紫外光激活过一硫酸氢盐处理焦化废水生化出水的研究

Treatment of bio-treated coking wastewater by UV-activated peroxymonosulfate

采用紫外光(UV)激活过一硫酸氢盐(PMS)处理焦化废水生化出水,考察了初始pH、PMS浓度、紫外光强度和温度对焦化废水生化出水中总有机碳(TOC)、色度和UV254去除效果的影响。结果表明,在反应时间为60 min、PMS浓度为11 mmol/L、初始pH为3、紫外光强度为9.94 m W/cm^2和温度为25℃的最佳条件下,TOC、色度和UV(254)的去除率分别为65.7%、99.5%和93.9%。三维荧光光谱分析结果表明,焦化废水生化出水中类富里酸和类腐殖酸被有效分解。

Bio-treated coking wastewater is treated again by UV activated peroxymonosulfate(PMS).The effects of initial pH,PMS concentration,UV light intensity and temperature on the removal efficiencies of total organic carbon(TOC),chroma and UV 254 in bio-treated coking wastewater are studied.The results indicate that the removal rates of TOC,chroma and UV 254 are 65.7%,99.5%,and 93.9%,respectively under the optimal conditions that the reaction lasts for 60 min,PMS concentration is 11 mmol·L^-1,initial pH is 3,UV light intensity 9.94 mw·cm^-2 and the temperature maintains at 25℃.Analysis results from three-dimensional fluorescence spectra indicate that fulvic acid-like substances and humic acid-like substances in bio-treated coking wastewater has effectively been decomposed.