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Title: Physicochemical parameters, isotherms, sorption kinetics and column operations for adsorption of copper (II) from wastewater using fly ash
Authors: Nath, Kaushik
Gor, J P
Shah, P N
Modi, K
Keywords: Adsorbent
Copper (II)
Fly ash
Issue Date: Feb-2007
Publisher: CSIR
Abstract: The potential of activated fly ash has been investigated for the adsorption of copper (II) dissolved in wastewater. Physico-chemical parameters such as adsorbate concentration, pH, adsorbent dose, temperature, presence of interfering ions etc were optimized by employing batch adsorption technique. Adsorption was endothermic and followed Langmuir and Freundlich isotherms, however, the latter fitted well. Isotherms were used to estimate thermodynamic parameters for the adsorption process. Kinetic data were fitted to the models of intraparticle diffusion, pseudo second order and Lagergren model which followed more closely to the pseudo second order chemisorption model. The regeneration and reusability of the adsorbents were also assessed. Maximum removal of copper (II) was obtained at pH 4 and temperature 50°C (about 98% for adsorbent dose of 20 g/l and 50 mg/l initial feed concentration).
Description: 170-177
ISSN: 0022–4456
Appears in Collections:JSIR Vol.66(02) [February 2007]

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