%0 Journal Article
%T Ozonation of Representative Endocrine Disruptors (EDs) in Water<br>水中典型内分泌干扰物质的臭氧氧化研究
%A LIU Gui-fang
%A MA Jun
%A QIN Qing-dong
%A LI Xu-chun
%A LI Gui bai
%A <br>刘桂芳
%A 马军
%A 秦庆东
%A 李旭春
%A 李圭白
%J 环境科学
%D 2007
%I 
%X The effects of ozone dose, bicarbonate concentration and pH on endocrine disruptors(EDs) removal, such as E1, E2, EE2, DES and 4-n-NP, were investigated through batch experiment. The results indicated that the removal rates were enhanced by increasing ozone dose, and O3 exposures of only 63.6 microg/L were calculated to achieve > or = 92.0% EDs removal efficiency. The presence of bicarbonate (0 - 100 mg/L) inhibited EDs ozonation. Furthermore, the EDs removal rates increased significantly as pH increased. The five apparent rate constants (20 degrees C +/- 0.5 degrees C) of ozone with the five EDs were in the range of (1.67 - 3.89) x 10(6)L (mol s) (-1) at neutral pH (pH approximately 7.0) and (0.93 approximately 1.75) x 10(9) L (mol s)(-1) at basic pH (pH > 10.6). It was indicated that the five EDs were removed rapidly by O3 in water. At the same time, the elementary reaction ozone rate constants (20 degrees C +/- 0.5 degrees C) were calculated, and the reactivity of ozone with ionized EDs i.e. 1.21 x 10(9) - 3.81 x 10(9) L (mol s)(-1)] was 10(3) - 10(4) times higher than with neutral EDs i.e. 7.62 x 10(5) - 2.55 x 10(6) L (mol s)(-1)]. The comparative test of EDs ozonation under different water quality conditions indicated that the removal rates of EDs in filtrated water and river water were reduced 26.5% - 50.3% and 57.3% - 72.0% respectively compared with the case using ultrapurified water as the background. It showed that organics in real water would compete with EDs for ozonation.
%K endocrine disruptors
%K ozone
%K reactive kinetics
%K rate constant
%K oxidation<br>内分泌干扰物
%K 臭氧
%K 反应动力学
%K 速率常数
%K 氧化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=BC85E858628321E14A665EC8C74B758B&yid=A732AF04DDA03BB3&vid=D3E34374A0D77D7F&iid=DF92D298D3FF1E6E&sid=819029E276C005ED&eid=4BA709A0F998E415&journal_id=0250-3301&journal_name=环境科学&referenced_num=1&reference_num=18