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Field trials to assess the use of iron-bearing industrial by-products for stabilisation of chromated copper arsenate-contaminated soil
Umeå University, Faculty of Science and Technology, Chemistry.
2007 (English)In: Science of The Total Environment, Vol. 387, no 1-3, 68-78 p.Article in journal (Refereed) Published
Abstract [en]

Two industrial by-products with high iron contents were tested for their effectiveness in the stabilisation of arsenic and trace metals in chromated copper arsenate (CCA)-contaminated soil. Steel abrasive (SA; 97% Fe0) and oxygen scarfing granulate (OSG; 69% Fe3O4) were applied at levels of 1% and 8% (w/w) respectively to two soils with different organic matter contents. Field lysimeter measurements indicated that SA and OSG treatments decreased the arsenic concentration in pore water by 68% and 92%, respectively, for the soil with low organic matter content, and by about 30% in pore water of soil with high organic matter content. At pH ≤ 6, the amended soil with low organic content contained elevated levels of manganese and nickel in their pore water, which were sufficient to induce cytotoxic effects in L-929 mouse fibroblast cells. The industrial by-products have significant potential for soil amendment at field-scale, but caution is required because of the potential release of their chemical contaminants and their reduced capacity for sorption of arsenic in organic-rich soils.

Place, publisher, year, edition, pages
2007. Vol. 387, no 1-3, 68-78 p.
Keyword [en]
Remediation, Iron oxides, CCA, Arsenic, Leaching, Toxicity
URN: urn:nbn:se:umu:diva-16385DOI: doi:10.1016/j.scitotenv.2007.07.018OAI: diva2:156058
Available from: 2007-09-24 Created: 2007-09-24 Last updated: 2011-01-11Bibliographically approved

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