Extraction and recovery of soft metal ion by porous silica coated by hydrophilic polymer gel with hexavalent nitrogen-donor ligand. Issue 9 (13th June 2018)

• Record Type: Journal Article
• Authors: Kawamura, Takuya; Takeshita, Kenji
• Is Part Of: Separation science and technology. Volume 53:Issue 9(2018)
• Page Start: 1319
• Page End: 1326
• Publication Date: 2018-06-13
• Subjects: Coating -- extraction chromatography -- extraction -- polymer gel -- soft metal; Separation (Technology) -- Periodicals; 660.284205
• DOI: 10.1080/01496395.2017.1414253
• Languages: English
• ISSNs: 0149-6395

Abstract

ABSTRACT: A hydrophilic N -isopropylacrylamide (NIPA) gel copolymerized with a hexavalent nitrogen donor ligand, N, N, N', N' -tetrakis(4-propenyloxy-2-pyridylmethyl)ethylenediamine (TPPEN), adsorbs soft metals selectively from the acidic aqueous phase. We are developing porous silica particles coating the TPPEN-NIPA gel with high TPPEN content thinly on the pore surface of porous silica by a new gel-coating method using surface tension. Half of the pore volume of the silica particles remained by the coating of the TPPEN-NIPA gel with the high TPPEN content of 30 mol%. A large separation factor (SF) of Cd(II)/Eu(III) of 60 was observed at pH 2. The proposed chromatographic agent with the high TPPEN content is applicable for practical use.