High-efficiency extraction of aluminum from low-grade kaolin via a novel low-temperature activation method for the preparation of poly-aluminum-ferric-sulfate coagulant
作者: Junwu ChenXudong LiWeiquan CaiYingxian ShiXiang HuiZhijun CaiWei JinJiajie Fan
作者单位: 1School of Chemistry and Chemical Engineering, Guangzhou University, 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center, Guangzhou, 510006, PR China
2School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 205 Luoshi Road, Wuhan, 430070, PR China
3Shandong Letter Quality Inspection Co., Ltd., Zibo, Shandong, 255020, PR China
4Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, PR China
5School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, PR China
刊名: Journal of Cleaner Production, 2020, Vol.257
来源数据库: Elsevier Journal
DOI: 10.1016/j.jclepro.2020.120399
关键词: Facile activation for low-grade kaolinWater leachingMechanismPoly-aluminum-ferric-sulfate coagulantDye removal
英文摘要: Abstract(#br)A facile hydrometallurgical method was proposed for high-efficiency extraction of aluminum at low activation temperature from low-grade kaolin involving sulfuric acid assisted activation followed by water leaching. After the slurry mixture of low-grade kaolin and sulfuric acid solution was stirred at 25 °C for 3 h and further heated at 150 °C for 2 h, the optimal extraction efficiencies of Al (98.8%) and Fe (98.1%) were achieved via water leaching at room temperature. The activation mechanism was proposed via investigating the intermediates during the activation process. It was found that the low activation temperature and the high extraction efficiencies result from the intercalation of sulfuric acid. The poly-aluminum-ferric-sulfate (PAFS) coagulant was further obtained...
全文获取路径: Elsevier  (合作)
影响因子:3.398 (2012)

  • aluminum 
  • coagulant 凝结剂
  • kaolin 高岭土
  • efficiency 效率
  • sulfate 硫酸盐
  • ferric 正铁的
  • extraction 提取
  • temperature 温度
  • grade 品位
  • activation 活化