Publication: Use of Power Plant Ash to Remove and Solidify Heavy Metals from a Metal-finishing Wastewater
Issued Date
2009-01-01
Resource Type
ISSN
15732932
00496979
00496979
Other identifier(s)
2-s2.0-84890661699
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Water, Air, and Soil Pollution. Vol.203, No.1-4 (2009), 147-154
Suggested Citation
P. Fongsatitkul, P. Elefsiniotis, N. Khuhasawan, R. Jindal Use of Power Plant Ash to Remove and Solidify Heavy Metals from a Metal-finishing Wastewater. Water, Air, and Soil Pollution. Vol.203, No.1-4 (2009), 147-154. doi:10.1007/s11270-009-9998-7 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/27593
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Use of Power Plant Ash to Remove and Solidify Heavy Metals from a Metal-finishing Wastewater
Author(s)
Other Contributor(s)
Abstract
© 2009, Springer Science+Business Media B.V. All Right Reserved. This laboratory-scale study investigated initially the potential of heavy metal removal from a metal-finishing wastewater using fly and bottom ash from a power plant as coagulants. It was found that the maximum heavy metal content in the ash–sludge mix was obtained at a fly ash-to-bottom ash ratio of 1.5:1 and a stirring time of 3 h, which resulted in heavy metal removal (i.e., Cr, Ni, Cu, Zn, Cd, and Pb) in excess of 99%, with effluent concentrations below the corresponding regulatory standards of Thailand. Furthermore, the feasibility of using fly ash as an admixture to stabilize and solidify the ash–sludge mix generated previously was explored. Results indicated that the stabilization/solidification process can achieve a high level of heavy metal removal efficiency from the ash–sludge mix. The optimum ratio regarding chromium leaching was found to be 1:0.75:0.75 (cement:fly ash:ash–sludge). In addition, the compressive strength and the chromium leaching concentration of the solidified sludge were within acceptable levels for secure landfill disposal and/or use as a construction material.