芬顿试剂氧化降解丁基黄药废水实验研究

Experimental Study on Oxidative Degradation of Butyl Xanthate Wastewater by Fenton Reagent

丁基黄药因其捕收能力较强,在矿石浮选中具有较好的选择性能而作为主要的金属硫化矿捕收剂之一。因此含丁基黄药废水的降解处理受到相关工作者的广泛关注。本文以含丁基黄药模拟废水为研究对象,探讨不同降解条件下对其降解率的影响。结果表明,无论单独亚铁离子还是单独双氧水,其产生羟基自由基的数量均非常少,无法氧化降解丁基黄药。亚铁+双氧水+光照体系对丁基黄药的氧化降解作用较好。随着丁基黄药初始浓度的升高,丁基黄药氧化降解效率降低。在氯化亚铁2 mg~8 mg范围内,随着氯化亚铁投加量的提高,丁基黄药降解率也随之提高。在双氧水20μL~60μL范围内,随着双氧水投加量的提高,丁基黄药降解率也随之提高。随着溶液pH值的升高,初始浓度为20 mg/L的丁基黄药其氧化降解率随之降低。

Butyl xanthoxanthate is one of the main collectors of metal sulfide ores because of its strong collecting ability and better selective performance in ore flotation.Therefore,the degradation treatment of wastewater containing butyl xanthate has been widely concerned by relevant workers.In this paper,the effect of different degradation conditions on the degradation rate of butyl xanthate simulated wastewater was studied.The results showed that the number of hydroxyl radicals produced by either ferrous ion alone or hydrogen peroxide alone was very small,and the butyl xanthate could not be oxidized and degraded.The oxidative degradation of butyl xanthoxanthate was better by ferrous+hydrogen peroxide+light system.With the increase of initial concentration of butyl xanthate,the oxidative degradation efficiency of butyl xanthate decreased.In the range of 2 mg~8 mg ferrous chloride,the degradation rate of butyl xanthate increased with the increase of ferrous chloride dosage.In the range of 20μL~60μL hydrogen peroxide,the degradation rate of butyl xanthoxanthate increased with the increase of hydrogen peroxide dosage.With the increase of pH value of solution,the oxidative degradation rate of butyl xanthate with initial concentration of 20 mg/L decreased.