摘要
采用UV/Fenton氧化技术对混凝-厌氧污泥处理后的漂白废水进行深度处理,以去除残余污染负荷并降低废水的生物抑制性.通过响应面设计优化反应体系参数,利用气相色谱-质谱联用仪研究废水中有机污染物的降解历程.得到最佳反应条件为:pH3.8、H2O2用量30 mmol/L、H2O2/Fe(II)物质的量比60∶7、反应时间120 min,在该条件下,废水的化学需氧量去除率达到最大值88.2%.同时发现:漂白废水中的芳香化合物、多环芳烃和有机氯化物等有毒物质与Fenton试剂产生的.OH自由基发生氧化反应而降解为低分子质量的有机酸;UV/Fenton处理后废水的生物抑制性明显降低,可生化指数大幅提高.
UV/Fenton oxidation technology was adopted to eliminate the residual pollutants and promote the biodegradability of the coagulation-anaerobic pretreated bleaching effluents,and the response surface methodology was used to optimize the operation conditions.Then,the GC/MS was employed to investigate the degradation process of organic pollutants in the bleaching effluents.The results show that,in the optimal operation conditions,namely,a pH value of 3.8,a H2O2 concentration of 30 mmol/L,a H2O2 /Fe（Ⅱ） molar ratio of 60∶ 7 and a reaction duration of 120 min,the COD removal reaches the maximum 88.2%.Moreover,it is indicated that,with the help of the hydroxyl radicals generated from Fenton reagent,aromatics,polycyclic aromatic hydrocarbons and organic chlorides with high toxicity in the effluents all degrade into organic acids with low molecular mass,and that UV/Fenton treatment greatly weakens the biological inhibition and improves the biodegradability index of the effluents.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第1期79-83,99,共6页
Journal of South China University of Technology(Natural Science Edition)
基金
国家"863"计划项目(B11B1080090)
制浆造纸工程国家重点实验室自主创新项目(2007ZD01)
关键词
废水处理
漂白
高级氧化
FENTON试剂
降解机理
可生化性
wastewater treatment
bleaching
advanced oxidation
Fenton reagent
degradation mechanism
biodegradability
