Ultrasonic-enhanced selective sulfide precipitation of copper ions from copper smelting dust using monoclinic pyrrhotite  

超声强化单斜磁黄铁矿从铜烟灰中选择性硫化沉淀铜离子

作　　者：Xing-fei ZHANG Jia YUAN Jia TIAN Hai-sheng HAN Wei SUN Tong YUE Yue YANG Li WANG Xue-feng CAO Cheng-long LU 张荥斐;袁佳;田佳;韩海生;孙伟;岳彤;杨越;王丽;曹学锋;卢承龙(中南大学资源加工与生物工程学院,长沙410083;中南大学战略含钙矿物资源清洁高效利用湖南省重点实验室,长沙410083)

机构地区：[1]School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China [2]Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources,Central South University,Changsha 410083,China

出　　处：《Transactions of Nonferrous Metals Society of China》2022年第2期682-695,共14页中国有色金属学报（英文版）

基　　金：the National Key Scientific Research Project,China(Nos.2018YFC1901601,2018YFC1901602);the Fundamental Research Funds for the Central Universities of Central South University,China(No.2021zzts0307);the National Natural Science Foundation of China(No.51804340);the Innovation-driven Plan of Central South University,China(No.2018CX036);the Collaborative Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources,China,and Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources,China(No.2018TP1002).

摘　　要：The sulfide passivation film produced on the surface seriously prevents further reaction in the process of using monoclinic pyrrhotite(MPr)to treat heavy metal ions in wastewater.Ultrasonic technology was introduced to assist MPr to recover the copper ions.XPS result proves that CuS products exist on the surface of MPr.XRD and SEM results show that the CuS on the particles’surface is stripped under ultrasonic condition.The kinetics results indicate that the reaction under both conventional and ultrasonic conditions conform to the Avrami model.The reaction process changes from diffusion control to chemical reaction control under the ultrasonic condition as the solid layer is stripped off.The presence of ultrasonic significantly reduces the acidity and temperature required for the reaction and enhances the utilization efficiency of MPr;by controlling the amount of MPr,the removal rates of copper and arsenic in copper smelting dust leachate exceed 99%and 95%,respectively.在单斜磁黄铁矿(MPr)处理废水重金属离子过程中表面产生的硫化物钝化膜严重阻碍进一步反应。采用超声波技术辅助MPr回收铜离子。XPS分析结果表明,反应过程中MPr表面存在CuS产物。XRD和SEM分析结果表明,在超声条件下颗粒表面的CuS被剥离。动力学结果表明,常规和超声条件下的反应均符合Avrami模型。在超声条件下,随着固体层的剥离,反应过程由扩散控制转变为化学反应控制。超声波的存在显著降低反应所需的酸度和温度,提高MPr的利用效率;通过控制MPr的用量,铜烟灰浸出液中铜和砷的去除率分别达到99%和95%以上。

关 键 词：ultrasonic-assisted treatment monoclinic pyrrhotite copper smelting dust arsenic removal selective sulfide precipitation 

分 类 号：X703[环境科学与工程—环境工程]