Degradation of biotansformation products of nonylphenol ethoxylates by ozonation and UV/TiO2 treatment.
Degradation of biotansformation products of nonylphenol ethoxylates by ozonation and UV/TiO2 treatment.
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通过臭氧化和 UV/TiO2 处理降解壬基酚聚氧乙烯醚的生物转化产物。
DOI：
10.2166/wst.2002.0727
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
M. Fujita
中科院分区：
文献类型：
--
作者：
M. Ike;M. Asano;F. Belkada;S. Tsunoi;M. Tanaka;M. Fujita
使用实验室规模的反应器研究了壬基酚聚乙氧基化物 (NPEO)、壬基酚 (NP)、壬基酚单乙氧基化物 (NP1EO) 和壬基苯氧基羧酸 (NP1EC) 生物转化产物通过臭氧化和 UV/TiO2（在二氧化钛悬浮液作为催化剂存在下的紫外光催化降解）的降解动力学。在测试的 NPEOs 代谢物中，UV/TiO2 对 NP 的降解率最高，而 NP1EC 的降解率最低。相比之下，臭氧化对于分解 NP1EC 特别有效。臭氧也可以有效降解 NP，但对 NP1EO 的分解效果较差。两种化学氧化过程对纳米粒子的降解均遵循一级动力学。 NP1EO 和 NP1EC 的降解曲线也可以近似地用一级动力学描述，尽管 NP1EC 的臭氧化降解似乎遵循二级动力学。
The degradation kinetics of biotransformation products of nonylphenol polyethoxylates (NPEOs), nonylphenol (NP), nonylphenol monoethoxylate (NP1EO) and nonylphenoxy carboxylic acid (NP1EC), by ozonation and UV/TiO2 (ultraviolet photocatalytic degradation in the presence of titanium dioxide suspension as a catalyst) were investigated using lab-scale reactors. The degradation rate of NP by UV/TiO2 was the highest among the tested NPEOs metabolites, while NP1EC showed the lowest degradation rate. In contrast, ozonation was especially effective for the breakdown of NP1EC. NP could be also degrade efficiently by ozonation, however, it was much less effective for NP1EO decomposition. Degradation of NP by both chemical oxidation processes followed first-order kinetics. The degradation curves of NP1EO and NP1EC could be approximately described by first-order kinetics also, although the degradation of NP1EC by ozonation seemed to follow a second-order kinetic.