A Wide Adsorption Range Hybrid Material Based on Chitosan, Activated Carbon and Montmorillonite for Water Treatment

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Sandrine Delpeux-Ouldriane¹  Farida Bouyahmed¹  Min Cai¹  Ratan Kumar Dey²  Fabrice Muller³  Laurence Reinert⁴  Laurent Duclaux⁴  Mohammed Lahcini⁵  Hicham Ben Youcef⁶ 

[1] CNRS-ICMN, Université d’Orléans, 45071 Orléans, France;Centre for Applied Chemistry/Centre for Nanotechnology, Central University of Jharkhand, Brambe, Jharkhand, 835205 Ranchi, India;ISTO, CNRS-Université d’Orléans-BRGM, 45071 Orléans, France;LCME, Université Savoie Mont Blanc, 73000 Chambéry, France;Laboratory of Organometallic and Macromolecular Chemistry—Composites Materials, Faculty of Sciences and Technologies of Marrakech, CADAI AYYAD University, 40000 Marrakech, Morocco;Materials Science and Nano-engineering Department, Mohammed VI Polytechnic University, 43150 Ben Guerir, Morocco;

关键词: adsorption;    biopolymer;    clay minerals;    activated carbon;    zinc cation;    metoprolol;    clofibric acid;    water treatment;   

DOI  :  10.3390/c4020035

来源: DOAJ

【 摘 要 】

Numerous adsorbent materials are developed and are able to face specific types of pollution, but none of them can manage the whole pollution. The purpose of this work is to develop a novel hybrid adsorbent, based on chitosan (CS) biopolymer, clay minerals and activated carbon (AC), having complementary adsorption properties and achieving a wide-spectrum water decontamination in a single treatment. Hybrid CS beads, containing dispersed clay and AC, were prepared from dispersions of solid adsorbents in a CS solution and its further coagulation in a basic medium. The porosity and the homogeneity of the hybrid beads were characterized by N2 adsorption at 77 K and Cryo-Scanning Electron Microscopy respectively. The interaction between CS and clay was characterized using X-ray diffraction. Water content and the amount of each adsorbent in the hydrogel beads were determined by thermogravimetric analysis. Such a composite material was still porous and presented a wide adsorption spectrum. As shown by their adsorption kinetics, hydrophobic anionic clofibric acid (CBA) and cationic metoprolol (MTP) were well adsorbed on AC containing beads (21 and 26 mg/g), respectively. Clays containing beads showed interesting adsorption properties towards cationic Zn2+ and MTP. The obtained composite beads were able to adsorb all the pollutant types: Zinc cations, and hydrophobic-charged organic molecules, such as pharmaceutical derivatives (clofibric acid and MTP).

【 授权许可】

Unknown