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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 21, No. 7, 2017, pp. 1307-1312
Bioline Code: ja17167
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 21, No. 7, 2017, pp. 1307-1312

 en Arsenic Removal using Silver-Impregnated Prosopis spicigera check for this species in other resources L. wood (PSLW) Activated Carbon: Batch and Column Studies
MURUGAN, M; JANSIRANI, M; SUBRAMANIAM, P & SUBRAMANIAM, E

Abstract

Silver-impregnated carbon (SIC) and its precursor (un-impregnated) derived from an easily available low cost plant material Prosopis spicigera L. wood (PSLW) carbon was investigated for their ability to remove arsenic from aqueous solutions in batch and column experiments. Arsenic uptake has no regular trend with increasing pH; contains two adsorption maxima, the first adsorption maximum at pH 4.0 and a second adsorption maximum at pH 10.0. The extent of As (III) removal increased with increase in temperature. As (III) sorption kinetics was well fitted by pseudo second order with pore diffusion as rate determining step. The applicability of Langmuir isotherm suggests the formation of monolayer coverage of As (III) at the outer surface of the adsorbent. Thermodynamic parameters show that the adsorption was spontaneous and endothermic in nature. Column experiments were done using Thomas model, the maximum adsorption capacity of SIC was found to be 9.36 mg/g.

Keywords
Adsorption; Arsenic; batch adsorption; langmuir isotherm; silver-impregnated carbon (SIC); Thomas model.

 
© Copyright 2017 - Murugan et al.

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