Sharma, Sadanand and Arora, Charu and Sahua, Deepti and Bharti, Dipti and Tamrakar, Vinita and Sonia, Sanju (2019) Adsorption of hazardous dye crystal violet from industrial waste using low-cost adsorbent Chenopodium album. Desalination and Water Treatment, 167. pp. 324-332.

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Abstract

The present article describes the use of Chenopodium album ash (wildly growing weed) as effective adsorbent for the removal of a hazardous dye, crystal violet, from its aqueous solutions. This paper presents an experimental study and discussion of the adsorption characteristics of this dye on the plant ash. Two techniques, that is, batch and column operations have been used to explain the removal process. Column capacity is found to be lesser than the batch adsorption capacity. Batch adsorption studies were conducted as a function of adsorbent dose, equilibrium pH, contact time, initial dye concentration, kinetics and Freundlich isotherms. Extent of adsorption has been found to be greater at neutral pH. Kinetic studies indicate that the overall adsorption process is best described by pseudo-first-order kinetics. The adsorption data were fitted to linearly transformed Freundlich isotherm with R2 (correlation coefficient) 0.999. Values of Freundlich parameters n and Kf have been found to be 1.642 and 14.253, respectively. These results indicate that ash of Chenopodium album can be used as an effective and low-cost adsorbent for the treatment of wastewaters contaminated with organic dye crystal violet.

Item Type:	Article
Uncontrolled Keywords:	Chenopodium album; Adsorption; Dye removal; SEM; Isotherm
Subjects:	Geo-Mechanics and Mine Design
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	21 Nov 2019 10:38
Last Modified:	21 Nov 2019 10:38
URI:	http://cimfr.csircentral.net/id/eprint/2067

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