Synthesis of MnO2 on activated carbon and its potential application in the adsorption of As(V) and Pb(II) in aqueous solutions
The conditions for the synthesis of a material with MnO2 (OMD) on activated carbon (AC) were studied. These conditions were: reaction time, temperature, stirring speed, concentrations of AC, H2SO4, and O3 in solution, and particle size. Agglomerates on AC were observed by means of scanning electron...
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| Format: | Article |
| Language: | English |
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Slovenian Chemical Society
2017-06-01
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| Series: | Acta Chimica Slovenica |
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| Online Access: | https://journals.matheo.si/index.php/ACSi/article/view/3274 |
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| author | Roberto Contreras-Bustos E. Manríquez-Reza Jaime Jiménez-Becerril Melania Jimenez-Reyes Bibiana Cercado-Quezada |
| author_facet | Roberto Contreras-Bustos E. Manríquez-Reza Jaime Jiménez-Becerril Melania Jimenez-Reyes Bibiana Cercado-Quezada |
| author_sort | Roberto Contreras-Bustos |
| collection | DOAJ |
| description | The conditions for the synthesis of a material with MnO2 (OMD) on activated carbon (AC) were studied. These conditions were: reaction time, temperature, stirring speed, concentrations of AC, H2SO4, and O3 in solution, and particle size. Agglomerates on AC were observed by means of scanning electron microscopy (SEM) and microanalysis by energy dispersive spectroscopy (EDS) and revealed the presence of OMD deposited on the surface. The activation energy and the factor of frequency for the reaction were determined as Ea = 1.2 kcal/mol and A = 2.2. The value of Ea indicates that the precipitation of OMD on the AC was controlled by mass transfer in aqueous solution and the order of reaction was zero.
The adsorption capacities of AC were q = 14 mg Pb(II)/g AC and q = 9.1 mg As(V)/g AC. Whereas, for the OMD/AC obtained in the following conditions: [AC] 1 or 2 g/L, particle size of AC of +0.59 mm, [H2SO4] 1 or 2 mol/L, 25 °C, stirring speed 600 rpm, and [O3] 1.35 mol/L, the adsorption capacities were q = 90.5 mg Pb(II)/g OMD/AC and 25.4 mg As(V)/g OMD/AC. Therefore, the fixing of OMD on the surface of the AC greatly improved the removal of both Pb(II) and As(V)from aqueous solutions. |
| first_indexed | 2024-12-12T11:49:55Z |
| format | Article |
| id | doaj.art-6a63cf98b588487bb9ecde8a594c5530 |
| institution | Directory Open Access Journal |
| issn | 1318-0207 1580-3155 |
| language | English |
| last_indexed | 2024-12-12T11:49:55Z |
| publishDate | 2017-06-01 |
| publisher | Slovenian Chemical Society |
| record_format | Article |
| series | Acta Chimica Slovenica |
| spelling | doaj.art-6a63cf98b588487bb9ecde8a594c55302022-12-22T00:25:21ZengSlovenian Chemical SocietyActa Chimica Slovenica1318-02071580-31552017-06-0164243844810.17344/acsi.2017.3274474Synthesis of MnO2 on activated carbon and its potential application in the adsorption of As(V) and Pb(II) in aqueous solutionsRoberto Contreras-Bustos0E. Manríquez-Reza1Jaime Jiménez-Becerril2Melania Jimenez-Reyes3Bibiana Cercado-Quezada4Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C.Centro de Investigación y Desarrollo Tecnológico en Electroquímica S. C.Instituto Nacional de Investigaciones NuclearesInstituto Nacional de Investigaciones NuclearesCentro de Investigación y Desarrollo Tecnológico en Electroquímica S. C.The conditions for the synthesis of a material with MnO2 (OMD) on activated carbon (AC) were studied. These conditions were: reaction time, temperature, stirring speed, concentrations of AC, H2SO4, and O3 in solution, and particle size. Agglomerates on AC were observed by means of scanning electron microscopy (SEM) and microanalysis by energy dispersive spectroscopy (EDS) and revealed the presence of OMD deposited on the surface. The activation energy and the factor of frequency for the reaction were determined as Ea = 1.2 kcal/mol and A = 2.2. The value of Ea indicates that the precipitation of OMD on the AC was controlled by mass transfer in aqueous solution and the order of reaction was zero. The adsorption capacities of AC were q = 14 mg Pb(II)/g AC and q = 9.1 mg As(V)/g AC. Whereas, for the OMD/AC obtained in the following conditions: [AC] 1 or 2 g/L, particle size of AC of +0.59 mm, [H2SO4] 1 or 2 mol/L, 25 °C, stirring speed 600 rpm, and [O3] 1.35 mol/L, the adsorption capacities were q = 90.5 mg Pb(II)/g OMD/AC and 25.4 mg As(V)/g OMD/AC. Therefore, the fixing of OMD on the surface of the AC greatly improved the removal of both Pb(II) and As(V)from aqueous solutions.https://journals.matheo.si/index.php/ACSi/article/view/3274MnO2Activated carbonLead, ArsenicAdsorption |
| spellingShingle | Roberto Contreras-Bustos E. Manríquez-Reza Jaime Jiménez-Becerril Melania Jimenez-Reyes Bibiana Cercado-Quezada Synthesis of MnO2 on activated carbon and its potential application in the adsorption of As(V) and Pb(II) in aqueous solutions Acta Chimica Slovenica MnO2 Activated carbon Lead, Arsenic Adsorption |
| title | Synthesis of MnO2 on activated carbon and its potential application in the adsorption of As(V) and Pb(II) in aqueous solutions |
| title_full | Synthesis of MnO2 on activated carbon and its potential application in the adsorption of As(V) and Pb(II) in aqueous solutions |
| title_fullStr | Synthesis of MnO2 on activated carbon and its potential application in the adsorption of As(V) and Pb(II) in aqueous solutions |
| title_full_unstemmed | Synthesis of MnO2 on activated carbon and its potential application in the adsorption of As(V) and Pb(II) in aqueous solutions |
| title_short | Synthesis of MnO2 on activated carbon and its potential application in the adsorption of As(V) and Pb(II) in aqueous solutions |
| title_sort | synthesis of mno2 on activated carbon and its potential application in the adsorption of as v and pb ii in aqueous solutions |
| topic | MnO2 Activated carbon Lead, Arsenic Adsorption |
| url | https://journals.matheo.si/index.php/ACSi/article/view/3274 |
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