Adsorption of metals by crosslinked chitosan beads in sugarcane contaminated streams

Genipin was used as a crosslinking agent to prepare magnetic genipin-crosslinked chitosan beads, which were then used as a carrier for immobilizing recombinant cutinase from Fusarium solani (FSC) to obtain immobilized FSC. The optimal temperature for the immobilized FSC was 55 °C, which was 5 °C higher than that of the free enzyme, whereas its optimal pH was increased from 8.0 to 9.0; this indicates that the immobilized FSC had improved pH and thermal stability. After repeated use for 10 cycles, the activity of the immobilized FSC remained at more than 50%; after being stored at 4 °C for 30 days, its activity was still approximately 88%. We also found that the Km of the immobilized FSC was higher than that of the free enzyme. These results indicate that the performance of FSC was improved after immobilization, which is an important basis for the subsequent application of FSC in industrial production.

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Study of sodium tripolyphosphate-crosslinked chitosan beads entrapped with Pseudomonas putida for phenol degradation

Process Biochemistry ◽

10.1016/j.procbio.2007.10.016 ◽

2008 ◽

Vol 43 (1) ◽

pp. 83-92 ◽

Cited By ~ 43

Author(s):

Feng-Ming Hsieh ◽

Chih Huang ◽

Tsair-Fuh Lin ◽

Yan-Min Chen ◽

Jui-Che Lin

Keyword(s):

Pseudomonas Putida ◽

Sodium Tripolyphosphate ◽

Phenol Degradation ◽

Chitosan Beads ◽

Crosslinked Chitosan

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Effect of deacetylation degree of chitosan on rheological properties and physical chemical characteristics of genipin-crosslinked chitosan beads

Food Hydrocolloids ◽

10.1016/j.foodhyd.2020.105876 ◽

2020 ◽

Vol 106 ◽

pp. 105876 ◽

Cited By ~ 4

Author(s):

Loleny Tavares ◽

Elí Emanuel Esparza Flores ◽

Rafael Costa Rodrigues ◽

Plinho Francisco Hertz ◽

Caciano Pelayo Zapata Noreña

Keyword(s):

Rheological Properties ◽

Chemical Characteristics ◽

Chitosan Beads ◽

Deacetylation Degree ◽

Physical Chemical ◽

Crosslinked Chitosan

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New insight into the role of crosslinkers and composition on selectivity and kinetics of antimony uptake by chitosan-titania composite beads

SN Applied Sciences ◽

10.1007/s42452-021-04158-7 ◽

2021 ◽

Vol 3 (2) ◽

Author(s):

Padala Abdul Nishad ◽

Anupkumar Bhaskarapillai ◽

Madapuzi P. Srinivasan ◽

Srinivasan Rangarajan

Keyword(s):

Industrial Application ◽

Binding Properties ◽

Chitosan Beads ◽

Design And Synthesis ◽

Titania Content ◽

Composite Beads ◽

Crosslinked Chitosan ◽

Kinetics Of ◽

Insight Into

AbstractRole of composition and the nature of crosslinking on the properties of titania-chitosan beads have been investigated in detail. The investigations were done in order to explore the feasibility of design and synthesis of titania-chitosan beads with bespoke functionality based on the intended application. This would greatly enhance the potential for the industrial application of these biopolymer based beads. Beads of varying compositions (of titania and chitosan) were prepared and crosslinked using epichlorohydrin or glutaraldehyde. The physical characteristics and antimony binding properties of the resultant crosslinked titania-chitosan beads were investigated in detail. Influence of chitosan amount on swelling was seen to be more predominant in the glutaraldehyde crosslinked beads (TA-Cts-Glu). TA-Cts-Glu beads showed more swelling and better antimony (Sb(III) and Sb(V)) uptake as compared to the epichlorohydrin crosslinked beads (TA-CTS-Epi). While TA-Cts-Glu beads showed faster uptake kinetics compared to the TA-CTS-Epi beads, the latter showed selectivity towards Sb(III) against transition metal cations. Further, the beads exhibited differential uptake of Sb(V) and Sb(III). TA-Cts-Glu beads prepared with equal amounts of titania and chitosan showed the maximum Sb(V) uptake while the TA-Cts-Epi beads with higher chitosan to titania ratio showed the least. Sb(V) binding was enhanced by the crosslinked chitosan, while the Sb(III) uptake was aided predominantly by the titania content in the beads.

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