Ice-templated graphene oxide/chitosan aerogel as an effective adsorbent for sequestration of metanil yellow dye

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

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Official URL: https://doi.org/10.1016/j.biortech.2018.11.048

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
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 > Dept 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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