Selective removal of As from arsenic-bearing dust rich in Pb and Sb

作     者：Xue-yi GUO Lei ZHANG Qing-hua TIAN Da-wei YU Jing SHI Yu YI 郭学益;张磊;田庆华;于大伟;石靖;易宇

作者机构：School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083China Cleaner Metallurgical Engineering Research CenterChina Nonferrous Metals Industry AssociationChangsha 410083China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2019年第29卷第10期

页      面：2213-2221页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 

基　　金：Project(51604303) supported by the National Natural Science Foundation of China Project(2019JJ20031) supported by the Hunan Natural Science Fund for Distinguished Young Scholar,China 

主　　题：arsenic removal sulfur arsenic-bearing dust alkaline leaching lead antimony 

摘      要：The selective removal of arsenic from arsenic-bearing dust containing Pb and Sb in alkaline solution was studied. The influence of Na OH concentration, temperature, leaching time, liquid to solid ratio, and the presence of elemental sulfur on the dissolution of As, Sb and Pb in Na OH solution was investigated. The results indicate that the presence of elemental sulfur can effectively prevent leaching of lead and antimony from arsenic. The Sb2O3, As2O3 and Pb5(AsO4)3 OH in the raw material convert to NaSb(OH)6 and PbS in the leaching residue, while arsenic is leached out as As(Ⅲ) or As(Ⅴ) ions in the leaching solution. Arsenic leaching efficiency of 99.84% can be achieved under the optimized conditions, while 97.82% of Sb and 99.97% of Pb remain in the leach residue with the arsenic concentration of less than 0.1%. A novel route is presented for the selective removal of arsenic and potential recycle of lead and antimony from the arsenic-bearing dust leached by Na OH solutions with the addition of elemental sulfur.