title: Simultaneous removal of thallium and chloride from a highly saline industrial wastewater using modified anion exchange resins.
abstract: Simultaneous removal of thallium (Tl) and chloride from a highly saline industrial wastewater was investigated using modified anion ion exchange resins. The removal of thallium was mainly driven by the exchange of Tl-chlorocomplex (TlCl4-) formed in the oxidation of thallous (Tl (I)) to thallic ion (Tl (III)) by hydrogen peroxide (H2O2) under saline conditions. Over 97% of thallium and chloride removal was achieved using the modified resins, with a wide optimal conditions found to be H2O2dosage 1.0-25.0mL/L, pH 1.6-4.3, and flow rate 0.5-4.7mL/L. The modified resins had an exchange capacity of 4.771mg Tl/g dry resins for thallium and 1800mg Cl/g dry resins for chloride. Stable regeneration could be achieved with the modified resins: over 97% of thallium and 90% of chloride can be eluted using Na2SO3solution and alternating hot (60°C) H2SO4and cold (25°C) water, and over 98% removal of thallium and chloride was achieved after five consecutive regeneration cycles.
authors.affiliation: Collaborative Innovation Center of Water Quality Safety and Protection in Pearl River Delta, Guangzhou University, Guangzhou 510006, PR China.
authors.forename: Huosheng
authors.initials: H
authors.lastname: Li
authors.affiliation: Collaborative Innovation Center of Water Quality Safety and Protection in Pearl River Delta, Guangzhou University, Guangzhou 510006, PR China; Key Laboratory of Water Safety and Protection in Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, PR China. Electronic address: chenyong_heng@163.com.
authors.forename: Yongheng
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Key Laboratory of Water Safety and Protection in Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, PR China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China.
authors.forename: Jianyou
authors.initials: J
authors.lastname: Long
authors.affiliation: School of Forestry and Environmental Studies, Yale University, New Haven, CT 06511, United States.
authors.forename: Daqian
authors.initials: D
authors.lastname: Jiang
authors.affiliation: Collaborative Innovation Center of Water Quality Safety and Protection in Pearl River Delta, Guangzhou University, Guangzhou 510006, PR China.
authors.forename: Juan
authors.initials: J
authors.lastname: Liu
authors.affiliation: Collaborative Innovation Center of Water Quality Safety and Protection in Pearl River Delta, Guangzhou University, Guangzhou 510006, PR China.
authors.forename: Sijie
authors.initials: S
authors.lastname: Li
authors.affiliation: South China Institute of Environmental Science, Ministry of Environmental Protection, Guangzhou, PR China.
authors.forename: Jianying
authors.initials: J
authors.lastname: Qi
authors.affiliation: Key Laboratory of Water Safety and Protection in Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, PR China.
authors.forename: Ping
authors.initials: P
authors.lastname: Zhang
authors.affiliation: School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China.
authors.forename: Jin
authors.initials: J
authors.lastname: Wang
authors.affiliation: Key Laboratory of Water Safety and Protection in Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, PR China; School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China.
authors.forename: Jian
authors.initials: J
authors.lastname: Gong
authors.affiliation: Collaborative Innovation Center of Water Quality Safety and Protection in Pearl River Delta, Guangzhou University, Guangzhou 510006, PR China.
authors.forename: Qihang
authors.initials: Q
authors.lastname: Wu
authors.affiliation: School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, PR China.
authors.forename: Diyun
authors.initials: D
authors.lastname: Chen
keywords: Chloride; Heavy metal; Industrial wastewater; Resins; Thallium