H_2O_2/O_3高级氧化工艺控制黄河水中溴酸盐生成  

Influence of H_2O_2/O_3 AOPs on suppressing bromate formation potential in Yellow River water treatment

作　　者：杨宏伟[1] 孙利利[1] 吕淼[1] 杨少霞[2] 刘文君[1] 

机构地区：[1]清华大学环境学院,环境工程系,北京100084 [2]华北电力大学可再生能源学院,北京102206

出　　处：《清华大学学报（自然科学版）》2012年第2期211-215,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家水体污染控制与治理科技重大专项资助(2008ZX07422-004)

摘　　要：为了解决高溴黄河水臭氧化过程中溴酸盐(BrO-3)生成问题,在连续实验装置中,采用H2O2/O3高级氧化技术(AOPs)技术,研究臭氧(O3)、过氧化氢(H2O2)质量浓度以及水力停留时间(HRT)对黄河水BrO3-生成控制的影响。研究结果表明:H2O2的投加能够有效促进O3消耗;当O3质量浓度为2.9～4.3mg/L时,单独臭氧化过程中,BrO-3生成量为13～50μg/L,均超标,投加H2O2能够有效抑制BrO3-的产生,其抑制效果与H2O2/O3的摩尔比有关,当H2O2/O3摩尔比为1.5时,控制效果最佳,当O3质量浓度低于3.72mg/L时,在此比例时可将BrO-3浓度控制在10μg/L以下,达到现行的饮用水标准;BrO3-生成量与HRT成正比;当O3质量浓度较高时,可通过适当减少HRT控制出水BrO-3浓度。H2O2/O3高级氧化工艺对有机物的去除具有强化作用,出水UV254去除率可达50%以上。Bromate（BrO3） will form during ozonation of bromide containing water.This study analyzes the factors controlling the H2O2/O3 advanced oxidation process（AOP） which affects the BrO3 formation characteristics of bromide containing water,such as the O3 dosage,H2O2 dosage and hydraulic retention time（HRT）.The addition of H2O2 accelerates O3 decomposition with bench scale experiments showing that 13~50 μg/L BrO3 were formed with ozone doses of 2.88~4.30 mg/L.H2O2/O3 AOP effectively controls BrO3 formation based on the molar ratio of H2O2/O3 with a H2O2/O3 ratio 1.5 giving the minimum BrO3 concentration.In that condition,the BrO3 formation amount can be restricted to below 10 μg/L to satisfy existing drinking water standards with ozone doses below 3.72 mg/L.BrO3 formation has a positive correlation with the hydraulic retention hour.H2O2/O3 AOP reinforces the effect of normal organic matter（NOM） removal with more than 50% of UV254 removed in H2O2/O3 AOPs.

关 键 词：臭氧(O3) 过氧化氢(H2O2) H2O2/O3高级氧化工艺 溴酸盐 有机物 

分 类 号：TU991.2[建筑科学—市政工程]