Degradation of dimethyl phthalate using a liquid phase plasma process with TiO2 photocatalysts

被引：23

作者：

Lee, Heon ^{[1
]}

Park, Young-Kwon ^{[2
]}

Kim, Jung-Sik ^{[3
]}

Park, Yung-Hoon ^{[4
]}

Jung, Sang-Chul ^{[1
]}

机构：

[1] Sunchon Natl Univ, Dept Environm Engn, 255 Jungang Ro, Sunchon 57922, Jeonnam, South Korea

[2] Univ Seoul, Sch Environm Engn, 163 Seoulsiripdaero, Seoul 02504, South Korea

[3] Univ Seoul, Dept Mat Sci & Engn, 163 Seoulsiripdaero, Seoul 02504, South Korea

[4] Sunchon Natl Univ, Dept High Polymer Engn, 255 Jungang Ro, Sunchon 57922, Jeonnam, South Korea

来源：

ENVIRONMENTAL RESEARCH | 2019年 / 169卷

基金：

新加坡国家研究基金会;

关键词：

Decomposition rate; Degradation reaction pathway; Hydrogen peroxide; Hydroxyl radicals. Synergy effect; ACID ESTERS; PAES;

D O I：

10.1016/j.envres.2018.11.025

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The liquid phase plasma (LPP) method with a TiO2 photocatalyst and hydrogen peroxide was used to decompose dimethyl phthalate (DMP). As the applied voltage, pulse width, and frequency were increased, the rate of decomposition was increased and the decomposition rate was 63% for 180 min under plasma optimum conditions. The addition of TiO2 photocatalyst and hydrogen peroxide increased the DMP decomposition reaction rate, but an excess cause a decrease in decomposition rate due to a decrease in conductivity, blocking of ultraviolet light, and scavenger effect. When the TiO2 photocatalyst and hydrogen peroxide were used together, the decomposition reaction rate of DMP was greatly improved by using LPP single process alone. Also, when all the processes were used at the same time, the decomposition reaction rate was improved to about 2.8 times. DMP undergoes bond cleavage and ultimately decomposes into CO2 and H2O via dimethyl 4-hydroxyphthalate and methyl salicylates due to hydroxyl radicals and various active species generated by the LPP reaction.

引用

页码：256 / 260

页数：5