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    • ISSN: 1793-821X
    • Frequency: Quarterly (2013-2014); Bimonthly (Since 2015)
    • DOI: 10.18178/JOCET
    • Editor-in-Chief: Prof. Haider F. Abdul Amir
    • Executive Editor: Ms. Julia S. Ma
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Editor-in-chief
School of Science and Technology Universiti Malaysia Sabah, Malaysia.
I would like to express my appreciation to all authors, reviewers and edtors.
JOCET 2014 Vol.2(2): 158-162 ISSN: 1793-821X
DOI: 10.7763/JOCET.2014.V2.113

Chromium and Iron Removal for Hard Chrome Bath Recycling using Eggshell Sorbent

Theeraporn Rubcumintara
Abstract—This research is to study the removal of chromium and iron from spent hard chrome plating solutions using eggshell as selected bio-waste sorbent. It was found from the batch experiments that the chemically modified eggshell with hydrochloric acid resulted in better performance in comparison with the unmodified eggshell. The removal efficiency as well as adsorption capacity for Fe(II), Cr(III), and Cr(VI) were 95%, 100%, 13% and 94.5 mg/g, 18.8 mg/g, 173.4 mg/g, respectively in 48 h. The kinetics of chromium and iron sorption were described by pseudo first order and pseudo second order kinetic models. The experimental kinetic data fitted well with the pseudo second order kinetic model for both chromium and iron. The adsorption isotherms using Langmuir and Freundlich models were also evaluated by linearized forms. The best-fitted model to the experimental equilibrium data for eggshell sorbent was found to be the Freundlich model. From this investigation, the purification and recovery of hard chrome bath from spent plating solutions can be achieved using eggshell adsorption.

Index Terms—Hard chrome, recycling, eggshell, biosorbent.

Theeraporn Rubcumintara is with the Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Puttamonthon 4 Rd., Nakhonpathom, Thailand (e-mail:theeraporn.rub@mahidol.ac.th).

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Cite:Theeraporn Rubcumintara, "Chromium and Iron Removal for Hard Chrome Bath Recycling using Eggshell Sorbent," Journal of Clean Energy Technologies vol. 2, no. 2, pp. 158-162, 2014.

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