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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 13, No. 4, 2016, pp. 1123-1130
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Bioline Code: st16105
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 13, No. 4, 2016, pp. 1123-1130
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Adsorption kinetic models for the removal of Cu(II) from aqueous solution by clay liners in landfills
Venkatesan, G. & Rajagopalan, V.
Abstract
Liners are commonly used in engineered waste
disposal landfill to minimize the potential contamination of
the aquatic environment. The adsorption behavior of Cu(II)
from aqueous solution onto clay admixed with various mix
ratios of quarry fines was investigated. The amount of
Cu(II) adsorption increases with increase in contact time.
The copper removal efficiencies of the composite mixture
gradually decrease from 94.53 % (raw clay) to 85.59 %
(20 % of quarry fines with clay), and appreciable decrease
in percent removal 75.61 % was found with 25 % of quarry
fines with clay. The kinetic adsorption data were analyzed
by pseudo-first-order, pseudo-second-order, Bhattacharya–Venkobachar and Natarajan–Khalaf kinetic models to
classify adsorption process mechanisms. Kinetic experimental
data were good agreement with pseudo-secondorder
kinetic model with the degree of fitness of the data
(R2) 0.9999 for the adsorption of Cu(II). The results
revealed that quarry fines can be used with optimum of
20 % replacement of natural clay for removal of Cu(II) as a
liner material in landfills.
Keywords
Copper ions; Heavy metals; Leachate; Landfill; Quarry fines
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