Ng, Si Ling and Yong, Kevin Jenn Ling and Pushpamalar, Janarthanan and Suat, Peng Sam (2019) Carboxymethyl sago pulp/chitosan hydrogel as an immobilization medium for activated sludge for p-nitrophenol biodegradation. Journal of Applied Polymer Science, 136 (20). p. 47531. ISSN 1097-4628
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Abstract
In this study, carboxymethyl sago pulp (CMSP) derived from sago waste was successfully crosslinked with ferric ions in the presence of chitosan forming a novel immobilization matrix for p-nitrophenol (PNP)-acclimated activated sludge. On the basis of the shortest biodegradation time of PNP, the optimized operational conditions of immobilization were found to be: 7 w/v% CMSP, 9 g L−1 of activated sludge, 0.1 M ferric ion, and 15 min of crosslinking time. Observable inhibited PNP biodegradation was exhibited by the suspended activated sludge at the initial PNP concentration of 400 mg L−1. In contrast, complete mineralization was achieved by the CMSP/chitosan-immobilized activated sludge (CMSP/Ch-AS) beads. The results revealed the important role of CMSP/Ch hydrogel in protecting activated sludge from the toxicity of PNP. The CMSP/Ch-AS beads could be reused consecutively up to three and two cycles, respectively, for the biodegradation of PNP at 200 and 400 mg L−1, with the attainment of more than 99% of PNP removal at each cycle
| Item Type: | Article |
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| Subjects: | Q Science > QD Chemistry > QD415-436 Biochemistry |
| Divisions: | Pusat Pengajian Sains Kimia (School of Chemical Sciences) > Article Zoom Profil Pakar (Expert Profile) > Ng Si Ling (Chemical Sciences) |
| Depositing User: | Administrator Automasi |
| Date Deposited: | 24 Sep 2021 05:31 |
| Last Modified: | 24 Sep 2021 05:31 |
| URI: | http://eprints.usm.my/id/eprint/50033 |
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