title: Preparation, characterization and application of a copper (II)-bound polymeric ligand exchanger for selective removal of arsenate from water.
abstract: A copper (II)-bound polymeric ligand exchanger named WH-425-Cu was prepared by loading Cu(2+) onto poly (4-vinylpyridine) resin. The performance of WH-425-Cu as the ligand exchanger to remove arsenate [As (V)] from aqueous solution was also investigated by using static equilibrium and dynamic adsorption experiments. Results of static experiments indicated that WH-425-Cu had higher adsorption selectivity for As (V) than other ubiquitous anions in nature water body such as SO(4)(2-), Cl(-), SiO(3)(2-), and PO(4)(3-). The optimal pH for adsorption of As (V) on WH-425-Cu was in the range of 6.0-8.0. The As (V) adsorbed on WH-425-Cu could be easily eluted with 7 BV of 6% NaCl solution (at pH = 9.0) with elution efficiency above 99%. The prepared WH-425-Cu could be used as a highly selective and reusable ligand exchanger for selective removal of As (V) from water.
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, 163 Xianlin Road, Nanjing 210046, PR China.
authors.forename: Weihua
authors.initials: W
authors.lastname: Tao
authors.forename: Aimin
authors.initials: A
authors.lastname: Li
authors.forename: Chao
authors.initials: C
authors.lastname: Long
authors.forename: Zhicheng
authors.initials: Z
authors.lastname: Fan
authors.forename: Wenwen
authors.initials: W
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D001149:Arsenates / Q000302:isolation & purification*; D003300:Copper / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008024:Ligands; D011108:Polymers / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D001149:Arsenates; D008024:Ligands; D011108:Polymers; D014874:Water Pollutants, Chemical; D003300:Copper; C025657:arsenic acid