Effects of chemical amendment on heavy metal leachability and bioavailability of an acidic mine water-contaminated soil and growth of a vegetable

Lin, Chuxia and Lu, Wenzhou and Liu, Yong and Ma, Yingqun and Wan, Fengxian and Chen, Aisheng (2010) Effects of chemical amendment on heavy metal leachability and bioavailability of an acidic mine water-contaminated soil and growth of a vegetable. In: WCSS 2010: Soil Solutions for a Changing World, 1-6 Aug 2010, Brisbane, Australia.

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Abstract

A pot experiment was conducted to examine the effects of acid neutralization treatment of a mine waterpolluted soil on the leachability and bioavailability of the heavy metals in the soil, as well as the growth of a vegetable using the treated soils as growth media. The results show that the leachability of the soil-borne heavy metals can be effectively reduced after application of lime and red mud (pH 11.58, acid-neutralizing capacity of about 10 mole/kg). The amount of heavy metals extracted by the plant differed significantly among the different treatments despite that the soluble forms of the metals were consistently low or nondetectable for various treatments. This indicates that non-soluble heavy metal pools were more important sources for heavy metal uptake by the plant. The bioavailability of the heavy metals was not dependent on soil pH, at least for Cu, Zn and Cd. Soil pH might have certain effects on the uptake of Pb by the plant. The growth performance of the vegetable was significantly affected by the amount of red mud added to the soil,which does not appear to be related to soil pH conditions and heavy metal toxicity


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Authors retain copyright. Published on DVD.
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Sciences - No Department
Date Deposited: 22 Mar 2011 02:13
Last Modified: 03 Jul 2013 00:34
Uncontrolled Keywords: chemical amendment; heavy metal; metal mobility; soil contamination; acid mine drainage
Fields of Research (FOR2008): 05 Environmental Sciences > 0503 Soil Sciences > 050304 Soil Chemistry (excl. Carbon Sequestration Science)
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070303 Crop and Pasture Biochemistry and Physiology
05 Environmental Sciences > 0503 Soil Sciences > 050302 Land Capability and Soil Degradation
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9614 Soils > 961404 Mining Soils
URI: http://eprints.usq.edu.au/id/eprint/18721

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