Extraction kinetics of strontium with SDS and Twain in celestine

• Published in: Acta geochimica 2013-09, Vol.32 (3), p.269-272
• Main Authors: Liu, Chenglun, Su, Zhimin, Xu, Longjun, Zhang, Li, Xie, Taiping, Wang, Yuan
• Format: Article
• Language: English
• Subjects: Earth and Environmental Science; Earth Sciences; Emulsion polymerization; Extraction processes; Geochemistry; Kinetics; SDS; Strontium; 乳化方法; 吐温40; 天青石; 提取; 萃取动力学; 表面含氧官能团; 锶
• ISSN: 1000-9426; 2096-0956; 1993-0364; 2365-7499
• DOI: 10.1007/s11631-013-0632-4

Strontium in celestine was activated in Twain-40 with the wetting and emulsifying methods. And stron- tium extract ratio increased providing that the negative effects of oxygen containing functional groups were elimi- nated on celestine surface. In the paper, the factors affecting the extraction of strontium in celestine were investigated with orthogonal experiments. The optimal conditions were described as follows： mass ratio of celestine to extracting aid=2.6：1, the solid-liquid ratio of extracting aid solvent composed was m（SDS）： m（Twain 40）： m（HC1）=6：1：2, when celestine was ground as small as less than 0.075mm in size, and extracted for 6 hours at 333K. The strontium extract ratio increased by 61.33% and reached 97.21%, while the ratio from the comparative experiment （without extracting aid agent） was only 35.88%. Extraction kinetics of strontium in celestine showed that the diffusion process was a controlling step, and the apparent active energy was about 14.1 kJ/mol. The research results were helpful to fully utilize strontium of celestine.