Modelling atrazine sorption in carbon-rich substrates: a case study
9 páginas.- 3 figuras.- 5 tablas.- 29 referencias
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| Language: | English |
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Sociedade Brasileira da Ciência das Plantas Daninhas
2023
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| Subjects: | 3C NMR CP/MAS, Charcoal fines, Chemical composition, Composted pig slurry, Isotherm models, |
| Online Access: | http://hdl.handle.net/10261/296600 |
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dig-irnas-es-10261-2966002023-03-03T11:26:31Z Modelling atrazine sorption in carbon-rich substrates: a case study Dick, D. P. Lara, Larissa Z. da Costa, Janaina B. Fontaniva, C. Lüdtke, A.C. Knicker, Heike Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil) Dick, D. P. [0000-0002-5615-8611] Lara, Larissa Z. [0000-0001-8434-0480] da Costa, Janaina B. [0000-0003-4913-4264] Fontaniva, C. [0000-0002-0866-9687] Lüdtke, A.C. [0000-0003-4913-4264] Knicker, Heike [0000-0002-0483-2109] 3C NMR CP/MAS Charcoal fines Chemical composition Composted pig slurry Isotherm models 9 páginas.- 3 figuras.- 5 tablas.- 29 referencias Background: The use of carbonaceous materials for environmental remediation is attractive due to low expense and high sorption capacity. However, their efficiency in contaminant removal is affected by substrate composition and sorption mechanism.Objective: This study investigated atrazine sorption and desorption in three carbon-rich substrates. Data were evaluated considering isotherm models and sorbent chemical composition.Methods: Sorption was performed by the batch equilibrium method with three substrates obtained from pig slurry composting with different proportions (w/w) of charcoal fines (CF): CF0, CF9 (9% CF), and CF18 (18% CF). The substrates were characterized by elemental analysis, 13C NMR CP/MAS spectroscopy. The Freundlich and Dubinin-Radushkevich (DRK) models better fitted the sorption data (0.96>R2>0.81), followed by Temkin (0.95>R2>0.76). Charcoal addition to composting substrates increased carbon content and the aromaticity in the order CF0<CF9< CF18. However, the sorption affinity decreased in the opposite order as indicated by the Kf values: 675, 335 and 290 L kg-1, respectively. Values of the E parameter (DRK) varied from 8.05 to 8.29 kJ mol-1, suggesting a predominant physical sorption mechanism, whereas the Bt coefficient (Temkin) indicated an endothermic process. Desorption was only observed at higher atrazine concentrations (>10 mg L-1), and the desorption Kf values were greater than the respective sorption values. Conclusions: Atrazine sorption in the tested C-rich substrates is not governed by the carbon content or aromaticity. The low sorption reversibility implies a low atrazine mobility from the tested substrates and suggests their potential for herbicide removal in the environment. © 2023, Sociedade Brasileira da Ciencia das Plantas Daninha. All rights reserved. The authors acknowledge the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for financial support and scholarships for this Project Peer reviewed 2023-03-03T11:26:30Z 2023-03-03T11:26:30Z 2023 artículo Advances in Weed Science 40: e020220061 (2023) http://hdl.handle.net/10261/296600 2675-9462 en Publisher's version http://dx.doi.org/10.51694/AdvWeedSci/2022;40:00025 Sí open Sociedade Brasileira da Ciência das Plantas Daninhas |
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3C NMR CP/MAS Charcoal fines Chemical composition Composted pig slurry Isotherm models 3C NMR CP/MAS Charcoal fines Chemical composition Composted pig slurry Isotherm models |
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3C NMR CP/MAS Charcoal fines Chemical composition Composted pig slurry Isotherm models 3C NMR CP/MAS Charcoal fines Chemical composition Composted pig slurry Isotherm models Dick, D. P. Lara, Larissa Z. da Costa, Janaina B. Fontaniva, C. Lüdtke, A.C. Knicker, Heike Modelling atrazine sorption in carbon-rich substrates: a case study |
| description |
9 páginas.- 3 figuras.- 5 tablas.- 29 referencias |
| author2 |
Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil) |
| author_facet |
Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil) Dick, D. P. Lara, Larissa Z. da Costa, Janaina B. Fontaniva, C. Lüdtke, A.C. Knicker, Heike |
| format |
artículo |
| topic_facet |
3C NMR CP/MAS Charcoal fines Chemical composition Composted pig slurry Isotherm models |
| author |
Dick, D. P. Lara, Larissa Z. da Costa, Janaina B. Fontaniva, C. Lüdtke, A.C. Knicker, Heike |
| author_sort |
Dick, D. P. |
| title |
Modelling atrazine sorption in carbon-rich substrates: a case study |
| title_short |
Modelling atrazine sorption in carbon-rich substrates: a case study |
| title_full |
Modelling atrazine sorption in carbon-rich substrates: a case study |
| title_fullStr |
Modelling atrazine sorption in carbon-rich substrates: a case study |
| title_full_unstemmed |
Modelling atrazine sorption in carbon-rich substrates: a case study |
| title_sort |
modelling atrazine sorption in carbon-rich substrates: a case study |
| publisher |
Sociedade Brasileira da Ciência das Plantas Daninhas |
| publishDate |
2023 |
| url |
http://hdl.handle.net/10261/296600 |
| work_keys_str_mv |
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