摘要
为实现钨冶炼渣的资源化利用,通过正交试验和静态吸附试验,研究了钨渣-膨润土颗粒吸附剂制备的最佳成分比例和工艺条件。结果表明,颗粒吸附剂制备的最佳条件为:钨渣与膨润土的质量比为5:1,颗粒粒径为2 mm,烧结工艺为800℃,2 h。使用X射线衍射仪和扫描电镜验证吸附剂主要形态为颗粒状的铁锰氧化物,其表面有大量的孔洞。在溶液pH为6,吸附剂用量为15 g/L,铅初始浓度为300 mg/L,吸附时间为200 min的条件下,吸附剂对废水中Pb2+的去除率达99.95%。该吸附剂对Pb2+的吸附过程符合准二级动力学方程,吸附等温线符合Langmuir方程,对Pb2+的吸附属于单分子层的特异性化学吸附。
In this study,the preparation of tungsten slag-bentonite particle adsorbent was studied using orthogonal and static adsorption tests.The adsorbent was characterized,and its adsorption performance for heavy metal lead ions was clarified.The results indicate that the optimum conditions are as follows:mass ratio of tungsten slag to bentonite of 5:1,particle size of 2 mm,and sintering at 800℃for 2 h.The adsorbent primarily consisted of granular Fe-Mn oxides with a large number of holes on its surface.When the pH value of the solution is 6,adsorbent dosage is 15 g/L,initial lead concentration is 300 mg/L and adsorption time is 200 min,the removal rate of lead in wastewater by adsorbent reaches 99.95%.The adsorption process conforms to the pseudo-second-order kinetic equation,and its adsorption isotherm conforms to the langmuir equation.The adsorption of lead belongs to the specific chemical adsorption of single molecular layer.
作者
魏渤函
薛志远
杨裕东
钟晓聪
任如山
王瑞祥
张魁芳
WEI Bo-han;XUE Zhi-yuan;YANG Yu-dong;ZHONG Xiao-cong;REN Ru-shan;WANG Rui-xiang;ZHANG Kui-fang(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,China;Institute of Resources Utilization and Rare Earth Development,Guangdong Academy of Sciences,Guangzhou 510650,China;State Key Laboratory of Separation and Comprehensive Utilization of Rare Metals,Guangzhou 510650,China;Guangdong Province Key Laboratory of Rare Earth Development and Application,Guangzhou 510650,China)
基金
Project (2021A1515012268) supported by the Guangdong Basic and Applied Basic Research Foundation,China
Project (52074094) supported by the National Natural Science Foundation of China
Project supported by the Distinguished Professor Program of Jinggang Scholars in Institutions of Higher Learning
Jiangxi Province,China
Project (GJJ180437) supported by the Science and Technology Program of Education Department
Project (2021A0104001) supported by the Science and Technology Planning Project of Meizhou,China
Projects (2022GDASZH-2022010104,2023GDASZH-2023010104) supported by the Guangdong Academy of Sciences Project of Science and Technology Development,China。
关键词
钨冶炼渣
资源化利用
吸附
含铅废水
tungsten slag-bentonite particle adsorbent
preparation
characterization
adsorption
lead wastewater
作者简介
Corresponding author:WANG Rui-xiang,PhD,Professor,E-mail:wrx9022@163.com,ORCID:https://orcid.org/0009-0002-0791-334X;Corresponding author:ZHANG Kui-fang,PhD,Associate Professor,E-mail:zhang_kui_fang@163.com,ORCID:https://orcid.org/0009-0009-5527-7799。
