Publication: Use of rice husk ash as an admixture to remove chromium from a tannery waste
Issued Date
2011-09-01
Resource Type
ISSN
15732932
00496979
00496979
Other identifier(s)
2-s2.0-80052289276
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Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Water, Air, and Soil Pollution. Vol.220, No.1-4 (2011), 81-88
Suggested Citation
Prayoon Fongsatitkul, Panagiotis Elefsiniotis, Duangta Kitkaew, Chaiwat Rungsipanodorn Use of rice husk ash as an admixture to remove chromium from a tannery waste. Water, Air, and Soil Pollution. Vol.220, No.1-4 (2011), 81-88. doi:10.1007/s11270-010-0736-y Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/11915
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Title
Use of rice husk ash as an admixture to remove chromium from a tannery waste
Abstract
This laboratory-scale study explored the use of rice husk ash (RHA) as an admixture to stabilize and solidify the waste sludge from a chrome-tanning process. Various ratios of RHA and tannery sludge were used, ranging from 0.25 to 1.0 by weight of the cement content, resulting in an experimental matrix of 16 runs. It was observed that although the compressive strength of solidified sludge improved at longer curing times, the increase was moderate after 7 days of curing. In addition, higher RHA and/or sludge ratios progressively reduced the strength of the samples. On the other hand, curing time had a positive effect on chromium leachability since the leaching concentration decreased considerably with an increase in curing time, up to 28 days. Furthermore, both the RHA and/or sludge content affected leachability, producing acceptable results, from a Thai regulatory perspective, at ratios of 0.50 or lower. Finally, the solidified sludge can be disposed of in a secure landfill and/or used as a construction material in a number of applications. © 2010 Springer Science+Business Media B.V.