Sorption desorption behaviour of Imidacloprid in agricultural soils of Deccan plateau of Southern India: kinetics and thermodynamic analysis

Soil sorption has a significant impact on the fate and behaviour of agrochemicals in soil and water. The current study attempts to investigate the sorption desorption behaviour of Imidacloprid, a neonicotinoid insecticide, in three different types of black cotton soils (BC-1, BC-2, BC-3) and red soi...

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Bibliographic Details
Published in:International journal of environmental analytical chemistry 2024-12, Vol.104 (20), p.8570-8584
Main Authors: Majee, Prasanta, Reddy, P Hari Prasad
Format: Article
Language:English
Subjects:
Adsorption
Agricultural land
Agrochemicals
Cation exchange
Cation exchanging
Cations
Cotton
Desorption
Enthalpy
Exchange capacity
Groundwater
Hydrogen bonding
Imidacloprid
Impact analysis
Insecticides
Kinetics
Organic carbon
Organic soils
Soil
Soil analysis
Soil investigations
Soil pollution
Soil temperature
Soil water
Soils
Sorption
sorption-desorption
Temperature effects
thermodynamics
Water resources
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Summary:Soil sorption has a significant impact on the fate and behaviour of agrochemicals in soil and water. The current study attempts to investigate the sorption desorption behaviour of Imidacloprid, a neonicotinoid insecticide, in three different types of black cotton soils (BC-1, BC-2, BC-3) and red soil (RS) of Southern India using batch equilibrium technique under two different temperature conditions (273/300K). The data revealed that the Freundlich model provided the best explanation for the observed adsorption isotherms. BC-2 soil had higher adsorption coefficient (K f ) value, followed by BC-3, BC-1, and RS. Clay content, cation exchange capacity (CEC) and specific surface area (SSA) all had a positive correlation with K f value, indicating that they are responsible for Imidacloprid adsorption in the soil. The change in enthalpy (ΔH°) value was found to be negative in all of the investigated soils, indicating that the sorption process was spontaneous and exothermic, and that hydrogen bonding may be responsible for sorption. The low value of K f and organic carbon partition coefficient (K oc ) indicates that Imidacloprid is mobile in black cotton and red soils and has potential to contaminate groundwater resources.
ISSN:0306-7319
1029-0397
DOI:10.1080/03067319.2023.2206964