摘要
引言国内外的研究表明,常规的混凝、沉淀、过滤等水处理工艺对大量有机污染物特别是溶解态有机物的去除率甚微,仅能达到20%～30%[1],随着水质标准的不断提高。
Synthetic goethite（FeOOH） prepared in laboratory was evaluated for FeOOH/H2O2 catalytic activity removing para-chloronitrobenzene（p-CNB） in water.The pathway of degradation was deduced from the effect of tert-butanol on the catalytic reaction and the performance comparison with some related reactions.Effects of catalyst and oxidant doses,as well as the factors associated with water quality such as initial pH of solution,HCO-3 alkalinity and humic acids,on p-CNB removal in FeOOH/ H2O2 system were also examined.The results show that FeOOH has high catalytic activity on H2O2 decomposition for removing p-CNB in water.Tert-butanol could effectively inhibit the oxidation of p-CNB in FeOOH/H2O2 system,indicating the catalytic oxidation reaction follows a hydroxyl radical pathway.Under the optimal reaction conditions of pH value in the range of 4.0—6.0,dosage of 333 mg·L-1 FeOOH and 6.6 mg·L-1 of H2O2,the removal efficiency of p-CNB is more than 80% after 30 minutes in this experiment.Both bicarbonate and humic acid have inhibitory effect on p-CNB removal,and the higher bicarbonate and humic aid concentration are,the stronger the inhibitory effect is.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2012年第1期272-278,共7页
CIESC Journal
基金
教育部高等学校博士点专项科研基金(200802131055)
哈尔滨工业大学城市水资源与水环境国家重点实验室开放基金项目(QA201019)
水体污染控制与治理科技重大专项(2009ZX07424-004-06)~~
关键词
羟基氧化铁
非均相芬顿
对氯硝基苯
羟基自由基
synthetic goethite
heterogeneous Fenton
para-chloronitrobenzene
hydroxyl radical
