Thiruvenkatachari Ramesh, Kwon Tae Ouk, Jun Jung Chul, Balaji Subramanian, Matheswaran Manickam, Moon Il Shik
Department of Chemical Engineering, Sunchon National University, 315 Maegok Dong, Suncheon 540-742, Chonnam, Republic of Korea.
J Hazard Mater. 2007 Apr 2;142(1-2):308-14. doi: 10.1016/j.jhazmat.2006.08.023. Epub 2006 Aug 18.
Terephthalic acid (TPA) is widely applied as a raw material in making polyester fiber, polyethylene terephthalate (PET) bottles, polyester films, etc. TPA is toxic and is known to act as endocrine disruptor. TPA wastewater is traditionally treated by biological process and this study aims to evaluate the effectiveness of several advanced oxidation processes on TPA removal. The oxidation processes studied were: UV-TiO(2), UV-H(2)O(2), UV-H(2)O(2)-Fe, O(3), O(3)/Fe, O(3)/TiO(2), UV-O(3)-H(2)O(2)-Fe and UV-O(3)-H(2)O(2)-Fe-TiO(2). The results indicate that the time required for the complete destruction of 50 ppm of TPA can be minimized from 10h using UV-TiO(2) system, to less than 10 min by UV-H(2)O(2)-Fe-O(3) system. Some of the likely organic intermediates identified during TPA destruction include, benzoquinone, benzene, maleic acid and oxalic acid. Possible destruction pathway of TPA has been proposed. TPA degradation by various systems was also analyzed based on the reaction kinetics and operating costs.
对苯二甲酸（TPA）作为一种原材料被广泛应用于制造聚酯纤维、聚对苯二甲酸乙二酯（PET）瓶、聚酯薄膜等。TPA具有毒性，并且已知其具有内分泌干扰特性。传统上TPA废水通过生物工艺进行处理，而本研究旨在评估几种高级氧化工艺对TPA去除的效果。所研究的氧化工艺包括：UV-TiO₂、UV-H₂O₂、UV-H₂O₂-Fe、O₃、O₃/Fe、O₃/TiO₂、UV-O₃-H₂O₂-Fe以及UV-O₃-H₂O₂-Fe-TiO₂。结果表明，将50 ppm的TPA完全分解所需的时间可以从使用UV-TiO₂系统时的10小时缩短至使用UV-H₂O₂-Fe-O₃系统时的不到10分钟。在TPA分解过程中鉴定出的一些可能的有机中间体包括苯醌、苯、马来酸和草酸。已经提出了TPA可能的分解途径。还基于反应动力学和运行成本对不同系统中TPA的降解情况进行了分析。
