过氧化氢
化学
草酸
臭氧
羟基自由基
分解
流出物
废水
水溶液
总有机碳
环境化学
有机质
无机化学
激进的
有机化学
环境工程
环境科学
作者
Koji Kosaka,Harumi Yamada,Kenichi Shishida,Shinya Echigo,Roger A. Minear,Hiroshi Tsuno,Saburo Matsui
出处
期刊:Water Research
[Elsevier]
日期:2001-10-01
卷期号:35 (15): 3587-3594
被引量:82
标识
DOI:10.1016/s0043-1354(01)00087-2
摘要
The performance of a multistage ozone/hydrogen peroxide (O3/H2O2) process was evaluated with respect to total organic carbon (TOC) removal of waste waters. An aqueous humic acid solution (5.2 mgC l(-1) as TOC) and a sand filtered secondary sewerage effluent (5.6mgC l(-1) as TOC) were used as model waste waters. Appropriate range of hydrogen peroxide (H2O2) dose at each stage depended upon the components of the tested solutions that changed as the process proceeded. Higher hydrogen peroxide dose was required at later stages in which low reactivity compounds with hydroxyl radical (HO*), low molecular fatty acids, were predominant. And, oxalic acid concentration related to H2O2 demand at later stages. This was assumed that the slow decomposition of oxalic acid was rate-determining step for TOC removal after its accumulation. Also, it is important to maintain dissolved ozone at low concentration for efficient TOC removal because rapid ozone consumption is required for the rapid formation of hydroxyl radical (HO*).
科研通智能强力驱动
Strongly Powered by AbleSci AI