化工学报2011，Vol.62Issue(10)：2926-2931,6.DOI:10.3969/j.issn.0438-1157.2011.10.035
共存物质对O3/H2O2工艺降解2,4-D的影响(Ⅱ)氯和过氧化氢动力学分析
Effect of coexisting substances on degradation of 2,4-D in O3/H2 O2 process(Ⅱ) Kinetics analysis of chlorine and hydrogen peroxide
摘要
Abstract
To simulate the complicated surroundings of water quality in actual system, the effect of different coexisting substances such as chlorine and H2O2 on 2,4-D degradation in O3/H2O2 process was investigated. Different inorganic salts and organics were added to 2,4-D solution prepared with deionized water, and tap water and surface water were also used to prepare 2,4-D solution but without other additives. By monitoring concentrations change of chlorine and H2O2 in aqueous solution, the effect of different coexisting substances on dechlorination and H2 O2 formation and decomposition was studied. The experimental results show that amount of dechlorination is normally less than that of 2, 4-D degradation. The dechlorination in degradation process is mainly induced by the reaction of hydroxyl radical, and can be inhibited by coexisting substances that restrain indirect reaction of hydroxyl radicals and enhanced by these that improve 2,4-D degradation. At the time when 2,4-D are completely degraded, dechlorination is also closely accomplished. This is favorable for decrease of toxicity in reaction solution. The effect of coexisting substances on rate constants of H2O2 decomposition is larger, and the majority ofthem can increase rate of H2O2 decomposition. On the contrary, effect of coexisting substances on rate constants of H2O2 formation is less, and the majority of them inhibit H2O2 formation.关键词
臭氧/过氧化氢/2,4-D/共存物质/脱氯Key words
ozone/ hydrogen peroxide/ 2,4-D/ coexisting substance/ dechlorination分类
资源环境引用本文复制引用
陈岚,权宇珩..共存物质对O3/H2O2工艺降解2,4-D的影响(Ⅱ)氯和过氧化氢动力学分析[J].化工学报,2011,62(10):2926-2931,6.基金项目
河北省自然科学基金项目(B2009001371). （B2009001371）
