Efficiency of GAC for Treatment of Leachate from Soil Washing Process View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1999-12

AUTHORS

S. A. Wasay, S. Barrington, S. Tokunaga

ABSTRACT

Granular activated carbon (GAC), granular activated alumina (GAA) and a ferric chloride solution (FCS) were tested for the treatment of leachate contaminated by heavy metals. The leachate was collected following the remedation of soils using weak organic acids and/or their salts, EDTA and DTPA. Only GAC was found to effectively remove heavy metals (Cd, Cu, Cr, Hg, Mn, Pb and Zn as chelates) from the leachate. At optimum pH ranging from 5.4 to 6.9, 97% of Hg was removed while at optimum pH ranging from 6.9 to 7.7, 78 to 96% of Cd, Cu, Mn, Pb and Zn were removed. Some 77% of the Cr was removed at optimum pH of 5.4. Adsorption rate constant and Langmuir adsorption capacity of GAC were found to be 0.01 min−1 and 19 mg metal chelate g−1 of GAC, respectively. Freundlich constants, k and n were found to be 21 mg g−1 and 2.778, respectively. The brown color of the leachate turned colorless after GAC treatment. More... »

PAGES

449-460

References to SciGraph publications

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URI

http://scigraph.springernature.com/pub.10.1023/a:1005115820429

DOI

http://dx.doi.org/10.1023/a:1005115820429

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https://app.dimensions.ai/details/publication/pub.1046852396


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