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Adsorption characteristics of S-Metolachlor onto the sawdust biochar derived from Acacia auriculiformis.
- Source :
- Journal of Environmental Science & Health. Part B. Pesticides, Food Contaminants & Agricultural Wastes; 2024, Vol. 59 Issue 4, p192-201, 10p
- Publication Year :
- 2024
-
Abstract
- The adsorption mechanism of S-Metolachlor in an aqueous solution by sawdust biochar derived from Acacia auriculiformis (SAB) was studied. SAB was manufactured at 500 °C for 4 h under oxygen-limited conditions and characterized for SEM, EDS, pHpzc, BET, and FTIR. The adsorption kinetics, isotherm, and diffusion studies of S-Metolachlor and SAB were further explored. Moreover, the effects of the solution pH were examined on the adsorption of S-Metolachlor by SAB. The BET analysis of SAB was achieved at 106.74 m<superscript>2</superscript>.g<superscript>−</superscript><superscript>1</superscript> and the solution pH did not significantly influence the S-Metolachlor adsorption. The adsorption data were fitted into a Langmuir isotherm and the PSO model. The film diffusion coefficient D<subscript>f</subscript> (4.93 × 10<superscript>−</superscript><superscript>11</superscript> to 8.17 × 10<superscript>−</superscript><superscript>11</superscript> m<superscript>2</superscript>.s<superscript>−</superscript><superscript>1</superscript>) and the particle diffusion coefficient D<subscript>p</subscript> (1.68 × 10<superscript>−</superscript><superscript>11</superscript> to 2.65 × 10<superscript>−</superscript><superscript>11</superscript> m<superscript>2</superscript>.s<superscript>−</superscript><superscript>1</superscript>) were determined and the rate-limiting step of S-Metolachlor adsorption and SAB was governed by liquid film diffusion. The S-Metolachlor adsorption process onto SAB was controlled by multiple mechanisms, including pore filling, H-bonding, hydrophobic interaction, and π-π EDA interactions. H-bonding is the main interaction for the adsorption of S-Metolachlor and SAB. Conclusively, the study illustrates that biochar produced from Acacia auriculiformis sawdust possessed effective adsorption properties for S-Metolachlor herbicide. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03601234
- Volume :
- 59
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Journal of Environmental Science & Health. Part B. Pesticides, Food Contaminants & Agricultural Wastes
- Publication Type :
- Academic Journal
- Accession number :
- 176146738
- Full Text :
- https://doi.org/10.1080/03601234.2024.2322767