中文摘要：

研究了碱性体系下以高锰酸钾为催化剂空气氧化As（Ⅲ）的方法，考察了溶液pH值、总砷浓度、空气流量、反应温度和反应时间等因素对As（Ⅲ）氧化效果的影响，采用X射线衍射、扫描电镜、化学物相分析等方法对反应产物进行了表征。结果表明，高锰酸钾具备超计量氧化的特点，在As／Mn摩尔比升至21：1时仍能高效地将As（Ⅲ）氧化；溶液pH值通过影响产物性质而对氧化效果有显著的影响；溶液总砷浓度升高，氧化速率变慢；增加空气流量或者升高温度会显著加快As（Ⅲ）的氧化速率。

英文摘要：

A method of aerial oxidation of As （Ⅲ） in alkaline system was investigated using potassium permanganate as catalyst. The influence of several variables such as solution pH value, total arsenic concentration, air flow, reaction temperature and reaction time on As （Ⅲ） oxidation efficiency was determined. The properties of reactive products were characterized by X-ray diffraction（XRD）, scanning electron microscope （SEM） and chemical phase analysis. Results show that the potassium permanganate has characteristics of supper-metering oxidizing arsenic. The As （Ⅲ） could be effectively oxidized when As/Mn mole ratio reaches 21： 1. The solution pH value would influence the oxidation results significantly by altering products properties. The oxidation rate of As（Ⅲ） would decrease with the increase of the total arsenic concentration in the solutions. However, the oxidation rate of As（Ⅲ） could increase remarkably with the increase of air flow or system temperature.