title: Continuous fixed bed adsorption of Cu(II) by halloysite nanotube-alginate hybrid beads: an experimental and modelling study.
abstract: We used natural resources of halloysite nanotubes and alginate to prepare a novel porous adsorption material of organic-inorganic hybrid beads. The adsorption behaviour of Cu(II) onto the hybrid beads was examined by a continuous fixed bed column adsorption experiment. Meanwhile, the factors affecting the adsorption capacity such as bed height, influent concentration and flow rate were investigated. The adsorption capacity (Q0) reached 74.13 mg/g when the initial inlet concentration was 100 mg/L with a bed height of 12 cm and flow rate of 3 ml/min. The Thomas model and bed-depth service time fitted well with the experimental data. In the regeneration experiment, the hybrid beads retained high adsorption capacity after three adsorption-desorption cycles. Over the whole study, the new hybrid beads showed excellent adsorption and regeneration properties as well as favourable stability.
authors: School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China E-mail: zhangb@zzu.edu.cn.
authors: Yanyan
authors: Y
authors: Wang
authors: School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China E-mail: zhangb@zzu.edu.cn.
authors: Xiang
authors: X
authors: Zhang
authors: School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China E-mail: zhangb@zzu.edu.cn.
authors: Qiuru
authors: Q
authors: Wang
authors: School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China E-mail: zhangb@zzu.edu.cn.
authors: Bing
authors: B
authors: Zhang
authors: Institute of Industrial Chemistry, Zhengzhou University, Zhengzhou 450001, China.
authors: Jindun
authors: J
authors: Liu
mesh_terms: D000327:Adsorption; D000464:Alginates / Q000737:chemistry*; D000538:Aluminum Silicates / Q000737:chemistry*; D000077215:Clay; D003300:Copper / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D043942:Nanotubes / Q000737:chemistry*; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D000464:Alginates; D000538:Aluminum Silicates; D000077215:Clay; D003300:Copper; D020723:Glucuronic Acid; D006603:Hexuronic Acids; D062065:Wastewater; D014874:Water Pollutants, Chemical