期刊
CHEMICAL ENGINEERING & TECHNOLOGY
卷 45, 期 6, 页码 1201-1206出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ceat.202100584
关键词
Arsenic; As(III)-to-As(V) oxidation; Copper smelter wastewater; Ozone
This study investigates the oxidation of As(III) to As(V) in copper smelter wastewater using in situ-generated ozone. The optimal conditions for efficient oxidation were determined as pH 2 and moderate oxygen flow rate. The complete oxidation of As(III) was achieved in both synthetic and real wastewater.
As(III) is the most common arsenic species in copper smelter wastewater but is difficult to remove, and an oxidation to As(V) is desirable. The oxidation of As(III) to As(V) in copper smelter wastewater was studied using in situ-generated ozone, which has a high oxidation capacity and does not create secondary contaminants. With the aim to determine adequate conditions for As(III) oxidation, experiments considering pH, ozonation time, and oxygen flow rate as variables were done. Experimental tests showed that the best pH was at 2 and with a moderate oxygen flow rate. The complete oxidation of As(III) in both synthetic wastewater and real wastewater was achieved nearly after the same time of ozonation. Pseudo-first-order kinetics could model the As(III)-to-As(V) oxidation by ozone.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据