微波活化过硫酸盐降解典型选矿药剂丁基黄药的研究

为解决传统选矿废水中有机选矿药剂污染的问题,采用微波活化过硫酸盐技术氧化降解丁基黄药,分别考察了微波功率、过硫酸钾浓度、丁基黄药浓度及pH等因素对丁基黄药降解效果影响。结果表明,在微波活化过硫酸盐体系中,提高微波辐射时间和功率,以及增加过硫酸盐用量可以提高丁基黄药的降解率；丁基黄药在酸性条件下比在碱性条件下降解效果好。废水中存在的主要阴离子HCO3-,Cl-和SiO32-对丁基黄药的降解影响较小,但腐殖酸的存在对丁基黄药的降解具有一定的抑制作用。反应90 min后,微波活化过硫酸盐体系中TOC的去除率可以达到47.74%。通过自由基捕获实验证明微波活化过硫酸盐体系中参与降解丁基黄药的主要活性自由基是·SO4-。

STUDY ON THE DEGRADATION OF BUTYL XANTHATE BY MICROWAVE ACTIVATED PERSUlLFATE

In this study, in order to solve the problem of contaminants in traditional ore dressing wastewater, the degradation of butyl xanthate was studied by microwave activated persulfate oxidation technology. The effects of microwave power, potassium persulfate concentration, butyl xanthate concentration and pH were discussed in detail. The experimental date showed that in the microwave activated persulfate system, the degradation rate of butyl xanthate can be increased by increasing the time and power of microwave radiation and the amount of persulfate; The degradation effect of butyl xanthate in acidic condition was better than that in alkaline condition. The presence of bicarbonate ion, silicate ion and chloride ion in water had little effect on the degradation of butyl xanthate, but the presence of humic acid had a certain inhibitory effect on the degradation of butyl xanthate. Through TOC analysis, the removal rate of TOC in the microwave activated persulfate system was 47.74% at 90 min. The main active free radical involved in the degradation of butyl xanthate in the microwave activated persulfate system was ·SO4-.