Photodegradation of Chlorinated Organic Pollutants in Wastewater in the Absence of Dissolved Oxygen

无溶解氧条件下废水中含氯有机污染物的光降解

• 批准号: 13680641
• 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: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13680641/
• 关键词: photodegradation; chlorinated organic pollutants; wastewater treatment; ultraviolet; water pollution; free of dissolved oxygen; hydrocarbons; VOCs; 無酸素紫外線分解; クロロベンゼン; 芳香族塩素化合物; 光分解の除酸素効果; 無害化処理; 紫外線分解; 排水処理; 無酸素光分解; テトラクロロエチレン; 四塩化炭素; ペン

Photodegradation of organic pollutants of chlorinated aliphatic and aromatic hydrocarbons in water by irradiation of ultraviolet aiming a wastewater treatment was studied. The point of this study is to propose a novel technique of photodegradation of the compounds under free of dissolved oxygen (DO). The results obtained by this study are as follows.(1) The irradiation of ultraviolet (wavelength of 185nm + 254nm) without DO remarkably accelerated the degradation rates of aliphatic compounds having only single bond in their structures, such as carbon tetrachloride, chloroform, 1,2-dichloroethane, 1,1,1-trichloroethane, and 1,1,2-trichloroethane. Removing DO was not so effective for tetrachloroethylene, trichloroethylene and chlorobenzene having double bond in their structures.(2) The irradiation of ultraviolet (185nm + 254nm) to water saturated with oxygen caused the decrease of DO. On the other hand ultraviolet of 254nm did not cause such decrease of DO.(3) These results strongly lead us to a following conclusion for photodegradation under free of DO. The energy of ultraviolet of 185nm is strong enough to break the bond of hydrocarbons directly. In the presence of DO, however, the energy is consumed by DO to be converted into other species.This study shows us a high potential of this novel technique for wastewater treatment.

以废水处理为研究对象，研究了紫外光照射对水中有机污染物氯代烃和芳香烃的光降解作用。本研究的重点是提出一种在无溶解氧(DO)条件下光降解化合物的新技术。研究结果表明：(1)紫外光(波长185 nm+254 nm)对四氯化碳、氯仿、1，2-二氯乙烷、1，1，1-三氯乙烷、1，1，2-三氯乙烷等结构只有单键的脂肪族化合物的降解有显著的促进作用。对于结构中含有双键的四氯乙烯、三氯乙烯和氯苯，去除DO的效果不是很好。(2)紫外光(185 nm+254 nm)照射到含氧饱和的水中，使DO降低。另一方面，254 nm的紫外光没有引起DO的降低。(3)这些结果有力地引导了我们在无DO条件下的光降解。185 nm的紫外光能量强到足以直接破坏碳氢化合物的键。然而，在DO存在的情况下，DO消耗的能量被转化为其他物种。本研究向我们展示了这一新技术在废水处理中的巨大潜力。

项目成果

白山 肇: "紫外線照射光分解における溶存酸素除去の有効性 -クリーニング事業所廃液中のテトラクロロエチレンの水処理技術-"水環境学会誌. 24巻. 513-519 (2001)

Hajime Hakuyama：“紫外线照射光解中溶解氧的去除效果-清洁工业废水中四氯乙烯的水处理技术-”水环境学会杂志第 24 卷。513-519（2001 年）。

Hideaki Maezawa: "Photodegradation of Chlorinated Organic Compounds under Free of Dissolved Oxygen"Journal of Ecotechnology Research. 8巻. 38-39 (2002)

Hideaki Maezawa：“不含溶解氧的氯化有机化合物的光降解”生态技术研究杂志第 8 卷 38-39 (2002)。

H. Maezawa, K. Tsukagoshi, N. Hata, I. Kasahara, S. Taguchi and H. Shirayama: "Photodegradation of Chlorinated Organic Compounds in Wastewater under Free of Dissolved Oxygen"J. Ecotechnology Research. 8(2). 38-39 (2002)

H. Maezawa、K. Tsukagoshi、N. Hata、I. Kasahara、S. Taguchi 和 H. Shirayama：“无溶解氧条件下废水中氯化有机化合物的光降解”J。

Hideaki Maezawa: "Photodegradation of Chlorinated Organic Compounds in Wastewater under Free of Dissolved Oxygen"Journal of Ecotechnology Research. 8巻・5号. 38-39 (2002)

Hideaki Maezawa：“不含溶解氧的废水中氯化有机化合物的光降解”生态技术研究杂志第 8 卷，第 5 期。38-39 (2002)。

Hajime Shirayama: "Photodegradation of Chlorinated Hydrocarbons in the Presence and Absence of Dissolved Oxygen in Water"Water Research. 35巻8号. 1941-1950 (2001)

Hajime Shirayama：“水中存在和不存在溶解氧时氯化烃的光降解”水研究，第 35 卷，第 8 期。1941-1950 (2001)