Carboxymethyl sago pulp/chitosan hydrogel as an immobilization medium for activated sludge for p-nitrophenol biodegradation
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 opti...
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| Format: | Article |
| Language: | English |
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Wiley
2019
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| Online Access: | http://eprints.usm.my/50033/ http://eprints.usm.my/50033/1/Ng_Kevin_Journal%20of%20Applied%20PolymerScience.pdf |
| _version_ | 1848881611315085312 |
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| author | Ng, Si Ling Yong, Kevin Jenn Ling Pushpamalar, Janarthanan Suat, Peng Sam |
| author_facet | Ng, Si Ling Yong, Kevin Jenn Ling Pushpamalar, Janarthanan Suat, Peng Sam |
| author_sort | Ng, Si Ling |
| building | USM Institutional Repository |
| collection | Online Access |
| description | 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 |
| first_indexed | 2025-11-15T18:21:46Z |
| format | Article |
| id | usm-50033 |
| institution | Universiti Sains Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T18:21:46Z |
| publishDate | 2019 |
| publisher | Wiley |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | usm-500332021-09-24T05:31:26Z http://eprints.usm.my/50033/ Carboxymethyl sago pulp/chitosan hydrogel as an immobilization medium for activated sludge for p-nitrophenol biodegradation Ng, Si Ling Yong, Kevin Jenn Ling Pushpamalar, Janarthanan Suat, Peng Sam QD415-436 Biochemistry 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 Wiley 2019 Article PeerReviewed application/pdf en http://eprints.usm.my/50033/1/Ng_Kevin_Journal%20of%20Applied%20PolymerScience.pdf 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 https://doi.org/10.1002/app.47531 |
| spellingShingle | QD415-436 Biochemistry Ng, Si Ling Yong, Kevin Jenn Ling Pushpamalar, Janarthanan Suat, Peng Sam Carboxymethyl sago pulp/chitosan hydrogel as an immobilization medium for activated sludge for p-nitrophenol biodegradation |
| title | Carboxymethyl sago pulp/chitosan hydrogel as an immobilization
medium for activated sludge for p-nitrophenol biodegradation |
| title_full | Carboxymethyl sago pulp/chitosan hydrogel as an immobilization
medium for activated sludge for p-nitrophenol biodegradation |
| title_fullStr | Carboxymethyl sago pulp/chitosan hydrogel as an immobilization
medium for activated sludge for p-nitrophenol biodegradation |
| title_full_unstemmed | Carboxymethyl sago pulp/chitosan hydrogel as an immobilization
medium for activated sludge for p-nitrophenol biodegradation |
| title_short | Carboxymethyl sago pulp/chitosan hydrogel as an immobilization
medium for activated sludge for p-nitrophenol biodegradation |
| title_sort | carboxymethyl sago pulp/chitosan hydrogel as an immobilization
medium for activated sludge for p-nitrophenol biodegradation |
| topic | QD415-436 Biochemistry |
| url | http://eprints.usm.my/50033/ http://eprints.usm.my/50033/ http://eprints.usm.my/50033/1/Ng_Kevin_Journal%20of%20Applied%20PolymerScience.pdf |