Degradation of triclosan by an integrated nano-bio redox process

被引：71

作者：

Bokare, Varima ^{[1
]}

Murugesan, Kumarasamy ^{[1
]}

Kim, Young-Mo ^{[1
]}

Jeon, Jong-Rok ^{[1
]}

Kim, Eun-Ju ^{[1
]}

Chang, Yoon Seok ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, Sch Environm Sci & Engn, Pohang 790784, South Korea

来源：

BIORESOURCE TECHNOLOGY | 2010年 / 101卷 / 16期

关键词：

Triclosan; Pd/nFe; Laccase; 2-Phenoxyphenol; Redox process; ENDOCRINE-DISRUPTING CHEMICALS; WASTE-WATER TREATMENT; OXIDATIVE TRANSFORMATION; AQUATIC ENVIRONMENT; SURFACE WATERS; METAL-IONS; LACCASE; MEDIATORS; PRODUCTS; DECOLORIZATION;

D O I：

10.1016/j.biortech.2010.03.062

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

In this study, a sequential reduction-oxidation method was developed for complete degradation of triclosan (2,4,4'-trichloro-2'-hydroxydiphenyl ether, TCS) in aqueous solution. Rapid reductive dechlorination of TCS was achieved with palladized zero-valent iron nanoparticles (Pd/nFe), under anaerobic conditions, with generation of 2-phenoxyphenol as the sole dechlorination product. Sequentially, 2-phenoxyphenol was transformed into a non-toxic polymer using laccase (EC:1.10.3.2) derived from Trametes versicolor in the presence of natural redox mediator syringaldehyde (SYD). High performance liquid chromatography combined with electrospray ionization mass spectroscopy (HPLC-ESI-MS) revealed the formation of dimer and trimer products during the laccase-mediated transformation process. The efficiency of the integrated method is critically dependent on the Fe2+ concentration, which was effectively controlled by optimizing the solution pH. To the best of our knowledge, this is the first report of a redox two-step hybrid system for the complete transformation of TCS into non-toxic products. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：6354 / 6360

页数：7

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