中南大学学报（自然科学版）2018，Vol.49Issue(6)：1315-1324,10.DOI:10.11817/j.issn.1672-7207.2018.06.002
黄铜矿吸附5-戊基-1,2,4-三唑-3-硫酮的热力学及机理
Thermodynamics and mechanism of 5-pentyl-1,2,4-triazole-3-thione adsorption on chalcopyrite surfaces
摘要
Abstract
During refluxing, the intermediate, hexanamide thiourea was prepared by using hexanoic acid and thiosemicarbazide as raw materials. And then the intermediate was cyclized in alkaline solutions, and subsequently acidized to obtain 5-pentyl-1,2,4-triazole-3-thione (PETT). The structure of PETT was characterized by FTIR,1HNMR and13CNMR spectra. The flotation performance, adsorption thermodynamics and mechanism of PETT on to chalcopyrite were investigated. The results show that PETT is an excellent collector for chalcopyrite flotation and it prefers to adsorb on to chalcopyrite surfaces at pH 4.0-9.0, and its adsorption amount increases with the increase of temperature. PETT adsorption on to chalcopyrite surfaces is in line with Langmuir mode and the thermodynamic parametersΔH,ΔS andΔG(298 K) are 54.27 kJ/mol, 278.82 J/(mol·K) and-28.81 kJ/mol, respectively. This demonstrates that PETT adsorption is a spontaneous, endothermic and monolayer chemisorption. PETT chemisorbs on to chalcopyrite surfaces through bonding of its nitrogen atoms in the triazole ring and the exocyclic sulfur atom with the surface copper atoms.关键词
5-戊基-1,2,4-三唑-3-硫酮/黄铜矿/热力学/吸附/XPSKey words
5-pentyl-1/2/4-triazole-3-thione/chalcopyrite/thermodynamics/adsorption/XPS分类
化学化工引用本文复制引用
牛晓雪,刘广义,胡哲,麻龙群,黄耀国,肖静晶,刘胜..黄铜矿吸附5-戊基-1,2,4-三唑-3-硫酮的热力学及机理[J].中南大学学报（自然科学版）,2018,49(6):1315-1324,10.基金项目
国家自然科学基金资助项目(51474253) （51474253）
国家重点基础研究发展规划(973计划)项目(2014CB643403) （973计划）
国家高技术研究发展计划(863计划)项目(2013AA064101) (Project(51474253) supported by the National Natural Science Foundation of China （863计划）
Project(2014CB643403) supported by the National Basic Research Development Program (973 Program) of China （2014CB643403）
Project(2013AA064101) supported by the National High Technology Research and Development Program (863 Program) of China) （2013AA064101）
