三氯生在光解时可能会产生二(噁)英类物质,因而它在日用化学品中的安全性受到学术界的广泛关注.本文采用高效液相色谱-电喷雾质谱研究了三氯生在紫外光照射下的光聚合反应,通过对产物的准分子离子分析,初步确定了7种光聚合产物.聚合物的分子离子分别为505、540、792,且有同分异构体存在,其异构体个数分别为2个、3个和2个.这些物质的产生主要由三氯生分子间脱除氯化氢、分子上脱除氯离子等过程来聚合完成.在光解溶液中也测到2,8-二氯代二苯并-对-二(噁)英,该物质则是通过分子自身脱除氯化氢而环化产生.同时应用液相色谱定性分析了不同光源对光聚物产生及含量变化的影响.结果表明,三氯生的光聚合反应受光源的影响显著,UVB比UVA更易产生聚合反应.
参考文献
| [1] | K. Bester .Triclosan in a sewage treatment process―balances and monitoring data[J].Water research: A journal of the international water association,2003(16):3891-3896. |
| [2] | Darius Sabaliunas;Simon F. Webb;Armin Hauk;Martin Jacob;William S. Eckhoff .Environmental fate of Triclosan in the River Aire Basin, UK[J].Water research: A journal of the international water association,2003(13):3145-3154. |
| [3] | Heinz Singer;Stephan Muller;Celine Tixier;Laurent Pillonel .Triclosan: occurrence and fate of a widely used biocide in the aquatic environment: field measurements in wastewater treatment plants, surface waters, and lake sediments[J].Environmental Science & Technology: ES&T,2002(23):4998-5004. |
| [4] | Adolfsson-Erici M.;Pettersson M.;Parkkonen J.;Sturve J. .Triclosan, a commonly used bactericide found in human milk and in the aquatic environment in Sweden[J].Chemosphere,2002(9/10 Special):1485-1489. |
| [5] | Allmyr M;Adolfsson-Erici M;McLachlan MS;Sandborgh-Englund G .Triclosan in plasma and milk from Swedish nursing mothers and their exposure via personal care products[J].Science of the Total Environment,2006(1):87-93. |
| [6] | Aranami K;Readman JW .Photolytic degradation of triclosan in freshwater and seawater[J].Chemosphere: Environmental toxicology and risk assessment,2007(2):1052-1056. |
| [7] | Milagros Mezcua;M.Jose Gomez;Imma Ferrer;M.Dolores Hernando;Amadeo R.Fernandez-Alba .Evidence of 2,7/2,8-dibenzodichloro-p-dioxin as a photodegradation product of triclosan in water and wastewater samples[J].Analytica chimica acta,2004(1/2):241-247. |
| [8] | Latch D E;Packer J L;Stender B L et al.Aqueous photochemistry of triclosan:formation of 2,4-dichlorophenol,2,8 dichlorodibenzo-p-dioxin and oligomerization products[J].Environmental Toxicology and Chemistry,2005,24:517-525. |
| [9] | Wong-Wah-Chung P;Rafqah S;Voyard G;Sarakha M .Photochemical behaviour of triclosan in aqueous solutions: Kinetic and analytical studies[J].Journal of Photochemistry and Photobiology, A. Chemistry,2007(2/3):201-208. |
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