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研究了脉冲电强化微电解流化床技术去除铅锌浮选废水中的锌及丁基黄药,考察不同溶液初始pH值和反应器中不同电流密度、脉冲周期及极板间距对模拟废水中锌和丁基黄药的去除效果,采用扫描电镜(SEM)和X射线衍射能谱仪(XRD)进行填料表面特征、物相和形态分析,并对废水中锌和丁基黄药的去除过程和降解途径进行探究。结果表明,在pH值为4、电流密度为20 m A·cm~(-2)、脉冲周期为2 s、极板间距为5 mm的最佳条件下,废水中锌和丁基黄药去除率分别达99.53%和99.03%。锌主要通过电催化还原沉积和铁羟基聚合物絮凝去除,而丁基黄药则被体系电催化原位生成的H_2O_2、羟基自由基氧化降解矿化,以及铁羟基聚合物絮凝去除。
The pulsed electrospray micro-electrolysis fluidized bed technology was used to remove zinc and butyl xanthate in lead-zinc flotation wastewater. The effects of different initial pH values and different current density, pulse period and plate spacing on the simulated wastewater Zinc and butyl xanthate were removed and characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) on the surface, phase and morphology of the filler, and the removal of zinc and butyl xanthate And degradation pathways to explore. The results showed that the removal of zinc and butyl xanthate in waste water under the optimal conditions of pH 4, current density 20 m A · cm -2, pulse period 2 s, and plate spacing 5 mm Rates were 99.53% and 99.03% respectively. Zinc is mainly deposited by electrocatalytic reduction and flocculation of iron-hydroxyl polymer, but butyl xanthate is oxidized by H 2 O 2 generated by the electrocatalysis of the system in situ, oxidatively degraded and mineralized by hydroxyl radicals, and flocculated by iron-hydroxyl polymer.