Persistence, mitigation and leaching of atrazine and its metabolites in soil
| dc.contributor.advisor | Duhan, Anil | |
| dc.contributor.author | Priyanka | |
| dc.date.accessioned | 2024-04-26T11:08:47Z | |
| dc.date.available | 2024-04-26T11:08:47Z | |
| dc.date.issued | 2023-01 | |
| dc.description.abstract | Persistence, mitigation and leaching potential of atrazine and its metabolites in sandy and clay loam soils was studied. Soil samples were collected periodically for dissipation and mitigation studies. Leaching experiment was performed at 50 μg (single dose) and 100 μg (double dose) in both soils taken in plexi glass columns. Enzymatic activities were studied as per the explained method in available literature. Sample preparation techniques i.e. Matrix solid phase dispersion (MSPD), was optimized using different solvents for both soils at fortification level of 0.001 μg/g for sample preparation. The limits of detection and quantification were ranged 0.0005-0.001 and 0.001-0.005μg/g, respectively for AT and metabolites. In clay loam and sandy loam soil, average recoveries of atrazine and metabolites ranged from 81.3-83.1% and 84.2-86.3%, respectively in methanol. Dissipation followed first-order kinetics. The residues reached below detectable limit after 30 and 60 days in sandy loam and clay loam soils, respectively. Presence of organic manures stimulated while BGC inhibited the dissipation of atrazine in both soils. Urease activity decreased up to 30 days and boosted thereafter up to 60 days in all treatments of clay loam soil. AT exhibited deleterious effect on urease activity up to 30 DAT followed by DEA and DIA in clay loam soil. AT and DEA stimulated while DIA inhibited DHG activity on 0 DAT in comparison to control. The residues of atrazine and its metabolites found in leachate fractions suggested about its highly mobile nature, and possible threat of surface and ground water contamination. The presence of a notable collection of residues in leachate fractions suggests the potential for surface and groundwater contamination. DEA and DIA metabolites, in particular, caused springtail Folsomia candida and earthworm Eisenia fetida to have longer and more unacceptable risks. If residues similar to those found in leachate fractions reach water bodies, they may be toxic to a variety of freshwater fish, aquatic arthropods, amphibians, and aquatic invertebrates. Future research should take a more comprehensive approach to assessing ecological health and potential threats to non-target species. | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810208407 | |
| dc.language.iso | English | |
| dc.pages | 141 + x | |
| dc.publisher | CCSHAU, Hisar | |
| dc.sub | Chemistry | |
| dc.theme | Persistence, mitigation and leaching of atrazine and its metabolites in soil | |
| dc.these.type | Ph.D | |
| dc.title | Persistence, mitigation and leaching of atrazine and its metabolites in soil | |
| dc.type | Thesis |