工程科学学报2016，Vol.38Issue(10)：1359-1368,10.DOI:10.13374/j.issn2095-9389.2016.10.003
十二烷基磺酸钠在赤铁矿表面吸附动力学
Adsorption kinetics of sodium dodecyl sulfonate onto hematite
摘要
Abstract
The adsorption kinetics and conformation change of sodium dodecyl sulfonate ( SDS) onto Fe2 O3-coated crystal sensors were studied by quartz crystal microbalances with dissipation ( QCM-D) . The results show that the adsorption of SDS onto Fe2 O3 sur-faces is a rapid adsorption process. The pH value has a great influence on the adsorption of SDS. When the pH value increases, the viscoelasticity of the adsorption layer improves, the stability of the adsorption layer deteriorates, and thus the recovery of hematite flota-tion gradually decreases. There is only one adsorption stage which is best fitted by the pseudo-first order model without any change in conformation in the pH range of 3 to 9. At the pH values of 10 and 11, the adsorption of SDS markedly increases and the recovery of hematite flotation also recovers. There are two distinguishable adsorption stages with the first adsorption stage best-fitted by the pseudo-second order model and the second adsorption stage by the Elovich equation. The adsorption layer also experiences an obvious confor-mation change as the adsorption continues.关键词
赤铁矿/浮选/十二烷基磺酸钠/吸附动力学/石英晶体微天平Key words
hematite/flotation/sodium dodecyl sulfonate/adsorption kinetics/quartz crystal microbalances分类
矿业与冶金引用本文复制引用
寇珏,杨葆华,徐世红,孙体昌..十二烷基磺酸钠在赤铁矿表面吸附动力学[J].工程科学学报,2016,38(10):1359-1368,10.基金项目
国家自然科学基金青年科学基金资助项目(51204012) （51204012）
