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Removal of Heavy Metals from Landfill Leachate Using Municipal Solid Waste Incineration Fly Ash as Adsorbent
To study the adsorption effect of municipal solid waste incineration (MSWI) fly ash on removal of heavy metals from landfill leachate, batch tests were performed to study the effects of MSWI fly ash dosage, pH of leachate, and reaction time on adsorption. The adsorption mechanism of MSWI fly ash to heavy metals was analyzed through scanning electron microscope and X‐ray diffraction tests. With fly ash dosage of 10 g/L, leachate pH 9, and reaction time of 60 min, the removal rate of Zn, Pb, Cr, Cd, and Cu in the leachate reached 39.42, 59.24, 28.14, 55.37, and 32.82%, respectively. The pseudo first‐order kinetic equation could well fit the adsorption kinetic process. The adsorption mechanisms of MSWI fly ash to heavy metals in the leachate mainly included ion exchange adsorption, electrostatic adsorption, and chemical fixation.
Removal of Heavy Metals from Landfill Leachate Using Municipal Solid Waste Incineration Fly Ash as Adsorbent
To study the adsorption effect of municipal solid waste incineration (MSWI) fly ash on removal of heavy metals from landfill leachate, batch tests were performed to study the effects of MSWI fly ash dosage, pH of leachate, and reaction time on adsorption. The adsorption mechanism of MSWI fly ash to heavy metals was analyzed through scanning electron microscope and X‐ray diffraction tests. With fly ash dosage of 10 g/L, leachate pH 9, and reaction time of 60 min, the removal rate of Zn, Pb, Cr, Cd, and Cu in the leachate reached 39.42, 59.24, 28.14, 55.37, and 32.82%, respectively. The pseudo first‐order kinetic equation could well fit the adsorption kinetic process. The adsorption mechanisms of MSWI fly ash to heavy metals in the leachate mainly included ion exchange adsorption, electrostatic adsorption, and chemical fixation.
Removal of Heavy Metals from Landfill Leachate Using Municipal Solid Waste Incineration Fly Ash as Adsorbent
Xue, Qiang (author) / Li, Jiang‐Shan (author) / Wang, Ping (author) / Liu, Lei (author) / Li, Zhen‐Ze (author)
CLEAN – Soil, Air, Water ; 42 ; 1626-1631
2014-11-01
6 pages
Article (Journal)
Electronic Resource
English
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