水中As(Ⅲ)的氧化动力学研究  

Kinetic Study of the Oxidation of Arsenic(Ⅲ)in Water

作　　者：熊鹏[1] 李义连[1] 

机构地区：[1]中国地质大学(武汉)环境学院,湖北武汉430074

出　　处：《环境科学与技术》2012年第4期1-3,98,共4页Environmental Science & Technology

基　　金：国家863项目(2007AA06Z333)

摘　　要：文章以空气作为氧化剂进行了氧化A(sⅢ)的相关实验,探讨水中A(sⅢ)的氧化动力学过程。实验结果表明:pH对曝气氧化水中A(sⅢ)的影响不明显;室温条件下避光曝气8 h时A(sⅢ)的氧化率为9.24%,阳光下曝气8 h时,氧化率达到17.92%,阳光下曝气氧化水中As(Ⅲ)的效果明显比避光曝气时的好,氧化过程均符合一级动力学过程。结论:曝气能对水中的A(sⅢ)起到一定的氧化作用,光照对于水中的A(sⅢ)的氧化起到了重要的作用。This article carded on the correlative experiment for oxidation of arsenic （III ）by air to discuss the oxidation kinetic process of As （ Ⅲ ） in water. The result of experiment indicated that influence of pH on the oxidation of As （ Ⅲ ）in water through aeration was not obvious. The rate of oxidation of As （ Ⅲ） was 9.24% when aeration at room temperature in darkness for 8 hours. The rate of oxidation of As （Ⅲ） reached 17.92% when aeration in the sun for 8 hours. The effect of the oxidation of As（ Ⅲ） in water through aeration in the sun was better than in darkness and both oxidation process were suitable for the first order kinetic course. Aeration had some effect on the oxidation of As （Ⅲ ） in water, and sunlight had important effect on the oxidation of As（ Ⅲ ）in water.

关 键 词：As(Ⅲ)氧化 动力学 曝气 

分 类 号：X169[环境科学与工程—环境科学]