Publication: Utilization of pulp and paper industrial wastes to remove heavy metals from metal finishing wastewater
Issued Date
2009-08-01
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ISSN
03014797
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2-s2.0-69449104649
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Environmental Management. Vol.90, No.11 (2009), 3283-3289
Suggested Citation
Suthipong Sthiannopkao, Siranee Sreesai Utilization of pulp and paper industrial wastes to remove heavy metals from metal finishing wastewater. Journal of Environmental Management. Vol.90, No.11 (2009), 3283-3289. doi:10.1016/j.jenvman.2009.05.006 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/27584
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Title
Utilization of pulp and paper industrial wastes to remove heavy metals from metal finishing wastewater
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Abstract
Two pulp and paper industrial wastes, lime mud (LM) and recovery boiler ash (RB), have low moisture contents, low heavy metal contaminations and contain various carbonate compounds which contribute to a high pH. Metal finishing wastewater (MF-WW) has a low pH, high levels of TDS and high contaminations from Cr, Cu, Pb and Zn. The heavy metals from MF-WW were removed by sorption and precipitation mechanisms. LM gave better results in removing heavy metals from MF-WW than RB. At a reaction time of 45 min, the maximum removal efficiencies for Cr (93%) and Cu (99%) were obtained at 110 g L-1of LM, but at 80 g L-1for Pb (96%) and Zn (99%). Treatment with LM gives a higher sludge volume than with RB. However, the leachability of heavy metals from LM is lower. Leachability of heavy metals in the sediment for all selected treatment conditions is within government standards. © 2009 Elsevier Ltd. All rights reserved.