Volume 29, Issue 4 p. 23-31
RESEARCH ARTICLE

Biosorption of chromium (VI) from textile waste water using luffa cylindrica activated carbon

Kenechi Nwosu-Obieogu

Corresponding Author

Kenechi Nwosu-Obieogu

Department of Chemical Engineering, Michael Okpara University of Agriculture, Umudike, Abia, Nigeria

Correspondence

Kenechi Nwosu-Obieogu, Department of Chemical Engineering, Michael Okpara University of Agriculture, Umudike, Nigeria

Email: kenenwosuobie@yahoo.com

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Bernard I Okolo

Bernard I Okolo

Department of Chemical Engineering, Michael Okpara University of Agriculture, Umudike, Abia, Nigeria

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First published: 02 July 2020
Citations: 13

Abstract

Luffa cylindrica was applied as a low-cost adsorbent for removing chromium (VI) from textile industry effluent in this study. The adsorbent was characterized using scanning electron micrograph (SEM). A batch mode experiment was conducted to study the effect of pH, contact time, and adsorbent dosage on the adsorptive potential of the prepared luffa cylindrica activated carbon. The characterization results from SEM indicate that the adsorbents' potential was fully exploited in this study. A significance test conducted using ANOVA indicated that contact time and adsorbent dosage had the most effect on the adsorptive removal of Cr (VI). The optimum removal efficiency was 99.90% at pH 8.0, 99.8% at 60 min of contact time, and 99.82% at an adsorbent dosage of 1.0 g. The experimental results were analyzed using the Langmuir and Freundlich adsorption isotherm models, and the Freundlich isotherm provided a better correlation for Cr (VI) adsorption. The kinetic data by the pseudo-first-order kinetic model gave a better fit than the pseudo-second-order kinetic model.

CONFLICTS OF INTEREST

The authors declare no conflict of interest.

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