Determination of solid waste sorption capacity for selected heavy metals in landfills

Determination of solid waste sorption capacity for selected heavy metals in landfills

The adsorption process is largely a surface-action phenomenon. In this study, sorption capacities for heavy metals on a solid waste matrix were investigated. Five heavy metals (iron, copper, zinc, nickel and cadmium) were chosen because of their availability in any landfill site. The conditions duri...

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Bibliographic Details
Published in:Journal of hazardous materials Vol. 121; no. 1; pp. 223 - 232
Main Authors: Suna Erses, A., Fazal, Mohammad A., Onay, Turgut T., Craig, William H.
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 20-05-2005
Elsevier
Subjects:
Adsorption
Adsorption isotherm
Applied sciences
Chemical engineering
Equilibrium time
Exact sciences and technology
Freundlich isotherm
General treatment and storage processes
Heavy metals
Industrial Waste - prevention & control
Landfill
Langmuir isotherm
Metals, Heavy - chemistry
Models, Chemical
Pollution
Refuse Disposal - methods
Solid waste
Sorption
Wastes
Sorption
Equilibrium time
Landfill
Adsorption isotherm
Freundlich isotherm
Solid waste
Heavy metals
Langmuir isotherm
Availability
Waste dumping
In situ
Metal ion
Heavy metal
Adsorption
pH
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Summary:The adsorption process is largely a surface-action phenomenon. In this study, sorption capacities for heavy metals on a solid waste matrix were investigated. Five heavy metals (iron, copper, zinc, nickel and cadmium) were chosen because of their availability in any landfill site. The conditions during all the experimental runs were pH 7.0, temperature 32 °C and suppressed microbial degradation. For adsorption isotherm (Freundlich and Langmuir) calculations, fixed quantities of heavy metal ions were mixed with variable quantities of solid waste. The ratio of mass of adsorbate per unit mass of adsorbent was changed five times, by changing only the adsorbent amount. The results showed that the time required to reach equilibrium varied from metal to metal but all reached equilibrium within the first 32 h. The relative potential of sorption of the individual metals and mixed metals on the solid waste matrix is Fe > Zn > Cu > Ni > Cd. The sorption capacity of domestic solid waste matrix for heavy metals is quite significant and this property might prove helpful for the in situ removal of heavy metals in landfill operation.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2005.02.011