Reduction of hypervalent chromium in acidic media by alginic acid
作者： Fernando A. Bertoni , Sebastian E. Bellú , Juan C. González , Luis F. Sala
DOI: 10.1016/J.CARBPOL.2014.07.065
关键词:
摘要: Abstract Selective oxidation of carboxylate groups present in alginic acid by Cr VI affords CO 2 , oxidized acid, and III as final products. The redox reaction afforded first-order kinetics [alginic acid], [Cr ], [H + at fixed ionic strength temperature. Kinetic studies showed that the proceeds through a mechanism which combines →Cr IV → Cr II pathways. was supported observation free radicals, CrO 2+ V intermediates. reduction independently studied it found to occur more than 10 3 times faster acid/Cr reaction, media. At pH 1–3, oxo-chromate(V)–alginic species remain solution during several hours 15 °C. results this abundant structural polysaccharide on brown seaweeds is able reduce VI/V/IV or stabilize high-valent chromium depending value.
sci-hub.se 参考文章(52)
Luis F. Sala, Juan C. González, Silvia I. García, María I. Frascaroli, Sabine Van Doorslaer, Detection and structural characterization of oxo-chromium(V)-sugar complexes by electron paramagnetic resonance. Advances in Carbohydrate Chemistry and Biochemistry. ,vol. 66, pp. 69- 120 ,(2011) , 10.1016/B978-0-12-385518-3.00002-X
M. Krumpolc, J. Roček, G. P. Haight, Patrick Merrill, Sodium Bis[2‐Ethyl‐2‐Hydroxybutyrato(2‐)]‐Oxochromate(V) Inorganic Syntheses, Volume 20. pp. 63- 65 ,(2007) , 10.1002/9780470132517.CH19
Andrew Eaton, A.E. Greenberg, Lenore S. Clesceri, Standard methods for the examination of water and wastewater Published in <b>1998</b> in Washington DC) by American public health association. ,(1992)
Refat Hassan, Samia Ibrahim, Abdel Rahman Dahy, Ishaq Zaafarany, Fahd Tirkistani, Hideo Takagi, Kinetics and mechanism of oxidation of chondroitin-4-sulfate polysaccharide by chromic acid in aqueous perchlorate solutions Carbohydrate Polymers. ,vol. 92, pp. 2321- 2326 ,(2013) , 10.1016/J.CARBPOL.2012.11.062
Joaquin F. Perez-Benito, Conchita Arias, A kinetic study on the reactivity of chromium(IV) Canadian Journal of Chemistry. ,vol. 71, pp. 649- 655 ,(1993) , 10.1139/V93-087
Nicola E Brasch, David A Buckingham, A Bram Evans, Charles R Clark, None, 17O NMR Study of Chromium(VI) Ions in Water Journal of the American Chemical Society. ,vol. 118, pp. 7969- 7980 ,(1996) , 10.1021/JA960843J
H Diehl, Wet oxidation of organic matter employing mixed perchloric and sulphuric acids at controlled temperatures and graded high potentials Talanta. ,vol. 2, pp. 209- 219 ,(1959) , 10.1016/0039-9140(59)80002-3
Antonio Maureira, Bernabé L. Rivas, Metal ions recovery with alginic acid coupled to ultrafiltration membrane European Polymer Journal. ,vol. 45, pp. 573- 581 ,(2009) , 10.1016/J.EURPOLYMJ.2008.11.021
Andreja Bakac, Susannah L. Scott, James H. Espenson, Kenton R. Rodgers, Interaction of Chromium(II) Complexes with Molecular Oxygen. Spectroscopic and Kinetic Evidence for .eta.1-Superoxo Complex Formation Journal of the American Chemical Society. ,vol. 117, pp. 6483- 6488 ,(1995) , 10.1021/JA00129A010
M. I. Frascaroli, S. Van Doorslaer, J. M. Salas Peregrin, L. F. Sala, M. F. Mangiameli, J. C. González, S. I. García, New insights on the mechanism of oxidation of D-galacturonic acid by hypervalent chromium. Dalton Transactions. ,vol. 40, pp. 7033- 7045 ,(2011) , 10.1039/C1DT10214A