Collaborative Innovation Center of Water Quality Safety and Protection in Pearl River Delta, Guangzhou University, Guangzhou 510006, PR China.
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.
J Hazard Mater. 2017 Jul 5;333:179-185. doi: 10.1016/j.jhazmat.2017.03.020. Epub 2017 Mar 11.
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 (TlCl) formed in the oxidation of thallous (Tl (I)) to thallic ion (Tl (III)) by hydrogen peroxide (HO) under saline conditions. Over 97% of thallium and chloride removal was achieved using the modified resins, with a wide optimal conditions found to be HO dosage 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 NaSO solution and alternating hot (60°C) HSO and cold (25°C) water, and over 98% removal of thallium and chloride was achieved after five consecutive regeneration cycles.
采用改性阴离子交换树脂同时去除高盐工业废水中的铊（Tl）和氯离子。在盐条件下，用过氧化氢（HO）将一价铊（Tl (I)）氧化为三价铊（Tl (III)）时形成的 Tl-Cl 络合物（TlCl）的交换是去除铊的主要驱动力。使用改性树脂可实现超过 97%的铊和氯离子去除，发现广泛的最佳条件为 HO 用量 1.0-25.0mL/L、pH 值 1.6-4.3 和流速 0.5-4.7mL/L。改性树脂对铊的交换容量为 4.771mg Tl/g 干树脂，对氯离子的交换容量为 1800mg Cl/g 干树脂。改性树脂可实现稳定的再生：使用 NaSO 溶液和交替的热（60°C）HSO 和冷（25°C）水可洗脱超过 97%的铊和 90%的氯离子，经过五个连续的再生循环后，铊和氯离子的去除率均超过 98%。
