Study of Sorption Kinetics and Sorption–Desorption Models to Assess the Transport Mechanisms of 2,4-Dichlorophenoxyacetic Acid on Volcanic Soils
| Autor: | Bruno Loch-Arellano, Mauricio Escudey, Jocelyn Parra-Rivero, Jorge Rodríguez-Becerra, Valentina Dominguez-Vera, Lizethly Cáceres-Jensen, Lorena Barrientos, Carlos Garrido |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
sorption kinetics models
Health Toxicology and Mutagenesis Diffusion MathematicsofComputing_GENERAL 010501 environmental sciences 01 natural sciences Article Soil chemistry.chemical_compound herbicides Groundwater pollution Mass transfer Humans Soil Pollutants Organic matter Carboxylate 0105 earth and related environmental sciences chemistry.chemical_classification spectroscopic analysis variable-charge-soils Public Health Environmental and Occupational Health Sorption 04 agricultural and veterinary sciences sorption mechanism Andisol Kinetics TheoryofComputation_MATHEMATICALLOGICANDFORMALLANGUAGES chemistry Environmental chemistry Soil water 040103 agronomy & agriculture Medicine 0401 agriculture forestry and fisheries Adsorption 2 4-Dichlorophenoxyacetic Acid |
| Zdroj: | International Journal of Environmental Research and Public Health Volume 18 Issue 12 International Journal of Environmental Research and Public Health, Vol 18, Iss 6264, p 6264 (2021) |
| ISSN: | 1660-4601 |
| DOI: | 10.3390/ijerph18126264 |
| Popis: | The sorption behavior of 2,4-dichlorophenoxyacetic acid (2,4-D) in the abundant agricultural volcanic ash-derived soils (VADS) is not well understood despite being widely used throughout the world, causing effects to the environment and human health. The environmental behavior and risk assessment of groundwater pollution by pesticides can be evaluated through kinetic models. This study evaluated the sorption kinetics and 2,4-D sorption–desorption in ten VADS through batch sorption experiments. Differences in the sorption extent for the fast and slow phases was observed through the IPD model where 2,4-D sorption kinetics was controlled by external mass transfer and intra organic matter diffusion in Andisols (C1 ≠ 0). We confirmed from the spectroscopic analysis that the carboxylate group directly drives the interaction of 2,4-D on Andisol soil. The MLR model showed that IEP, FeDCB, and pH×Silt are important soil descriptors in the 2,4-D sorption in VADS. The Freundlich model accurately represented sorption equilibrium data in all cases (Kf values between 1.1 and 24.1 µg1−1/n mL1/ng−1) with comparatively higher sorption capacity on Andisols, where the highest hysteresis was observed in soils that presented the highest and lowest OC content (H close to 0). |
| Databáze: | OpenAIRE |
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