Photodegradation of Organic Pollutants in Wastewater under Free of Dissolved Oxygen

无溶解氧条件下废水中有机污染物的光降解

• 批准号: 15510070
• 负责人: TAGUCHI Shigeru
• 金额: $ 2.3万
• 依托单位: Toyama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15510070/
• 关键词: photodegradation by UV; wastewater treatment; organic pollutants; free of DO; degradation rate; effect of inorganic salts; benzene derivatives; EDTA; 廃水処理; 安息香酸; 四塩化炭素; 無機塩の効果; 有機化合物の分解; EDTA錯体; 芳香族化合物; 置換基効果; 有機塩素化合物

Photodegradation of several organic substances by UV irradiation was demonstrated in the presence and absence of dissolved oxygen (DO). The degradation rate constants were determined to evaluate the effect of DO on the photodegradation.(1)Photodegradation of several benzene derivatives in the absence of dissolved oxygen was performed. The effect of substituent on the degradation rate was, NH_2<OH<CH_3<H<Cl>Br>COOH>NO_2. The Cl, Br, COOH derivatives produced benzene as an intermediate compound. On the other hand, NH_2, OH, CH_3 did not give benzene in their degradation processes. It is clear that the degradation mechanisms are quit different between the two derivative groups. The groups of Cl and Br drastically promoted their degradation rate, about 3 times, in the absence of DO.(2)The UV irradiation method was not effective for the degradation of EDTA and EDTA-Mn, Zn, Ni chelates in the presence and absence of DO.(3)It was found that inorganic salts, such as Na_2SO_4, K_2SO_4 promote the photo-degradation of organic materials by UV.

在存在和不存在溶解氧（DO）的情况下，几种有机物质的紫外光照射的光降解证明。通过测定降解速率常数，研究了DO对光降解的影响。（1）在无溶解氧的条件下，对几种苯衍生物进行了光降解。取代基对降解率的影响顺序为：NH_2&lt;OH&lt;CH_3&lt;<Cl>HBr&gt;COOH&gt;NO_2。氯、溴、羧基衍生物产生苯作为中间化合物。NH_2、OH、CH_3在降解过程中不产生苯。很明显，这两种衍生物的降解机制是完全不同的。Cl和Br的基团大大促进其降解速率，约3倍，在没有DO的情况下。（2）在有DO和无DO的条件下，紫外光照射法对EDTA和EDTA-Mn，Zn，Ni螯合物的降解效果不明显。(3)It无机盐如Na_2SO_4、K_2SO_4对有机物的紫外光降解有促进作用。

项目成果

Photodegradation of aromatic compounds in wastewater under free of dissolved oxygen

无溶解氧条件下光降解废水中芳香族化合物

• 发表时间: 2003
• 期刊: Journal of Ecotechnology Research 9
• 作者: Yoshida M;Maekawa A et al.;Hideaki Maezawa
• 通讯作者: Hideaki Maezawa

Photodegradation of aromatic compounds in wastewater under free of oxygen

无氧条件下光降解废水中芳香族化合物

• 发表时间: 2003
• 期刊: J.Echotechnology Research 9(3)
• 作者: H.Maezawa;T.Kaswakami;N.Hata;S.Taguchi;H.Shirayama
• 通讯作者: H.Shirayama

Hideaki Maezawa: "Photodegradation of Aromatic Compounds in Waste Water under Free of Dissolved Oxygen"Journal of Ecotechnology Research. 9巻・3号. S234-S235 (2003)

Hideaki Maezawa：“无溶解氧下废水中芳香族化合物的光降解”生态技术研究杂志第 9 卷，第 3 期。S234-S235 (2003)