Sinegani, Ali Akbar Safari
    Thi, Thu Nhan Nguyen
    Che, Rongxiao
    Phan, Thuc D
    Bai, Shahla Hosseini
    Griffith University Author(s)
    Hosseini-Bai, Shahla
    Year published
    2017
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    Abstract
    Ethylenediaminetetraacetic acid (EDTA) used with electrokinetic (EK) to remediate heavy metal-polluted soils is a toxic chelate for soil microorganisms. Therefore, this study aimed to evaluate the effects of alternative organic chelates to EDTA on improving the microbial properties of a heavy metal-polluted soil subjected to EK. Cow manure extract (CME), poultry manure extract (PME) and EDTA were applied to a lead (Pb) and zinc (Zn)-polluted calcareous soil which were subjected to two electric intensities (1.1 and 3.3 v/cm). Soil carbon pools, microbial activity, microbial abundance (e.g., fungal, actinomycetes and bacterial ...
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    Ethylenediaminetetraacetic acid (EDTA) used with electrokinetic (EK) to remediate heavy metal-polluted soils is a toxic chelate for soil microorganisms. Therefore, this study aimed to evaluate the effects of alternative organic chelates to EDTA on improving the microbial properties of a heavy metal-polluted soil subjected to EK. Cow manure extract (CME), poultry manure extract (PME) and EDTA were applied to a lead (Pb) and zinc (Zn)-polluted calcareous soil which were subjected to two electric intensities (1.1 and 3.3 v/cm). Soil carbon pools, microbial activity, microbial abundance (e.g., fungal, actinomycetes and bacterial abundances) and diethylenetriaminepentaacetic acid (DTPA)-extractable Pb and Zn (available forms) were assessed in both cathodic and anodic soils. Applying the EK to soil decreased all the microbial variables in the cathodic and anodic soils in the absence or presence of chelates. Both CME and PME applied with two electric intensities decreased the negative effect of EK on soil microbial variables. The lowest values of soil microbial variables were observed when EK was combined with EDTA. The following order was observed in values of soil microbial variables after treating with EK and chelates: EK + CME or EK + PME > EK > EK + EDTA. The CME and PME could increase the concentrations of available Pb and Zn, although the increase was less than that of EDTA. Overall, despite increasing soil available Pb and Zn, the combination of EK with manures (CME or PME) mitigated the negative effects of using EK on soil microbial properties. This study suggested that the synthetic chelates such as EDTA could be replaced with manures to alleviate the environmental risks of EK application.
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    Journal Title
    Environmental Science and Pollution Research
    Volume
    24
    Issue
    34
    DOI
    https://doi.org/10.1007/s11356-017-0281-y
    Copyright Statement
    © 2017 Springer-Verlag. This is an electronic version of an article published in Environmental Science and Pollution Research (ESPR), Volume 24, Issue 34, pp 26485–26496, 2017. Environmental Science and Pollution Research (ESPR) is available online at: http://link.springer.com// with the open URL of your article.
    Subject
    Chemical sciences
    Environmental sciences
    Soil sciences not elsewhere classified
    Biological sciences
    Publication URI
    http://hdl.handle.net/10072/368885
    Collection
    • Journal articles

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