Title: Study on green extraction separation and enrichment of Hg(II) in potassium bromide-water-n-Propyl Alcohol system by Phase separation
Abstract: The extraction and separation of Hg(Ⅱ) from other metal ions with potassium bromide-water-n-propyl alcohol system were studied.The results showed that the n-propyl alcohol-water could be well divided into two phases when ammonia sulfate was added.Hg(Ⅱ)could react with potassium bromide to form [HgBr42-][C3H7OH2+]2,and this associated complex could be completely extracted by n-propyl alcohol phase.When the system contained 8.0×10-3 mol/L potassium bromide,0.2g/mL ammonia sulfate and 30% n-propyl alcohol(V/V),Hg(Ⅱ) was well separated from Co(II),Mg(II),Fe(III),Cu(II),Ni(II),Ag(Ⅰ),Al(III),Bi(III),Pb(II),U(Ⅵ),V(Ⅴ),W(Ⅵ) and Cr(III),and the extraction recoveries of Hg(Ⅱ) were over 97.3%.The developed method could be used to separate and concentrate trace level of mercury.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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