Facile Preparation of Magnetic Chitosan Coprecipitated by Ethanol/NH₃·H₂O for Highly Efficient Removal toward Cr(VI).

ABSTRACT: The adsorption ability of chitosan (CS) usually decreases with the introduction of magnetic particles, and thus magnetic CS has to be chemically modified further to improve its adsorption performance. Herein, a novel magnetic chitosan composite (Fe₃O₄-CS3) with porous structure and evenly distributed Fe₃O₄ was successfully prepared via the reduction of the solubility of CS by ethanol (physical reaction), and followed the coprecipitation of the mixture of FeCl₃/FeCl₂/CS by ethanol/NH₃·H₂O. Without any modification, its maximum adsorption capacity toward Cr(VI) ions can achieve 242.1 mg/g (≈468.6 mg/g of CS). This significant progress could be ascribed to the very fast precipitate rate of CS due to the de

SUBMITTER: Cai W 

PROVIDER: S-EPMC6641757 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature