LIU Chenglun1*, SU Zhimin1, XU Longjun2, ZHANG Li1, XIE Taiping2, and WANG Yuan1
1 College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
2 State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
Abstract Strontium in celestine was activated in Twain-40 with the wetting and emulsifying methods. And strontium extract ratio increased providing that the negative effects of oxygen containing functional groups were eliminated 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(HCl)=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.
* Corresponding author E-mail: xlclj@cqu.edu.cn
CHINESE JOURNAL OF GEOCHEMISTRY Vol. 32, No. 2, 2013, page 269-272
© Science Press and Institute of Geochemistry, CAS and Springer-Verlag Berlin Heidelberg 2013
