Extraction of mercury from aqueous iodide solutions by trilaurylamine N-oxide and its subsequent determination by atomic absorption spectrometry |
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| Authors: | M Rashid M Ejaz |
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| Institution: | (1) Department of Chemistry, University of Petroleum and Minerals, 31261 Dhahran, Saudi Arabia;(2) Department of Chemical Engineering, College of Engineering, King Abdul Aziz University, Jeddah, Saudi Arabia |
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| Abstract: | A solvent extraction technique using 0.01M solution of trilaurylamine N-oxide in benzene as extractant has been used to concentrate mercury efficiently from water solutions with or without the presence of 0.02M KI in weakly acidic media. In addition to unmodified aqueous solutions, mercury can be extracted quantitatively from aqueous iodide solutions that are up to 1M in HCl, H2SO4, and HNO3 in a single equilibration. Distribution coefficients and separation factors of several elements relative to mercury(II) are reported for media that contain 0.1 M HCl and 0.02M KI. The reagent is superior to aliphatic amines and quaternary amines for the extraction of mercury from aqueous iodide solutions. |
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| Keywords: | mercury solvent extraction trilaurylamine N-oxide amine oxide |
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