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Reference type: Journal
Authors: Deng H, Wei ZL, Wang XN
Article Title: Enhanced adsorption of active brilliant red X-3B dye on chitosan molecularly imprinted polymer functionalized with Ti(IV) as Lewis acid.
Publication date: 2017
Journal: Carbohydrate Polymers
Volume: 157
Page numbers: 1190-1197.
DOI: 10.1016/j.carbpol.2016.10.087
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0144861716312565

Abstract: A Ti(IV) functionalized chitosan molecularly imprinted polymer (Ti-CSMIP) was successfully prepared. Ti4+ as Lewis acidic was used to modify chitosan MIP by producing metal hydroxyl group and protonated surface of adsorbent in aqueous solution to recognize X-3B molecule as a Lewis base. The adsorbent was characterized by FTIR, SEM, XRD, BET, elemental and zeta potential analysis. XRD illustrated Ti-CSMIP exhibited a weak anatase phase when Ti4+ cross-linked with chitosan. Batch adsorption experiments were performed to evaluate adsorption condition, including sorption isotherm, kinetics and reusability. The maximum adsorption capacity of Ti-CSMIP for X-3B was 161.1 mg/g at 293 K when solution pH was in the range of 6.0-7.0. Equilibrium data was well analyzed by three-parameter isotherm model, and the kinetics of adsorption followed the pseudo-second kinetics equation. Regeneration experiments indicated a possible application as an effective sorbent for the selective removal of azo anionic dye in aqueous solutions
Template and target information: active brilliant red X-3B, X-3B
Author keywords: Molecularly imprinted chitosan, Ti4+, Lewis acids, Removal of X-3B


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