Acta Chimica Sinica ›› 1995, Vol. 53 ›› Issue (7): 683-688. Previous Articles     Next Articles

Original Articles

表面活性剂对HDEHP萃取动力学的影响

孙思修;郝京诚;沈静兰   

  1. 山东大学化学系
  • 出版日期:1995-07-15 发布日期:1995-07-15

Effects of the surfactants on the extraction kinetics with HDEHP

SUN SIXIU;HAO JINGCHENG;SHEN JINGLAN   

  • Online:1995-07-15 Published:1995-07-15

The extraction rate of Co^2^+ with di(2-ethylhexyl) phosphoric acid (HDEHP) was determined by the means of single drop method. The effects of the surfactants, trioctyl phosphine oxide (TOPO), sodium dodecyl sulfonate (SDS) and hexadecyl trimethyl ammonium bromide (CTMAB), on the extraction rate of Co^2^+ were investigated. The acceleration in the kinetics in contributed to the associated molecule (HDEHP)~2 TOPO taking part in the extraction process directly. The decrement effects of SDS or CTMAB on the rate of extraction kinetics of Co^2^+ with HDEHP were also observed, which caused by the adsorption of molecules of SDS or CTMAB on the interface and decreased the interfacial adsorption amount of HDEHP. In addition, the extraction rate was reduced by a bigger margin in HDEHP-SDS system. This can be explained in terms of the formation of an electric field at the interface.

Key words: DYNAMICS, COBALT, SURFACTANTS, EXTRACTION

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