Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/7104
Title: Removal of Cr(VI) from aqueous solution by adsorption onto low cost non-conventional adsorbents
Authors: Bhattacharya, A K
Mandal, S N
Das, S K
Keywords: Adsorption
Non-conventional adsorbent
Lagergren model
Chromium(VI)
Issue Date: Nov-2006
Publisher: CSIR
Series/Report no.: B01D15/00
Abstract: Adsorption behavior of chromium, Cr(VI) from wastewater has been investigated using clarified sludge (a steel plant waste material), rice husk ash and sawdust as non-conventional adsorbents. The studies were carried out at room temperature (30<sup>o</sup>C) following batch adsorption technique in a reciprocating shaker. Factors affecting the adsorption characteristics such as agitation time, initial metal ion concentration, adsorbent dose and <i style="">p</i>H were studied. Maximum adsorption of Cr(VI) was observed at <i style="">p</i>H 3. The experimental data fitted to Langmuir and Freundlich isotherms. The adsorption process found to follow Lagergren first order kinetics model. Adsorption capacity has been observed to follow the order clarified sludge > rice husk ash > sawdust. At <i style="">p</i>H 3 and initial Cr(VI) concentration of 3 mg/L more than 99% removal of Cr(VI) may be possible. The maximum amount of adsorbed metal (<i style="">q</i><sub>max</sub>) value is significantly influenced by liquid/solid ratio and by the <i style="">p</i>H values of the metal solutions.
Description: 576-583
URI: http://hdl.handle.net/123456789/7104
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.13(6) [November 2006]

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