Remediation of metal contaminated soil with mineral-amended composts

被引：173

作者：

van Herwijnen, Rene ^{[1
,2
,3
,4
]}

Hutchings, Tony R. ^{[2
]}

Ai-Tabbaa, Abir ^{[3
]}

Moffat, Andy J. ^{[2
]}

Johns, Mike L. ^{[4
]}

Ouki, Sabeha K. ^{[1
]}

机构：

[1] Univ Surrey, Sch Engn, Surrey GU2 7XH, England

[2] Forest Res Land Regenerat & Urban Greening Grp, Farnham GU10 4LH, Surrey, England

[3] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England

[4] Univ Cambridge, Dept Chem Engn, Cambridge CB2 3RA, England

来源：

ENVIRONMENTAL POLLUTION | 2007年 / 150卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

leaching test; bentonite; zeolite; heavy metals; trace elements; ryegrass;

D O I：

10.1016/j.envpol.2007.01.023

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study examined the use of two composts derived from green waste and sewage sludge, amended with minerals (clinoptilolite or bentonite), for the remediation of metal-contaminated brownfield sites to transform them into greenspace. Soils contaminated with high or low levels of metals were mixed with the mineral-enhanced composts at different ratios and assessed by leaching tests, biomass production and metal accumulation of ryegrass (Lolium perenne L.). The results showed that the green waste compost reduced the leaching of Cd and Zn up to 48% whereas the composted sewage sludge doubled the leachate concentration of Zn. However, the same soil amended with composted sewage sludge showed an efficient reduction in plant concentrations of Cd, Cu, Pb or Zn by up to 80%. The results suggest that metal immobilisation and bioavailability are governed by the formation of complexes between the metals and organic matter. The amendment with minerals had only limited effects. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：347 / 354

页数：8

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