Adsorption of molybdate on molybdate-imprinted chitosan/triethanolamine gel beads

• Published in: Carbohydrate polymers Vol. 114; pp. 514 - 520
• Main Authors: Zhang, Liang, Xue, Juanqin, Zhou, Xingwen, Fei, Xiang, Wang, Yang, Zhou, Yuanzhen, Zhong, Lvling, Han, Xuanli
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 19.12.2014; Elsevier
• Subjects: Adsorbents; Adsorption; Applied sciences; Chemistry; Chitosan; Chitosan - chemistry; Ethanolamines - chemistry; Exact sciences and technology; General and physical chemistry; Ion-imprinted technology; Molybdate; Molybdenum - chemistry; Natural polymers; Physicochemistry of polymers; Starch and polysaccharides; Surface physical chemistry; Triethanolamine; Triethanolamine; Chitosan; Adsorption; Ion-imprinted technology; Molybdate; Aminoalcohol; Liquid solid adsorption; Adsorption isotherm; Adsorption capacity; Non spherical particle; Experimental study; Molybdates; Organic adsorbent; Inorganic anion; Ionic selectivity; Aqueous medium; Morphology; pH; Oside polymer; Kinetics; Manufacturing
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2014.08.049

•A new Mo (VI)-imprinted chitosan/triethanolamine gel bead (Mo (VI)-ICTGB) has been prepared.•An anion- imprinted method was used in preparing Mo (VI)-ICTGBs.•The Mo (VI)-ICTGBs have good adsorption capacity and selectivity for Mo (VI).•Mo (VI)-ICTGBs have good durance for recycling of Mo (VI) in wastewater. Mo (VI)-imprinted chitosan (CTS)/triethanolamine (TEA) gel beads (Mo (VI)-ICTGBs) (ICTGBs=imprinted chitosan triethanolamine gel beads) were prepared by using ion-imprinted technology, in which TEA and molybdate solution were used in coagulation bath. The spectrum of FT-IR implies that bonding are formed between TEA and the primary hydroxyl of CTS, and ion gel reaction happen between CTS and molybdate; XRD patterns also prove the change among CTS, TEA and molybdate. SEM images and N2 adsorption show that the surface area increases obviously after eluting Mo (VI) ions. The adsorption isotherm of Mo (VI)-ICTGBs imply that the adsorption process is according with Freundlich model. Adsorption kinetics suggests that the pseudo-second order adsorption mechanism is predominant for this adsorbent system of Mo (VI)-ICTGBs. The Mo (VI)-ICTGBs show high adsorption capacity and good selectivity for Mo (VI) anions in the coexistence system at pH=6.0. The Mo (VI)-ICTGBs have a good application prospect, because it is with a simple and rapid technique and good durance.