Removal of lead ions by acid activated and manganese oxide-coated bentonite
In: Journal of Hazardous Materials, Jg. 161 (2009), S. 677-685
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WOS: 000262292400011 PubMed ID: 18501507 This paper presents the adsorption of Pb(II) from aqua solutions onto Unye (Turkey) bentonite in raw (RB), acid activated (AAB) and manganese oxide-coated (MCB) forms. Adsorption of Pb(H) by RB, AAB and MCB sample was investigated as a function of the initial Pb(II) concentration, solution pH, ionic strength, temperature and inorganic ligand (Cl-). Changes in the surfaces and structure were characterized by means of XRD, IR and potentiometric titration. The Langmuir monolayer adsorption capacities of RB, AAB and MCB in 0.1 M KNO3 solution were estimated as 16.70, 8.92 and 58.88 mg/g, respectively. The spontaneity of the adsorption process is established by decrease in Delta G which varied from -21.60 to -28.60kJ/mol (RB), -22.63 to -29.98 kJ/moI (AAB) and -19.57 to -26.22 (MCB) in temperature range 303-338 K. (C) 2008 Elsevier B.V. All rights reserved.
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Removal of lead ions by acid activated and manganese oxide-coated bentonite
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Autor/in / Beteiligte Person: | Eren, Erdal ; Afsin, B. ; Önal, Yunus ; Kırşehir Ahi Evran Üniversitesi, Fen-Edebiyat Fakültesi, Kimya Bölümü ; Ondokuz Mayıs Üniversitesi |
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Zeitschrift: | Journal of Hazardous Materials, Jg. 161 (2009), S. 677-685 |
Veröffentlichung: | Elsevier BV, 2009 |
Medientyp: | unknown |
ISSN: | 0304-3894 (print) |
DOI: | 10.1016/j.jhazmat.2008.04.020 |
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