从生物氧化提金废液中制备砷酸铜

›› 2010, Vol. 10 ›› Issue (6): 1148-1152.

从生物氧化提金废液中制备砷酸铜

李倩田彦文落桑催成

东北大学材料与冶金学院东北大学材料与冶金学院东北大学材料与冶金学院

收稿日期:2010-10-12 修回日期:2010-11-10 出版日期:2010-12-20 发布日期:2010-12-20
通讯作者: 田彦文

Preparation of Copper Arsenate from Bio-oxidation Wastewater of Gold Extraction

LI Qian TIAN Yan-wen LUO SANG Cui-cheng

School of Materials ＆ Metallurgy, Northeastern University School of Materials and Metallurgy , Northeastern University School of Materials and Metallurgy , Northeastern University

Received:2010-10-12 Revised:2010-11-10 Online:2010-12-20 Published:2010-12-20
Contact: TIAN Yan-wen

摘要/Abstract

摘要： 在前期实验的基础上，针对生物氧化提金废液砷铁分离后的砷浸出液，探讨了以砷酸铜形式回收砷的热力学和工艺参数，绘制了Cu-As-H2O系的电位-pH图，对砷酸铜制备过程进行了热力学分析，考察了pH值、温度、搅拌速度对砷回收率的影响，得到制备砷酸铜的最佳工艺条件为pH=4.0、温度50℃、搅拌速度500 r/min. 在该工艺条件下，制得了结构式为Cu5H2(AsO4)4的砷酸铜，砷回收率达95.10%以上.

关键词: 生物氧化废液, 砷酸铜, 电位-pH图

Abstract: Based on former experimental research, the thermodynamics and process parameters for production of copper arsenate from leaching solution after separating arsenic and iron from bio-oxidation wastewater were investigated. The thermodynamics of copper arsenate preparation was analyzed by depicting the potential-pH diagram of Cu-As-H2O system. The effects of pH value, reaction temperature and stirring speed on the recovery rate of arsenic were investigated. The results showed that the optimum conditions were pH value of 4.0, temperature of 50℃ and stirring speed of 500 r/min. Under these conditions, the structural formula of copper arsenate was Cu5H2(AsO4)4 and the arsenic recovery rate over 95.10%.

Key words: bio-oxidation wastewater, copper arsenate, potential-pH diagram

李倩田彦文落桑催成. 从生物氧化提金废液中制备砷酸铜[J]. , 2010, 10(6): 1148-1152.

LI Qian TIAN Yan-wen LUO SANG Cui-cheng. Preparation of Copper Arsenate from Bio-oxidation Wastewater of Gold Extraction[J]. , 2010, 10(6): 1148-1152.