文献类型：期刊文献

英文题名：Efficient separation and recovery of barium from barium slag via hydrometallurgical approach: Process design, thermodynamics research and mechanism investigation

作者：Wu, Yadong Xu, Junhong Lin, Shuhuan Huang, Hongsheng

第一作者：Wu, Yadong

通信作者：Wu, YD[1];Huang, HS[1]|[144406c0812405d42e8a8]黄宏升;

机构：[1]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[2]Guizhou Univ, Coll Resources & Environm Engn, Guiyang 550003, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2024

卷号：448

外文期刊名：JOURNAL OF CLEANER PRODUCTION

收录：;EI(收录号：20241115729885);Scopus(收录号：2-s2.0-85187207500);WOS:【SCI-EXPANDED(收录号:WOS:001202911900001)】；

基金：This study was supported by the Education Department of Guizhou Province (QJJ [2022] 266) ; National Science Foundation of China (21963006) ; Education Department of Guizhou Province (QJJ[2022]035) .

语种：英文

外文关键词：Barium slag; Hazardous solid waste; Hydrometallurgical technologies; Process design; Mechanism analysis

摘要：The accumulation of barium slag (Bs) not only presents significant environmental challenges but also results in the inefficient utilization of resources. The present study investigates the scientific problems of hydrometallurgical methods for converting compounds containing barium in Bs into desired barium salts, with a specific focus on acid treatment, flocculation and precipitation of soluble barium from the leaching solution, as well as heavy media separation in the Bs residue. The experimental findings demonstrate that over 98.5% of the compounds containing barium undergo successful conversion into BaCO3 and BaSO4, achieving high purities of 98.7% and 79.4%, respectively. A crucial aspect of the mechanism lies in the interaction among ions, which facilitates the conversion of compounds containing barium into the desired barium salts. Additionally, the utilization of flocculants significantly enhances the efficiency and rate of flocculation for the BaCO3 turbid fluid, wherein PAM and C-PAM exhibit superior effects in comparison to A-PAM. The reduction in the thickness of the electrical double layer, achieved through the application of flocculants, plays a pivotal role in expediting particle precipitation. Moreover, thermodynamic analysis illuminates the energy changes and the transformation processes during the recovery of barium from Bs. The study concludes by presenting a strategy for cleaner production to recover desired barium salts with Bs.