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- Title
Extractive efficacy for acephate of microwave synthesized zeolitic materials: equilibrium and kinetics.
- Authors
SHAH, BHAVNA A.; SHAH, AJAY V.; JADAV, PIYUSH Y.
- Abstract
The present investigation deals with the utilization of Bagasse fly ash (BFA), a sugar industry waste, and a zeolitic material (MZBFA) synthesized from BFA by a combined conventional and microwave reflux method as adsorbents for the extraction of acephate (ACP), an organophosphorus pesticide, from aqueous solution. The synthesized adsorbents were characterized using various techniques, such as Fourier-transform infrared (FTIR) spectroscopy, powder X-ray diffraction (PXRD) analysis and scanning electron microscopy (SEM). The effects of various experimental parameters were investigated using a batch adsorption technique for the extraction of ACP. The extent of removal increased with decreasing initial ACP concentration and particle size of the adsorbent. The adsorption was fast and equilibrium was established within 90 min. Pseudo-first-order, pseudo-second-order, Bangham and intra-particle diffusion models were used to fit the experimental data. The pseudo-second-order rate equation was able to provide a realistic description of the adsorption kinetics. Equilibrium isotherms were analyzed by the Freundlich, Langmuir, Dubinin--Radushkevich and Tempkin isotherm Equations. The Langmuir Equation was found to represent the equilibrium data the best. A thermodynamic study showed that the adsorption of ACP on MZBFA was higher than that on BFA. The results indicate that such Zeolitic materials could be employed as low cost alternatives to BFA in wastewater treatment for the removal of pesticides.
- Subjects
ACEPHATE; EXTRACTION (Chemistry); MICROWAVES; CHEMICAL synthesis; EQUILIBRIUM reactions; SCANNING electron microscopy
- Publication
Journal of the Serbian Chemical Society, 2013, Vol 78, Issue 7, p1055
- ISSN
0352-5139
- Publication type
Article
- DOI
10.2298/JSC120530146S