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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received March 20, 2015
Accepted November 20, 2015

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Adsorptive characteristics of the polyurethane-immobilized Corynebacterium glutamicum biosorbent for removal of Reactive Yellow 2 from aqueous solution

Sung Wook Won Juan Mao¹ Gopinathan Sankar² Hyun-Cheol Lee³ Yeoung-Sang Yun^4†

Department of Marine Environmental Engineering and Institute of Marine Industry, Gyeongsang National University, 38, Cheondaegukchi-gil, Tongyeong, Gyeongnam 53064, Korea ¹Department of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China ²Department of Chemistry, University College London, 20 Gordon Street, London WC1H0AJ, U.K., UK ³Department of Clinical Pathology, Hanlyo University, 94-13, Hallyeodae-gil, Gwangyang-eup, Gwangyang, Jeonnam 57764, Korea ⁴School of Chemical Engineering, Chonbuk National University, Jeonju, Jeonbuk 54898, Korea

Korean Journal of Chemical Engineering, March 2016, 33(3), 945-951(7), 10.1007/s11814-015-0251-3

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Abstract

Polyurethane (PU) was evaluated for its possibility as an immobilization matrix for the raw biomass of Corynebacterium glutamicum. Initially, different blending ratios of the raw biomass to PU weight were tested, and the ratio of 7 : 3 was identified as the optimal condition. PU-immobilized biosorbent (PUIB) with a particle size ranging from 0.425 to 0.18mm was selected for the adsorption of Reactive Yellow 2 (RY2). The uptake of RY2 on the PUIB was favorable at acidic pH, especially below 3. According to the Langmuir model, the maximum RY2 uptakes were estimated to be 104.0, 93.3, and 87.3mg/g at pH 2, 3, and 4, respectively. The pseudo-first-order and pseudo-secondorder models were applied to fit the biosorption kinetic data; the latter model fitted the data well with a high coefficient of determination (R2) and low average percentage error (ε) values. The RY2-sorbed PUIB was able to be regenerated and reused for five cycles of the adsorption and desorption processes.

Keywords

Polyurethane Corynebacterium glutamicum Reactive Dye Immobilization Regeneration

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