Efeito da ativação química nas propriedades de superfície de xisto retortado
A pyrolyzed oil shale by-product known as retorted shale was functionalized with HCl, HNO3, H2SO4, H3PO4, HNO3/H2SO4 (3:1), Fenton's reagent, (NH4)2S2O7, NaOH, and KMnO4 using either ultrasound (Route 1) or reflux (Route 2). The products obtained were evaluated in terms of cation exchange capac...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2016-05-01
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| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422016000400431&lng=en&tlng=en |
| _version_ | 1811211840063012864 |
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| author | Marta Eliane Doumer Gilberto Abate Iara Messerschmidt Lívia Mari Assis Rosane Martinazzo Carlos Augusto Posser Silveira |
| author_facet | Marta Eliane Doumer Gilberto Abate Iara Messerschmidt Lívia Mari Assis Rosane Martinazzo Carlos Augusto Posser Silveira |
| author_sort | Marta Eliane Doumer |
| collection | DOAJ |
| description | A pyrolyzed oil shale by-product known as retorted shale was functionalized with HCl, HNO3, H2SO4, H3PO4, HNO3/H2SO4 (3:1), Fenton's reagent, (NH4)2S2O7, NaOH, and KMnO4 using either ultrasound (Route 1) or reflux (Route 2). The products obtained were evaluated in terms of cation exchange capacity (CEC). Structural characterization was performed using X-ray diffraction, X-ray fluorescence, and infrared spectroscopy to identify the functional groups present. The best results were achieved using Route 2 with solutions of either H3PO4 or HNO3/H2SO4 (3:1), giving CEC values of 315 and 316 mmolc kg-1, respectively. The pyrolyzed oil shale functionalized using Route 2 (reflux) with NaOH as the activating agent showed the highest sorption of methylene blue (35.6 mg g-1). The main mechanisms observed for oil shale by-product functionalization were oxidation, nitration, and CaO leaching. |
| first_indexed | 2024-04-12T05:19:00Z |
| format | Article |
| id | doaj.art-2d505b5ce2db4ad3861333f5a2a88143 |
| institution | Directory Open Access Journal |
| issn | 1678-7064 |
| language | English |
| last_indexed | 2024-04-12T05:19:00Z |
| publishDate | 2016-05-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-2d505b5ce2db4ad3861333f5a2a881432022-12-22T03:46:32ZengSociedade Brasileira de QuímicaQuímica Nova1678-70642016-05-0139443143610.5935/0100-4042.20160051S0100-40422016000400431Efeito da ativação química nas propriedades de superfície de xisto retortadoMarta Eliane DoumerGilberto AbateIara MesserschmidtLívia Mari AssisRosane MartinazzoCarlos Augusto Posser SilveiraA pyrolyzed oil shale by-product known as retorted shale was functionalized with HCl, HNO3, H2SO4, H3PO4, HNO3/H2SO4 (3:1), Fenton's reagent, (NH4)2S2O7, NaOH, and KMnO4 using either ultrasound (Route 1) or reflux (Route 2). The products obtained were evaluated in terms of cation exchange capacity (CEC). Structural characterization was performed using X-ray diffraction, X-ray fluorescence, and infrared spectroscopy to identify the functional groups present. The best results were achieved using Route 2 with solutions of either H3PO4 or HNO3/H2SO4 (3:1), giving CEC values of 315 and 316 mmolc kg-1, respectively. The pyrolyzed oil shale functionalized using Route 2 (reflux) with NaOH as the activating agent showed the highest sorption of methylene blue (35.6 mg g-1). The main mechanisms observed for oil shale by-product functionalization were oxidation, nitration, and CaO leaching.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422016000400431&lng=en&tlng=encation exchange capacitypyrolyzed shalemethylene bluefunctional groups |
| spellingShingle | Marta Eliane Doumer Gilberto Abate Iara Messerschmidt Lívia Mari Assis Rosane Martinazzo Carlos Augusto Posser Silveira Efeito da ativação química nas propriedades de superfície de xisto retortado Química Nova cation exchange capacity pyrolyzed shale methylene blue functional groups |
| title | Efeito da ativação química nas propriedades de superfície de xisto retortado |
| title_full | Efeito da ativação química nas propriedades de superfície de xisto retortado |
| title_fullStr | Efeito da ativação química nas propriedades de superfície de xisto retortado |
| title_full_unstemmed | Efeito da ativação química nas propriedades de superfície de xisto retortado |
| title_short | Efeito da ativação química nas propriedades de superfície de xisto retortado |
| title_sort | efeito da ativacao quimica nas propriedades de superficie de xisto retortado |
| topic | cation exchange capacity pyrolyzed shale methylene blue functional groups |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422016000400431&lng=en&tlng=en |
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