Application of Ozone Related Processes to Mineralize Tetramethyl Ammonium Hydroxide in Aqueous Solution

被引:13
作者
Chiou, Chyow-San [1 ]
Chuang, Kai-Jen [2 ,3 ]
Lin, Ya-Fen [1 ]
Chen, Hua-Wei [4 ]
Ma, Chih-Ming [4 ]
机构
[1] Natl Ilan Univ, Dept Environm Engn, Ilan 260, Taiwan
[2] Taipei Med Univ, Sch Med, Dept Publ Hlth, Coll Med, Taipei 110, Taiwan
[3] Taipei Med Univ, Sch Publ Hlth, Coll Publ Hlth & Nutr, Taipei 110, Taiwan
[4] St Marys Jr Coll Med Nursing & Management, Dept Cosmet Applicat & Management, Yilan 266, Taiwan
关键词
WASTE-WATER; OZONATION; OXIDATION; PEROXIDE;
D O I
10.1155/2013/191742
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Tetramethyl ammoniumhydroxide (TMAH) is an anisotropic etchant used in thewet etching process of the semiconductor industry and is hard to degrade by biotreatments when it exists in wastewater. This study evaluated the performance of a system combined with ultraviolet, magnetic catalyst (SiO2/Fe3O4) and O-3, denoted asUV/O-3, to TMAH in an aqueous solution. The mineralization efficiency of TMAH under various conditions follows the sequence: UV/O-3 > UV/H2O2/O-3 > H2O2/SiO2/Fe3O4/O-3 > H2O2/O-3 > SiO2/Fe3O4/O-3 > O-3 > UV/H2O2. The results suggest that UV/O-3 process provides the best condition for the mineralization of TMAH (40mg/L), resulting in 87.6% mineralization, at 60 min reaction time. Furthermore, the mineralization efficiency of SiO2/Fe3O4/H2O2/O-3 was significantly higher than that of O-3, H2O2/O-3, and UV/H2O2. More than 90% of the magnetic catalyst was recovered and easily redispersed in a solution for reuse.
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页数:7
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