Kosaka K, Yamada H, Tsuno H, Shimizu Y, Matsui S
Graduate School of Global Environmental Studies, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto, 6068501, Japan.
Water Sci Technol. 2004;49(4):57-62.
The effects of the dissolved organic matter (DOM) on the ozone decay and the di-n-butyl phthalate (DBP) decomposition during ozone/hydrogen peroxide (O3/H2O2) process were investigated (DBP-d4 was used instead of DBP). Four surface waters, two secondary municipal sewage effluents (SMSEfs) and Suwannee river natural organic matter were used as DOM. The ozone decompositions in the DOM solutions were separated by instantaneous ozone consumption and slower ozone decay. The effect of H2O2 addition on the ozone decay was clearly observed at slower ozone decay. Ozone decomposition rate at slower ozone decay increased linearly with H2O2 dose. DBP-d4 was exponentially decreased with ozone consumption. Ozone consumption required to decompose 90% of DBP-d4 ((deltaO3)90%) in SMSEFs was higher than those in surface waters. The (deltaO3)90% per DOC of DOM values were from 22 to 23 micromole/mgC for SMSEFs and from 10 to 17 micromole/mgC for surface waters. The (deltaO3)90% values were correlated to specific ultraviolet absorbance at 254 nm (SUVA254) for surface waters.
研究了溶解有机物（DOM）对臭氧/过氧化氢（O₃/H₂O₂）过程中臭氧衰减和邻苯二甲酸二丁酯（DBP）分解的影响（使用DBP-d₄代替DBP）。采用四种地表水、两种城市二级污水（SMSEfs）和苏万尼河天然有机物作为DOM。DOM溶液中的臭氧分解通过瞬时臭氧消耗和较慢的臭氧衰减来区分。在较慢的臭氧衰减过程中，明显观察到添加H₂O₂对臭氧衰减的影响。较慢臭氧衰减时的臭氧分解速率随H₂O₂剂量呈线性增加。DBP-d₄随臭氧消耗呈指数下降。在SMSEFs中分解90%的DBP-d₄（（ΔO₃）90%）所需的臭氧消耗量高于地表水。对于SMSEFs，每单位DOM的DOC的（ΔO₃）90%值为22至23微摩尔/毫克碳，对于地表水为10至17微摩尔/毫克碳。地表水的（ΔO₃）90%值与254 nm处的特定紫外吸光度（SUVA254）相关。
