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Vol. 25 No. 8 (2013): Vol 25 Issue 8

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Foundry Solid Waste as Adsorbent for the Removal of Basic Dyes from its Aqueous Solution

https://doi.org/10.14233/ajchem.2013.14010
P. Meena Sundari
Department of Chemistry, Jansons Institute of Technology, Karumathampatti, Coimbatore-641 659, India
T. Santhi
Department of Chemistry, Karpagam Univeristy, Eachanari, Coimbatore-641 021, India
T. Meenambal
Department of Civil Engineering, Government College of Technology, Coimbatore-641 013, India

Corresponding Author(s) : P. Meena Sundari

meenamurali98@gmail.com

Asian Journal of Chemistry, Vol. 25 No. 8 (2013): Vol 25 Issue 8

Abstract

Shot blasting dust, an abundant waste material from foundries can be employed as an adsorbent for the removal of basic dyes from aqueous solutions. Methylene blue and malachite green were selected as model compounds for evaluating the adsorption capacity and removal of dye from waste waters. Structural characterization of raw shot blasting dust was done through wet analysis, Fourier transform infrared spectrometry analysis and X-ray diffraction spectroscopy analysis. Surface morphology of raw shot blasting dust was studied through scanning electron microscopy and BET analysis. The effect of pH, initial dye concentration, adsorbent dosage, adsorbent particle size and contact time were evaluated and optimum experimental conditions were verified. Results obtained from the present study revealed that as the amount of adsorbent increases, the percentage removal of basic dyes also increased. For both the dyes an optimum pH 7 was found to be effective. Maximum removal of methylene blue (92.2 %) and malachite green (95.95 %) was observed at neutral pH, adsorbent dosage of 500 mg, temperature 27 ± 2 ºC and initial concentration of 10 mg L-1. The adsorption of methylene blue and malachite green followed pseudo second order kinetics and intra particle diffusion model. Study on both the dyes fits the Freundlich, Langmuir and Dubnin-Radushkevich (D-R) isotherms well. The present study confirms the potentiality of an abundant low cost solid waste material and its availability for the removal of basic dyes from aqueous solution.

Keywords

Shot blasting dust Foundry waste Adsorption Methylene blue Malachite green Isotherms
Meena Sundari, P., Santhi, T., & Meenambal, T. (2013). Foundry Solid Waste as Adsorbent for the Removal of Basic Dyes from its Aqueous Solution. Asian Journal of Chemistry, 25(8), 4434–4440. https://doi.org/10.14233/ajchem.2013.14010
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