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首页> 外文期刊>Journal of Advanced Oxidation Technologies >Photocatalytic Oxidation of Emerging Contaminants:Kinetics and Pathways for Photocatalytic Oxidation of Pharmaceutical Compounds
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Photocatalytic Oxidation of Emerging Contaminants:Kinetics and Pathways for Photocatalytic Oxidation of Pharmaceutical Compounds

机译：新兴污染物的光催化氧化：药物化合物光催化氧化的动力学和途径

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摘要

The rates and products of photooxidation of ibuprofen,clofibric acid,diclofenac and naproxen,Pharmaceuticals emerging as contaminants in wastewater,were examined in UV-irradiated TiO_2 suspensions.Emphasis was on ibuprofen absorption on TiO_2 and its oxidation rate and pathways.Both absorption and oxidation of ibuprofen decreased with increasing pH above 3,consistent with preadsorption of ibuprofen on TiO_2 as an essential step in the oxidation process.Sec-butylacetophenone and sec-butylphenethyl alcohol were identified as products indicating that part of the oxidation proceeds via electron transfer from the carboxylate group to valence band holes on TiO_2.Ring oxidation products were not found.Oxidation half lives of 0.1 mM naproxen,ibuprofen,clofibric acid,and diclofenac in 0.4% TiO_2 were 7,14,16 and 20 min,respectively;kinetics follow Langmuir-Hinshelwood rate laws.
机译：在紫外线辐照的TiO_2悬浮液中检测了布洛芬，Clofic酸，双氯芬酸，丁香酸，双氯芬酸丁芬和萘普生的光氧化的速率和产物，作为废水中的污染物，在TiO_2上对布洛芬的吸收，氧化率和途径。吸收和氧化在氧化率和氧化率上。吸收和氧化 随着pH值的增加，布洛芬的含量增加，与氧化过程中的必需步骤一致。氧化方法中的必需步骤。将其丁基乙酮和仲丁基乙基醇鉴定为表明氧化部分通过从羧酸盐的电子转移进行的产物 基于TiO_2.ring氧化产物的基因孔隙孔未发现。氧化半衰期为0.1mm的萘普生，布洛芬，Cloficibric酸和0.4％TiO_2的二氯芬酸分别为7,14,16和20分钟;动力学关注Langmuir- Hinshelwood评价法。

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