Collivignarelli C, Sorlini S
Department of Civil Engineering, University of Brescia, via Branze 38, Brescia, 25123, Italy.
Water Sci Technol. 2004;49(4):51-6.
In this study, the advanced oxidation with ozone and UV radiation (with two low pressure UV lamps, at 254 and 185 nm wavelength) were experimented on a surface water in order to study the removal of two odorous compounds (geosmin and 2-methylisoborneol) and a pesticide (metolachlor), the influence on organic compounds (UV absorbance and THM precursors) and bromate formation. Different batch tests were performed with ozone concentration up to 10 mg/L, UV dose up to 14,000 J/m2 and a maximum contact time of 10 minutes. The main results show that metolachlor can be efficiently removed with ozone alone while for geosmin and MIB a complete removal can be obtained with the advanced oxidation of ozone (with concentration of 1.5-3 mg/L and contact time of 2-3 minutes) with UV radiation (with doses of 5,000-6,000 J/m2). As concerns the influence on the organic precursors, all the experimented processes show a medium removal of about 20-40% for UV absorbance and 15-30% for THMFP (trihalomethanes formation potential). As concerns bromate formation, the advanced oxidation of ozone/UV 254 nm shows a bromate formation that is about 40% lower with respect to conventional oxidation with ozone.
在本研究中，采用臭氧和紫外线辐射（配备两个低压紫外线灯，波长分别为254和185纳米）对地表水进行高级氧化实验，以研究两种臭味化合物（土臭素和2 - 甲基异莰醇）及一种农药（异丙甲草胺）的去除情况、对有机化合物（紫外线吸光度和三卤甲烷前驱物）的影响以及溴酸盐的生成。进行了不同的批次试验，臭氧浓度最高达10毫克/升，紫外线剂量最高达14,000焦/平方米，最大接触时间为10分钟。主要结果表明，仅用臭氧就能有效去除异丙甲草胺，而对于土臭素和2 - 甲基异莰醇，在臭氧（浓度为1.5 - 3毫克/升，接触时间为2 - 3分钟）与紫外线辐射（剂量为5,000 - 6,000焦/平方米）的高级氧化作用下可实现完全去除。关于对有机前驱物的影响，所有实验过程对紫外线吸光度的去除率约为20 - 40%，对三卤甲烷生成势（THMFP）的去除率为15 - 30%。关于溴酸盐的生成，臭氧/紫外线254纳米的高级氧化作用下生成的溴酸盐比传统臭氧氧化作用下生成的溴酸盐低约40%。
