NDLI: Adsorption–desorption of tricyclazole: effect of soil types and organic matter

Content Provider	Springer Nature Link
Author	Kumar, Naveen Mukherjee, Irani Varghese, Eldho
Copyright Year	2015
Abstract	Adsorption–desorption of tricyclazole was studied by batch equilibrium method in two soil types, varying in their physical and chemical properties. The adsorption of tricyclazole on the soil matrix exhibited low rate of accumulation with 18.24 ± 0.14 % in Ultisol and moderately high rate with 43.62 ± 0.14 % in Vertisol after 6 h of equilibrium time. For soils amended with farmyard manure (FYM), the adsorption percentage increased to 32.52 ± 0.14 % in Ultisol and 55.14 ± 0.14 % in Vertisol. The Freundlich model was used to describe the adsorption–desorption of the tricyclazole in two soils. The adsorption isotherm suggested a relatively higher affinity of tricyclazole to the adsorption sites at low equilibrium concentrations. Variation in sorption affinities of the soils as indicated by the distribution coefficient (K d) for sorption in the range of 0.78 ± 0.01–1.38 ± 0.03, 1.71 ± 0.03–2.99 ± 0.09, 2.75 ± 0.05–4.69 ± 0.01, and 4.65 ± 0.08–7.64 ± 0.01 mL/g for Ultisol, FYM-amended Ultisol, Vertisol, and FYM-amended Vertisol, respectively. Desorption was slower than adsorption, indicating a hysteresis effect. The hysteresis coefficient varied from 0.023 ± 0.15 to 0.160 ± 0.12 in two test soils. A good fit to the linear and Freundlich isotherms was observed with correlation coefficients >0.96. The results revealed that adsorption–desorption was influenced by soil properties and showed that the maximum sorption and minimum desorption of pesticide were observed in soils with higher organic carbon and clay content. Thus, groundwater contamination may be minimized, on application of tricyclazole in high-sorption soils of rice-growing regions.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF
ISSN	01676369
Journal	Environmental Monitoring and Assessment
Volume Number	187
Issue Number	3
e-ISSN	15732959
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-02-03
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Tricyclazole Adsorption Desorption Soil types Ultisol Vertisol Freundlich isotherm Environmental Monitoring/Analysis Environmental Management Ecotoxicology Atmospheric Protection/Air Quality Control/Air Pollution Ecology
Content Type	Text
Resource Type	Article
Subject	Pollution Medicine Management, Monitoring, Policy and Law

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