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Title: Adsorption of As(V) from aqueous solution by chemically doped coir pith carbon
Authors: Selvakumar, R
Kavitha, S
Swaminathan, K
Keywords: Coir pith
As(V) removal
Thermal activation
Isotherm studies
Issue Date: May-2007
Publisher: CSIR
IPC CodeB01D17/00: 15/00
Abstract: The present work examines the possible use of coir pith, a by-product from coir fibre industry as a means of removing As(V) from aqueous solution. Kinetic and equilibrium experiments were performed in order to evaluate the efficiency of the thermally activated coir pith carbon (TCPC). The efficiency of TCPC was improved by doping with FeSO₄.7H₂O (FCPC) and CuSO₄.5H₂O (CCPC). Adsorption studies were carried out using these doped and undoped coir pith carbon. Maximum removal was observed with FCPC with a Qℴ value of 18.9 mg/g followed by CCPC with Qℴ value of 14.77 mg/g at maximum As(V) concentration. TCPC was comparatively less efficient when compared to the doped adsorbents and had a Qℴ value of 8.39 mg/g. The rate of adsorption was dependent on the As(V) concentration. Langmuir and Freundlich isotherms were applied and the experimental data fitted well with these isotherms. The desorption and regeneration studies revealed that FCPC after regeneration could remove 62.8% As(V) when recycled. The results indicate that FCPC could be used as an effective adsorbent for As(V) removal from ground water sample.
Page(s): 276-282
ISSN: 0971–457X
Source:IJCT Vol.14(3) [May 2007]

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