Structural effects of organobentonites on controlled release of pretilachlor

Mo, Junyong; Dai, Lintao; Chen, Libiao; Wang, Yajing; Huang, Aimin; Wang, Lisheng; Ma, Lin

doi:10.1016/j.clay.2015.07.036

Cited by 7 publications

(3 citation statements)

References 46 publications

(68 reference statements)

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“…The results indicated that the time taken for 50% of active ingredients to be released from organobentonites with surfactant loading level from 0.6 to 1.2 times the cation exchange capacity (CEC) increased with increasing adsorption coefficient by the Freundlich equation and is seemed to be related to the interlayer spacing and packing density of the surfactant in the interlayer. Unfortunately, the mechanism of structural effects of organobentonites on pretilachlor release remained unclear due to the lack of the physical significance of adsorption coefficient by the Freundlich equation and a suitable method to evaluate the permeability of the matrix …”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, the mechanism of structural effects of organobentonites on pretilachlor release remained unclear due to the lack of the physical significance of adsorption coefficient by the Freundlich equation and a suitable method to evaluate the permeability of the matrix. 20 To get a further insight into the release properties of organobentonites, equilibrium adsorption of pretilachlor onto organobentonites with HTMA loading level from 0.4 to 1.5 × CEC was investigated. The adsorption thermodynamic parameters were used to reveal the interaction between the matrix and the herbicide.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamics and Kinetics of Pretilachlor Adsorption on Organobentonites for Controlled Release

Lou

et al. 2020

ACS Omega

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Thermodynamics and kinetics of pretilachlor adsorption on organobentonites modified with hexadecyltrimethyl ammonium chloride were investigated to reveal the structural effects of organobentonites on the interaction with pretilachlor and the diffusion of the herbicide and were related to the controlled release from organobentonites. The adsorption of pretilachlor was entropically driven by hydrophobic interaction. The entropy change dropped with increasing surfactant loading from 0.4 to 1.50 times the cation exchange capacity (CEC) of the bentonite used, corresponding to a decrease in the degree of freedom of pretilachlor molecules due to the enhanced order of surfactant in the interlayer. The kinetics of pretilachlor adsorption was well fitted to the pseudo-second-order model and related to the structural features of organobentonites. The enhanced packing density of the surfactant in the interlayer generally resulted in a reduction of the rate constant of the pretilachlor adsorption onto organobentonites. However, the stepwise increase in the basal spacing due to the surfactant arrangement transition, from lateral-monolayer to lateral-bilayer at a loading level of more than 0.8 × CEC, benefited the diffusion of pretilachlor and diminished the influence of the increase in surfactant packing density. The release of pretilachlor from organobentonites was predominated by Fickian diffusion, which could be understood from the adsorption thermodynamics and kinetics. The time taken for the release of 50% of active ingredient was 16–23 times that for the control formulation and exhibited a linear increase with the relative value of the equilibrium constant to the rate constant of pretilachlor adsorption.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermodynamics and Kinetics of Pretilachlor Adsorption on Organobentonites for Controlled Release

Lou

et al. 2020

ACS Omega

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“…Clay minerals are abundant, are low cost, and have potential adsorbent properties for controlled release formulations. Mo et al (2015) reported controlled release behavior of pretilachlor with organobentonites modified with dodecyltrimethylammonium chloride (DTMA) and hexadecyltrimethylammonium chloride (HTMA), which showed improved incorporation and slower release of herbicide. The release process was governed by the adsorption capability, permeability, and structural features of organobentonites.…”

Section: Nanoformulationsmentioning

confidence: 99%

Ultimate fate, transformation, and toxicological consequences of herbicide pretilachlor to biotic components and associated environment: An overview

Dhanda

Beniwal

Yadav

et al. 2023

J of Applied Toxicology

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Herbicides are applied for effective weed management in order to increase the crop yield. In recent decades, the overuse of these chemicals has posed adverse effects on different biotic components of the environment. Pretilachlor has been widely used during last few decades for weed management in paddy crop. Its excessive use may prove fatal for environment, various organisms, and nontarget plants. Thus, it is pertinent to know the extent to which herbicide residues remain in environment. The potential mobility and the release rate of herbicide in the soil are important factors governing ecotoxicological impact and degradation rate. Therefore, several techniques are being investigated for its effective removal from the contaminated sites. Furthermore, efforts have also been made to study the degradation of pretilachlor by various physicochemical processes, resulting into the formation of different types of metabolites. This review summarizes the available information on environmental fate, various degradation processes, microbial biotransformation, metabolites formed, ecotoxicological effects, techniques for detection in environmental samples, effect of safener, and various control release formulations for sustained release of pretilachlor in applied fields. The information so obtained will be very advantageous in deciding the future policies for safe and judicious use of the herbicide by maintaining health and environmental sustainability.

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Short-term toxicity of chloroacetanilide herbicide on non-target organism: estimation of median-lethal concentration, hematological, biochemical, ion regulation, and antioxidants

et al. 2022

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Structural effects of organobentonites on controlled release of pretilachlor

Cited by 7 publications

References 46 publications

Thermodynamics and Kinetics of Pretilachlor Adsorption on Organobentonites for Controlled Release

Thermodynamics and Kinetics of Pretilachlor Adsorption on Organobentonites for Controlled Release

Ultimate fate, transformation, and toxicological consequences of herbicide pretilachlor to biotic components and associated environment: An overview

Short-term toxicity of chloroacetanilide herbicide on non-target organism: estimation of median-lethal concentration, hematological, biochemical, ion regulation, and antioxidants

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