摘要
研究了Fe2+/UV催化臭氧对腈纶废水的降解特性,分析了Fe2+与O3的质量浓度比([Fe2+]/[O3])、气相臭氧质量浓度和紫外光强对Fe2+/UV催化臭氧降解腈纶废水效果的影响,讨论了Fe2+/UV催化臭氧工艺中光催化反应动力学特征,并利用红外光谱表征了降解后腈纶废水中有机物基团的变化。结果表明,当[Fe2+]/[O3]为3.2～3.8、气相臭氧质量浓度为20～30mg/L和光量子流密度为8.62×10-12Einstein时,腈纶废水降解效果较好。Fe2+/UV催化臭氧工艺降解腈纶废水的反应符合类一级动力学反应,腈纶废水初始COD值在320～400mg/L范围内时,一级反应速率常数在0.01518～0.01762min-1范围。温度对Fe2+/UV催化臭氧降解腈纶废水反应的影响具有双重性,温度在25～30℃范围时,降解反应最快。经Fe2+/UV催化臭氧处理后,腈纶废水中有机基团被有效降解。
The oxidation degradation of acrylic fibers wastewater was studied by Fe2＋/UV catalysis ozonation process. The influencing factors to the oxidation capacity of process were discussed in detail, such as the mass concentration ratio of Fe2＋ to Oa（[Fe2＋]/[O3]）, gas phase ozone mass concentration and UV light intensity. Photo-catalysis kinetic characteristic of this process was analyzed, and evolution of organic functional groups in acrylic fibers wastewater after treatment was characterized according to infrared spectrometry analysis. The results showed that when [-Fe2＋ ]/ O3 was in the range of 3. 2- 3. 8, gas phase ozone concentration was in the range of 20- 30 mg/L, and photon flux density was 8.62× 10-12 Einstein, the oxidation degradation of acrylic fibers wastewater could reach the best one. The reaction of oxidation degradation in Fe2＋/UV catalysis ozonation process proceeded in accordance with a pseudo first order kinetics, and the first- order rate constant was in the range of 0. 01518--0. 01762 min 1, while the initial COD of acrylic fibers wastewater was in the range of 320--400 mg/L. Temperature had two-side influence to the reaction rate in Fe2＋/UV catalysis ozonation process. The reaction rate reached its maximum value as temperature in the range of 25--30℃. Organic compounds in acrylic fibers wastewater could be effectively degraded by Fe2＋/UV catalysis ozonation process.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2009年第6期896-903,共8页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
中国石油天然气股份有限公司科技风险创新基金项目(0706D01040405)
大庆高新区创新基金研发项目(DQGX08YF016)资助
