Binding of Pb(II) in the system humic acid/goethite at acidic pH
The study of Pb(II) binding to the system humic acid/goethite in acidic medium is reported in the present paper. From a macroscopic point of view, we have constructed the experimental sorption isotherms (using atomic absorption spectroscopy) and compared them with the prediction of the additivity ru...
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todo:paper_00456535_v65_n11_p2313_Orsetti2023-10-03T14:52:01Z Binding of Pb(II) in the system humic acid/goethite at acidic pH Orsetti, S. de las Mercedes Quiroga, M. Andrade, E.M. Metal pollution Multisubstrate adsorption Oxide-humate-metal complex Soil Chemistry Adsorption Adsorption isotherms Complexation Infrared spectroscopy Lead Organic acids Metal pollution Multisubstrate adsorption Oxide-humate-metal complex Soil Chemistry Soil pollution cation ferric hydroxide humic acid lead oxide proton Adsorption Adsorption isotherms Complexation Infrared spectroscopy Lead Organic acids Soil pollution goethite humic acid lead oxide pH soil chemistry soil pollution sorption acidity article atomic absorption spectrometry comparative study infrared spectroscopy metal binding pH prediction soil pollution Humic Substances Hydrogen-Ion Concentration Iron Compounds Lead Spectrophotometry, Infrared Spectrophotometry, Ultraviolet Spectroscopy, Fourier Transform Infrared The study of Pb(II) binding to the system humic acid/goethite in acidic medium is reported in the present paper. From a macroscopic point of view, we have constructed the experimental sorption isotherms (using atomic absorption spectroscopy) and compared them with the prediction of the additivity rule. It is found that this system presents positive deviations, that is, the amount sorbed is about an order of magnitude higher than predicted. Apart from this, microscopic and structural aspects have also been studied using in situ and ex situ infrared spectroscopy. These results suggest that the presence of Pb(II) increases the amount of humic acid bound to the oxide. It is proposed that proton displacement due to the interaction between humic substances and the oxide, along with the formation of ternary complexes with the Pb(II) cation bridging the oxide and the humic substances (Type A complexes), cause the deviation from additivity. © 2006 Elsevier Ltd. All rights reserved. Fil:Orsetti, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Andrade, E.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00456535_v65_n11_p2313_Orsetti |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Metal pollution Multisubstrate adsorption Oxide-humate-metal complex Soil Chemistry Adsorption Adsorption isotherms Complexation Infrared spectroscopy Lead Organic acids Metal pollution Multisubstrate adsorption Oxide-humate-metal complex Soil Chemistry Soil pollution cation ferric hydroxide humic acid lead oxide proton Adsorption Adsorption isotherms Complexation Infrared spectroscopy Lead Organic acids Soil pollution goethite humic acid lead oxide pH soil chemistry soil pollution sorption acidity article atomic absorption spectrometry comparative study infrared spectroscopy metal binding pH prediction soil pollution Humic Substances Hydrogen-Ion Concentration Iron Compounds Lead Spectrophotometry, Infrared Spectrophotometry, Ultraviolet Spectroscopy, Fourier Transform Infrared |
| spellingShingle |
Metal pollution Multisubstrate adsorption Oxide-humate-metal complex Soil Chemistry Adsorption Adsorption isotherms Complexation Infrared spectroscopy Lead Organic acids Metal pollution Multisubstrate adsorption Oxide-humate-metal complex Soil Chemistry Soil pollution cation ferric hydroxide humic acid lead oxide proton Adsorption Adsorption isotherms Complexation Infrared spectroscopy Lead Organic acids Soil pollution goethite humic acid lead oxide pH soil chemistry soil pollution sorption acidity article atomic absorption spectrometry comparative study infrared spectroscopy metal binding pH prediction soil pollution Humic Substances Hydrogen-Ion Concentration Iron Compounds Lead Spectrophotometry, Infrared Spectrophotometry, Ultraviolet Spectroscopy, Fourier Transform Infrared Orsetti, S. de las Mercedes Quiroga, M. Andrade, E.M. Binding of Pb(II) in the system humic acid/goethite at acidic pH |
| topic_facet |
Metal pollution Multisubstrate adsorption Oxide-humate-metal complex Soil Chemistry Adsorption Adsorption isotherms Complexation Infrared spectroscopy Lead Organic acids Metal pollution Multisubstrate adsorption Oxide-humate-metal complex Soil Chemistry Soil pollution cation ferric hydroxide humic acid lead oxide proton Adsorption Adsorption isotherms Complexation Infrared spectroscopy Lead Organic acids Soil pollution goethite humic acid lead oxide pH soil chemistry soil pollution sorption acidity article atomic absorption spectrometry comparative study infrared spectroscopy metal binding pH prediction soil pollution Humic Substances Hydrogen-Ion Concentration Iron Compounds Lead Spectrophotometry, Infrared Spectrophotometry, Ultraviolet Spectroscopy, Fourier Transform Infrared |
| description |
The study of Pb(II) binding to the system humic acid/goethite in acidic medium is reported in the present paper. From a macroscopic point of view, we have constructed the experimental sorption isotherms (using atomic absorption spectroscopy) and compared them with the prediction of the additivity rule. It is found that this system presents positive deviations, that is, the amount sorbed is about an order of magnitude higher than predicted. Apart from this, microscopic and structural aspects have also been studied using in situ and ex situ infrared spectroscopy. These results suggest that the presence of Pb(II) increases the amount of humic acid bound to the oxide. It is proposed that proton displacement due to the interaction between humic substances and the oxide, along with the formation of ternary complexes with the Pb(II) cation bridging the oxide and the humic substances (Type A complexes), cause the deviation from additivity. © 2006 Elsevier Ltd. All rights reserved. |
| format |
JOUR |
| author |
Orsetti, S. de las Mercedes Quiroga, M. Andrade, E.M. |
| author_facet |
Orsetti, S. de las Mercedes Quiroga, M. Andrade, E.M. |
| author_sort |
Orsetti, S. |
| title |
Binding of Pb(II) in the system humic acid/goethite at acidic pH |
| title_short |
Binding of Pb(II) in the system humic acid/goethite at acidic pH |
| title_full |
Binding of Pb(II) in the system humic acid/goethite at acidic pH |
| title_fullStr |
Binding of Pb(II) in the system humic acid/goethite at acidic pH |
| title_full_unstemmed |
Binding of Pb(II) in the system humic acid/goethite at acidic pH |
| title_sort |
binding of pb(ii) in the system humic acid/goethite at acidic ph |
| url |
http://hdl.handle.net/20.500.12110/paper_00456535_v65_n11_p2313_Orsetti |
| work_keys_str_mv |
AT orsettis bindingofpbiiinthesystemhumicacidgoethiteatacidicph AT delasmercedesquirogam bindingofpbiiinthesystemhumicacidgoethiteatacidicph AT andradeem bindingofpbiiinthesystemhumicacidgoethiteatacidicph |
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1807316685243285504 |