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- W2799804902 abstract "Elimination of U(VI) from nuclear wastes and from the underground water near the uranium mines is the serious problem. Therefore search for new sorbents for U(VI) is still a big challenge for the scientists. This paper investigates of U(VI) ions sorption on halloysite modified with the isothiouronium salts: S-dodecaneisothiouronium bromide (ligand 1), S,S'-dodecane-1,12-diylbis(isothiouronium bromide) (ligand 2), S-hexadecaneisothiouronium chloride (ligand 3), S,S'-naphthalene-1,4-diylbis(methylisothiouronium) dichloride (ligand 4), and S,S'-2,5-dimethylbenzene-1,4-diylbis(methylisothiouronium) dichloride (ligand 5). It was established that halloysite modified by the ligands with four nitrogen atoms in their structure (ligand-5, 2 and 4) was characterized by higher sorption capacity compared with that modified by the ligands with two donor nitrogens (ligand-1 and 3). The maximum sorption capacity of halloysite-5 toward U(VI) was 157 mg U/g and this places the modified mineral among the most effective sorbents for U(VI) removal from wastes. As follows from ATR, XPS and thermal degradation spectra of the sorption products [R-S-C(NH)(NH2)]n = 1-2(UO22+) complexes are formed on the external surface of the halloysite whereas oligomeric hydroxy complexes (UO2)3(OH)5+ and (UO2)4(OH)7+ are present in the interior of halloysite structure and interact predominantly with aluminols." @default.
- W2799804902 created "2018-05-17" @default.
- W2799804902 creator A5038571972 @default.
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- W2799804902 creator A5054199294 @default.
- W2799804902 date "2018-07-01" @default.
- W2799804902 modified "2023-10-16" @default.
- W2799804902 title "The use of halloysite functionalized with isothiouronium salts as an organic/inorganic hybrid adsorbent for uranium(VI) ions removal" @default.
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- W2799804902 doi "https://doi.org/10.1016/j.jhazmat.2018.03.057" @default.
- W2799804902 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29747148" @default.
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