Tan, Tee How and Mo, Kim Hung and Lai, Sai Hin and Ling, Tung-Chai (2021) Synthesis of porous geopolymer sphere for Ni(II) removal. Ceramics International, 47 (20). pp. 29055-29063. ISSN 0272-8842, DOI https://doi.org/10.1016/j.ceramint.2021.06.268.
Full text not available from this repository.Abstract
Maintaining a high quality of water resources is always the top priority as water is highly essential in many aspects. However, contamination of water resources, especially due to the improper discharge of industrial wastewater is drawing attention. Poorly or untreated industrial wastewater is usually severely polluted with hazardous materials such as heavy metals. Therefore, this study intended to prepare a facile-fabricated porous geopolymer sphere and investigate its potential as an adsorbent for the removal of Ni(II) from wastewater. Porous geopolymer spheres can be beneficial for direct use in packed bed systems and can be retrieved easily upon being exhausted. Results demonstrated that at the equilibrium contact time of 48 h, the Ni(II) uptake capacity of porous geopolymer spheres was approximately 3.4 times greater than non-foamed geopolymer spheres. The large pore size and open porosity network that exist in porous geopolymer spheres enhance the adsorption performance as these factors allow easy penetration of Ni(II). The optimum pH was found to be pH 5. The pH can greatly affect the removal performance, where low pH results in competition for binding sites between H+ and Ni(II), while high pH induces the precipitation of Ni(OH)2. The maximum Ni(II) removal capacity obtained from the isotherm study was 19.94 mg/g.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Malaya, Ministry of Education, Malaysia (FP056-2018A (FRGS/1/2018/TK06/UM/02/1)) |
| Uncontrolled Keywords: | Geopolymer; Porosity; Ni(II); Heavy metal; Adsorbent |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 06 Apr 2022 02:43 |
| Last Modified: | 06 Apr 2022 02:43 |
| URI: | http://eprints.um.edu.my/id/eprint/26662 |
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