Extractive Separation of Al(III) and Ni(II) by Di-2-Ethylhexyl Phosphoric Acid -Kerosene System from Aqueous Fluoride Medium

Extractive Separation of Al(III) and Ni(II)

Authors

  • Muhammad Fakhrul Islam Department of Applied Chemistry and Chemical Technology, University of Rajshahi, Rajshahi-6205, Bangladesh
  • Dil Afroz Begum Department of Applied Chemistry and Chemical Technology, University of Rajshahi, Rajshahi-6205, Bangladesh
  • Muhammad Matiur Rahman Department of Applied Chemistry and Chemical Technology, University of Rajshahi, Rajshahi-6205, Bangladesh
  • Muhammad Saidur Rahman Department of Applied Chemistry and Chemical Technology, University of Rajshahi, Rajshahi-6205, Bangladesh

Keywords:

Al-Ni separation, D2EHPA-kerosene system, fluoride medium

Abstract

In the study of the extractive separation of Al(III) and Ni(II) by di-2-ethylhexyl phosphoric acid D2EHPA- kerosene from aqueous fluoride medium, about 94% Al(III) and 2% Ni(II) were extracted with 0.3 M D2EHPA (pH 2.1 and temperature 30±1 °C). Extraction of Ni(II) decreased with increasing extractant concentration. D2EHPA-kerosene- fluoride system showed better extraction of Al(III) with higher extractant concentration and aqueous pH and vice versa for the extraction of Ni(II). The maximum separation factor (b~1380) was obtained for Al(III) at 20 °C and decreased to (b~732) at 60 °C. The separation of Al(III) from Ni(II) was favoured at normal temperature. Extraction followed the order Al(III) >>>Ni(II). About 99% stripping of Al(III) was attained from the loaded 0.20 M D2EHPA. Much faster extraction of Al(III) compared to Ni(II) and preferential loading were shown by D2EHPA-kerosene in the presence of fluoride ion in the aqueous phase. Separation of Al(III) was the most outstanding from Ni-Al-F-complex solution.

 

 

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Published

2009-04-27

How to Cite

Islam, M. F., Begum, D. A., Rahman, M. M., & Rahman, M. S. (2009). Extractive Separation of Al(III) and Ni(II) by Di-2-Ethylhexyl Phosphoric Acid -Kerosene System from Aqueous Fluoride Medium: Extractive Separation of Al(III) and Ni(II). Biological Sciences - PJSIR, 52(2), 59–65. Retrieved from https://v2.pjsir.org/index.php/biological-sciences/article/view/513