Lai, Kar Chiew and Hiew, Billie Yan Zhang and Lee, Lai Yee and Gan, Suyin and Thangalazhy-Gopakumar, Suchithra and Chiu, Wee Siong and Khiew, Poi Sim (2019) Ice-templated graphene oxide/chitosan aerogel as an effective adsorbent for sequestration of metanil yellow dye. Bioresource Technology, 274. pp. 134-144. ISSN 0960-8524, DOI https://doi.org/10.1016/j.biortech.2018.11.048.
Full text not available from this repository.Abstract
Graphene oxide/chitosan aerogel (GOCA) was prepared by a facile ice-templating technique without using any cross-linking reagent for metanil yellow dye sequestration. The adsorption performance of GOCA was investigated by varying the adsorbent mass, shaking speed, initial pH, contact time, concentration and temperature. The combined effects of adsorption parameters and the optimum conditions for dye removal were determined by response surface methodology. GOCA exhibited large removal efficiencies (91.5–96.4%) over a wide pH range (3–8) and a high adsorption capacity of 430.99 mg/g at 8 mg adsorbent mass, 400 mg/L concentration, 35.19 min contact time and 175 rpm shaking speed. The adsorption equilibrium was best represented by the Langmuir model. GOCA could be easily separated after adsorption and regenerated for re-use in 5 adsorption-desorption cycles thereby maintaining 80% of its adsorption capability. The relatively high adsorption and regeneration capabilities of GOCA render it an attractive adsorbent for treatment of azo dye-polluted water.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Higher Education (MOHE), Malaysia under the Fundamental Research Grant Scheme (FRGS/1/2015/SG06/UNIM/02/1) |
| Uncontrolled Keywords: | Chitosan/graphene oxide aerogel; Ice-templating; Metanil yellow dye; Adsorption |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics T Technology > TP Chemical technology |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 17 Jan 2019 04:29 |
| Last Modified: | 17 Jan 2019 04:29 |
| URI: | http://eprints.um.edu.my/id/eprint/20042 |
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