Advance in washing technology for remediation of heavy metal contaminated soils: effects of eluants and washing conditions

SUN Tao; LU Kouping; WANG Hailong

doi:10.11833/j.issn.2095-0756.2015.01.021

Volume 32 Issue 1

Jan. 2015

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SUN Tao, LU Kouping, WANG Hailong. Advance in washing technology for remediation of heavy metal contaminated soils: effects of eluants and washing conditions[J]. Journal of Zhejiang A&F University, 2015, 32(1): 140-149. doi: 10.11833/j.issn.2095-0756.2015.01.021

Citation:

SUN Tao, LU Kouping, WANG Hailong. Advance in washing technology for remediation of heavy metal contaminated soils: effects of eluants and washing conditions[J]. Journal of Zhejiang A&F University, 2015, 32(1): 140-149. doi: 10.11833/j.issn.2095-0756.2015.01.021

Advance in washing technology for remediation of heavy metal contaminated soils: effects of eluants and washing conditions

doi: 10.11833/j.issn.2095-0756.2015.01.021

SUN Tao^1,2,
LU Kouping^1,2,
WANG Hailong^{1,2
,
,}

1.
Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration，Zhejiang A & F University, Lin’an 311300，Zhejiang，China;
2.
School of Environmental and Resource Sciences，Zhejiang A & F University, Lin’an 311300，Zhejiang，China

Received Date: 2014-03-19
Rev Recd Date: 2014-06-05
Publish Date: 2015-02-20

Abstract

As an effective technology for rapid remediation of soils highly contaminated with heavy metals, soil washing has increasingly received attention in recent years. This paper provides an overview on recent advances in research on the efficacy of various eluants and washing conditions associated with the washing technology for remediation of soils contaminated with heavy metals. Effect of eluants on washing efficiency of various fractions of heavy metals in soils, and the treatment and reuse of the spent washing solutions were discussed. How to treat and recycle waste washing solutions after soil being washed was discussed as well. Among the eluants applied in the global remediation practices, natural organic acids have been recognized as the most promising chemicals for soil washing, because of their low ecotoxicity and high biodegradability which have been considered as important criteria for eluants selection. Regardless of the eluant type, heavy metals in exchangeable and carbonate fraction are most likely to be removed, whereas those in residual fraction are relatively stable and difficult to be removed with soil washing. Directions for further research were also proposed to advance soil washing technology. ［Ch, 4 tab. 70 ref.］
- soil science,
- heavy metal contamination,
- soil remediation,
- review,
- soil washing,
- soil contamination,
- bioavailability

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Advance in washing technology for remediation of heavy metal contaminated soils: effects of eluants and washing conditions

1. Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration，Zhejiang A & F University, Lin’an 311300，Zhejiang，China;

2. School of Environmental and Resource Sciences，Zhejiang A & F University, Lin’an 311300，Zhejiang，China

Received Date: 2014-03-19

Rev Recd Date: 2014-06-05

Publish Date: 2015-02-20

Key words:

Abstract: As an effective technology for rapid remediation of soils highly contaminated with heavy metals, soil washing has increasingly received attention in recent years. This paper provides an overview on recent advances in research on the efficacy of various eluants and washing conditions associated with the washing technology for remediation of soils contaminated with heavy metals. Effect of eluants on washing efficiency of various fractions of heavy metals in soils, and the treatment and reuse of the spent washing solutions were discussed. How to treat and recycle waste washing solutions after soil being washed was discussed as well. Among the eluants applied in the global remediation practices, natural organic acids have been recognized as the most promising chemicals for soil washing, because of their low ecotoxicity and high biodegradability which have been considered as important criteria for eluants selection. Regardless of the eluant type, heavy metals in exchangeable and carbonate fraction are most likely to be removed, whereas those in residual fraction are relatively stable and difficult to be removed with soil washing. Directions for further research were also proposed to advance soil washing technology. ［Ch, 4 tab. 70 ref.］

Advance in washing technology for remediation of heavy metal contaminated soils: effects of eluants and washing conditions

doi: 10.11833/j.issn.2095-0756.2015.01.021

Abstract

References

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通讯作者: 陈斌, bchen63@163.com

Related

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