Chemical Modifications of Cassava Peel as Adsorbent Material for Metals Ions from Wastewater
Residues from the processing of cassava roots (Manihot esculenta Crantz), or cassava peels, are evaluated as chemically modified adsorbents with H2O2, H2SO4, and NaOH, in the removal of metal ions Cd(II), Pb(II), and Cr(III) from contaminated water. Modified adsorbents were chemically characterized...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2016/3694174 |
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| author | Daniel Schwantes Affonso Celso Gonçalves Gustavo Ferreira Coelho Marcelo Angelo Campagnolo Douglas Cardoso Dragunski César Ricardo Teixeira Tarley Alisson Junior Miola Eduardo Ariel Völz Leismann |
| author_facet | Daniel Schwantes Affonso Celso Gonçalves Gustavo Ferreira Coelho Marcelo Angelo Campagnolo Douglas Cardoso Dragunski César Ricardo Teixeira Tarley Alisson Junior Miola Eduardo Ariel Völz Leismann |
| author_sort | Daniel Schwantes |
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| description | Residues from the processing of cassava roots (Manihot esculenta Crantz), or cassava peels, are evaluated as chemically modified adsorbents with H2O2, H2SO4, and NaOH, in the removal of metal ions Cd(II), Pb(II), and Cr(III) from contaminated water. Modified adsorbents were chemically characterized for their chemical composition and pHPZC (point of zero charge), while adsorption tests determined the best conditions of pH, adsorbent mass, and contact time between adsorbent and adsorbate in the process of removal of the metal ions. Isotherms obtained from the preliminary results were linearized by Langmuir’s and Freudlich’s models. The thermodynamic parameters, such as ΔH, ΔG, and ΔS, were also evaluated. The modifying solutions proposed were effective in the modification of adsorbents and resulted in high capacity sorption materials. Equilibrium time between adsorbent and adsorbate for the solutions contaminated with metals is about 40 minutes. The Langmuir model adjusted to most results, indicating monolayers adsorption of Cd(II), Pb(II), and Cr(III). The values obtained for Langmuir Qm show a higher adsorption capacity caused by chemical modifications, with values such as 19.54 mg Cd(II) per g of M. NaOH, 42.46 mg of Pb(II) per g of M. NaOH, and 43.97 mg of Cr(III) per g of M H2O2. Results showed that modified cassava peels are excellent adsorbent, renewable, high availability, and low-cost materials and a feasible alternative in the removal of metals in industries. |
| format | Article |
| id | doaj-art-321c63be31e14ababb3893b1b0ce6efb |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
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| series | Journal of Chemistry |
| spelling | doaj-art-321c63be31e14ababb3893b1b0ce6efb2025-02-03T06:13:47ZengWileyJournal of Chemistry2090-90632090-90712016-01-01201610.1155/2016/36941743694174Chemical Modifications of Cassava Peel as Adsorbent Material for Metals Ions from WastewaterDaniel Schwantes0Affonso Celso Gonçalves1Gustavo Ferreira Coelho2Marcelo Angelo Campagnolo3Douglas Cardoso Dragunski4César Ricardo Teixeira Tarley5Alisson Junior Miola6Eduardo Ariel Völz Leismann7Pontifical Catholic University of Parana, 85902-532 Toledo, PR, BrazilState University of Western Parana, 85960-000 Marechal Cândido Rondon, PR, BrazilDynamic Union of the Falls Colleges (UDC), 85884-000 Medianeira, PR, BrazilPontifical Catholic University of Parana, 85902-532 Toledo, PR, BrazilPontifical Catholic University of Parana, 85902-532 Toledo, PR, BrazilLondrina State University, 86057-970 Londrina, PR, BrazilState University of Western Parana, 85960-000 Marechal Cândido Rondon, PR, BrazilState University of Western Parana, 85960-000 Marechal Cândido Rondon, PR, BrazilResidues from the processing of cassava roots (Manihot esculenta Crantz), or cassava peels, are evaluated as chemically modified adsorbents with H2O2, H2SO4, and NaOH, in the removal of metal ions Cd(II), Pb(II), and Cr(III) from contaminated water. Modified adsorbents were chemically characterized for their chemical composition and pHPZC (point of zero charge), while adsorption tests determined the best conditions of pH, adsorbent mass, and contact time between adsorbent and adsorbate in the process of removal of the metal ions. Isotherms obtained from the preliminary results were linearized by Langmuir’s and Freudlich’s models. The thermodynamic parameters, such as ΔH, ΔG, and ΔS, were also evaluated. The modifying solutions proposed were effective in the modification of adsorbents and resulted in high capacity sorption materials. Equilibrium time between adsorbent and adsorbate for the solutions contaminated with metals is about 40 minutes. The Langmuir model adjusted to most results, indicating monolayers adsorption of Cd(II), Pb(II), and Cr(III). The values obtained for Langmuir Qm show a higher adsorption capacity caused by chemical modifications, with values such as 19.54 mg Cd(II) per g of M. NaOH, 42.46 mg of Pb(II) per g of M. NaOH, and 43.97 mg of Cr(III) per g of M H2O2. Results showed that modified cassava peels are excellent adsorbent, renewable, high availability, and low-cost materials and a feasible alternative in the removal of metals in industries.http://dx.doi.org/10.1155/2016/3694174 |
| spellingShingle | Daniel Schwantes Affonso Celso Gonçalves Gustavo Ferreira Coelho Marcelo Angelo Campagnolo Douglas Cardoso Dragunski César Ricardo Teixeira Tarley Alisson Junior Miola Eduardo Ariel Völz Leismann Chemical Modifications of Cassava Peel as Adsorbent Material for Metals Ions from Wastewater Journal of Chemistry |
| title | Chemical Modifications of Cassava Peel as Adsorbent Material for Metals Ions from Wastewater |
| title_full | Chemical Modifications of Cassava Peel as Adsorbent Material for Metals Ions from Wastewater |
| title_fullStr | Chemical Modifications of Cassava Peel as Adsorbent Material for Metals Ions from Wastewater |
| title_full_unstemmed | Chemical Modifications of Cassava Peel as Adsorbent Material for Metals Ions from Wastewater |
| title_short | Chemical Modifications of Cassava Peel as Adsorbent Material for Metals Ions from Wastewater |
| title_sort | chemical modifications of cassava peel as adsorbent material for metals ions from wastewater |
| url | http://dx.doi.org/10.1155/2016/3694174 |
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