离子交换法回收电解金属锰废水中锰的研究

为了验证离子交换树脂在电解金属锰废水行业中的应用效果，通过静态吸附实验、中试动态实验的方法，研究了不同类型离子交换树脂对锰离子的吸附性能及回收特性。结果表明，离子交换树脂对锰离子有一定的交换吸附能力，且同类树脂对各二价金属离子选择性无明显区别，其中各树脂对二价金属离子的吸附能力：D113〈732〈D851。经过一次再生后，离子交换树脂交换吸附能力下降，之后进行多次再生后，其交换吸附能力基本趋于稳定，钙离子对离子交换树脂的再生一吸附有较大负面影响。洗脱液中锰离子浓度最高可达20000mg／L以上。

A Study on the Recovery of Manganese from Wastewater by Ion Exchange Resin

In order to verify the ion exchange resin applying in the wastewater of manganese industry, different types of ion exchange resin were used to adsorb Mn2＋ ions through the static adsorption experiments and pilot experiments. The results show that the ion exchange resin can adsorb Mn2＋ ion, but it can present no significant selectivity in divalent metal ion, wherein the adsorption capacity is D113 〈732 〈 D851. After the first regeneration, the exchange adsorption capacity of the ion exchange resin is decreased. In multiple regenerations, the exchange of adsorption ability tends is stable. Ca~ ~ ions has its negative influence on the adsorption and desorption process of the ion exchange resin. The concentration of Mn2~ ions in effluent is up to 20 000 mg/L or more.