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Adsorption of 2,4-D Herbicide from Water Environment on Modified Silica Gel Factory Waste

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Abstract:

ABSTRACT: 

The solid waste collected from a local silica gel factory was utilized as an adsorbing media for the removal of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) after its surface modification with cationic surfactant. Characterization was carried out using thermogravimetric analysis of raw and modified waste. The experiments on the sorption process were conducted for kinetic analysis, effect of initial 2,4-D concentration, adsorbent dose, dissolved salts, pH, surfactant surface coverage, temperature, and shaking speed to understand sorption behavior in batch mode. Presence of electrolyte, solution pH, and temperature were found to affect the performance of the adsorbent. The sorption was found to best follow the pseudo-second order reaction kinetics model and the Redlich-Peterson isotherm model. The studies revealed surfactant-modified silica gel waste (SMSGW) to be an efficient adsorbing media for removal of 2,4-D.

Keywords: 2,4-D; adsorption; herbicide; removal; surfactant-modified silica gel waste

Document Type: Research Article

DOI: https://doi.org/10.2175/106143013X13736496909310

Publication date: 2013-11-01

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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