Conversion of lead chloride into lead carbonate in ammonium bicarbonate solution
作者: Yongming ChenLonggang YeHaotian XueShenghai Yang
作者单位: 1School of Metallurgy and Environment, Central South University, Changsha 410083, China
2School of Metallurgy and Materials Engineering, Hunan University of Technology, ZhuZhou 412007, China
3Qinghai Provincial Research and Design Academy of Environmental Science, Xining 810000, China
刊名: Hydrometallurgy, 2017, Vol.173 , pp.43-49
来源数据库: Elsevier Journal
DOI: 10.1016/j.hydromet.2017.04.014
关键词: Lead chlorideLead carbonateAmmonium bicarbonateDechlorination kineticsPhase transformation
英文摘要: Abstract(#br)This study aimed to characterize the kinetics and mechanism of the phase transformation from lead chloride to lead carbonate in ammonium bicarbonate solution. The dechlorination rate of PbCl 2 was consistently high: it increased with increasing concentrations of NH 4 HCO 3 and decreased only moderately with the increasing total concentration of Cl − in the solution. The rate also increased systematically with increasing temperatures, and the apparent activation energy was 14.363kJ/mol. The reaction obeyed the shrinking-core model, which involved diffusion through the thickening product layer formed on the PbCl 2 particles. The pH of the leaching solution strongly influenced the conversion results. A reduction in the pH led to a decrease in the...
全文获取路径: Elsevier  (合作)
影响因子:2.169 (2012)

  • chloride 氯化物
  • Conversion 变换
  • bicarbonate 重碳酸盐
  • ammonium 
  • solution 溶液
  • kinetics 动力学
  • transformation 变换