NaClO氧化水中As(Ⅲ)的实验研究

Experiment on Oxidation of Arsenic(Ⅲ) by NaClO in Water

利用氧化剂将水中的As（Ⅲ）氧化成As（Ⅴ）,既可提高去除效果,又可降低毒性。文章以NaClO作为氧化剂进行了氧化As（Ⅲ）的相关实验,实验结果表明：pH在4~11的范围内对NaClO氧化As（Ⅲ）的影响不大,As（Ⅲ）的氧化率随着NaClO的投加量和氧化反应时间的增加而增大,其氧化过程更符合一级动力学过程。结论：NaClO氧化As（Ⅲ）迅速,氧化率基本可达到100%,氧化效果明显。

Oxidation of arsenic（Ⅲ） to arsenic（V） by oxidant could not only increase the effect of As（Ⅲ） removal but also reduce its toxicity.Correlative experiment for oxidation of As（Ⅲ） by NaClO was done.Results of experiment indicated that effect of pH within the range of 4~11 on the oxidation of As（Ⅲ） was little by NaClO.Oxidation rate enhanced with the increase of dosing quantity and oxidation reaction time,with the oxidation process more suitable for the first order kinetic process.Oxidation of As（Ⅲ） by NaClO was rapid and obvious,with its oxidation rate basically up to 100%.