[Effects of organic pollutants in drinking water on the removal of dimethyl phthalate by advanced oxidation processes].
Humic acids were used to simulate natural organic compounds in water for the investigation of DMP oxidation by three different AOPs (advanced oxidation processes) of UV-H2O2, O3 and UV-O3. The results showed that pseudo-first-order reaction equation could describe the oxidation of DMP by UV-H2O2 perfectly, which was strongly affected humic acids in water. The relationship between pseudo-first-order reaction rate and TOC value could be expressed as K = 0. 162 0 [TOC]-0.8171. It was also found that humic acids in the water exhibited obvious influence on the oxidation of DMP by UV-O3. However, effect of humic acids on the oxidation of DMP by ozone was not obvious. It was also analyzed that oxidation of DMP was dominated by ozone oxidation both in ozonation process and UV-O3 process; the importance of "OH in the oxidation of DMP was enhanced as the concentration of DMP decreased in UV-O3 process. The degree of impact form humic acids towards different AOPs could be ranked in a decreasing order as UV-H2O3, UV-O3, 03.
Rui
Min
M
State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China. cnrw@163.com
Gao
Nai-yun
NY
Xu
Bin
B
Li
Fu-sheng
FS
Zhao
Jian-fu
JF
Le
Lin-sheng
LS
D052244:Endocrine Disruptors / Q000737:chemistry* / Q000302:isolation & purification; D006812:Humic Substances / Q000032:analysis*; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry; D010795:Phthalic Acids / Q000737:chemistry* / Q000302:isolation & purification; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods*; D014881:Water Supply / Q000032:analysis
D052244:Endocrine Disruptors; D006812:Humic Substances; D010795:Phthalic Acids; D014874:Water Pollutants, Chemical; C024629:dimethyl phthalate; D010126:Ozone