Thermodynamics and kinetics of pretilachlor adsorption: Implication to controlled release from organobentonites

Wu, Chou; Lou, Xianfen; Huang, Aimin; Zhang, Min; Ma, Lin

doi:10.1016/j.clay.2020.105566

Cited by 23 publications

(12 citation statements)

References 42 publications

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“…Moreover, the change in Gibbs free energy (Δ G ) was calculated from eqn (14) . 51 K c = C ad / C e Δ G = Δ H − T Δ S where C ad is the concentration of adsorbed CPF, C e is the equilibrium concentration of CPF, Δ H is the enthalpy change, Δ S is the entropy change, R is the universal gas constant and T is the absolute temperature.…”

Section: Methodsmentioning

confidence: 99%

“…Normally, physisorption is indicated by standard free energy change values (DG ) ranging from 0 to À20 kJ mol À1 , whereas that of chemisorption ranges from À80 to À400 kJ mol À1 . 51,77 The calculated values of DG (Table 1) conrm that the adsorption process takes place by physisorption. Therefore, the involvement of the imprinted active sites on the MMIP surface is highly acceptable which coincides with the calculated IF.…”

Section: Adsorption Thermodynamics and The Effect Of Temperaturementioning

confidence: 99%

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Matrix-dispersed magnetic molecularly-imprinted polyaniline for the effective removal of chlorpyrifos pesticide from contaminated water

2021

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Section: Methodsmentioning

confidence: 99%

Section: Adsorption Thermodynamics and The Effect Of Temperaturementioning

confidence: 99%

Matrix-dispersed magnetic molecularly-imprinted polyaniline for the effective removal of chlorpyrifos pesticide from contaminated water

2021

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“…Meanwhile, microencapsulation reduces the sedimentation or adsorption of a.i. in soil, 53 thereby improving pesticide efficiency.…”

Section: Resultsmentioning

confidence: 99%

Combination of modified biochar and polyurea microcapsules to co‐encapsulate a fumigant via interface polymerization for controlled release and enhanced bioactivity

Ren

Hao

Fang

et al. 2021

Pest Management Science

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BACKGROUND Soil fumigants—the most effective agrochemicals for managing soil‐borne diseases—have been used extensively. However, high volatility, moderate toxicity and insufficient effective duration considerably limit their application. In the present study, interface polymerization was used to combine modified biochar (BC) and polyurea microcapsules (MCs) to co‐encapsulate allyl isothiocyanate (AITC), developing a model fumigant for controlled release (AITC@BC‐MCs). RESULTS The physical characteristics of BC modified by sand‐milling were significantly improved. In addition, chemical properties and morphological features of AITC@BC‐MCs characterized by integrated methods revealed successful preparation of BC‐MCs. Compared with monolayer MCs, BC‐MCs could significantly delay AITC release owing to the composite obstruction effect. Moreover, modifying BC endowed the cargo molecules with a pH‐responsive release property. Additionally, this composite showed a longer persistent duration by prolonging AITC degradation half‐life, which was 3.2–3.5‐fold greater than that of the AITC technical concentrate under different soil conditions. Finally, the control efficacy of the AITC@BC‐MC against pathogens, including nematodes and fungi, as well as against weeds was significantly enhanced at the same dose, but the composite did not inhibit seed germination and growth after 10 days when fumigated soil was aerated. CONCLUSION Construction of a composite encapsulation system enhanced pesticide efficacy, reduced dose via controlled release and delayed fumigant degradation in soil, indicating the great potential of this strategy for developing an effective and environmentally friendly fumigant formulation. © 2021 Society of Chemical Industry

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“…The negative Δ G ° values at all temperatures showed that BB‐Y adsorption on MagMt was spontaneous [ 33 ] and lower temperature favors BB‐Y adsorption. Δ H ° values of <40 kJ mol ‒1 endorsed the physisorption and negative values of Δ H ° confirmed the exothermic nature of the adsorption system.…”

Section: Resultsmentioning

confidence: 99%

Adsorption of Diazo Dye from Aqueous Solutions by Magnetic Montmorillonite Composite

Akar

Ozdemir

Sayin

et al. 2020

CLEAN Soil Air Water

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Synthetic dyes have complex molecular structures and are stable molecules against oxidizing agents, sunlight, and microbial attack. Therefore, the treatment of dye‐containing wastewater using appropriate techniques is of great importance. Difficulties in separation and recovery of an adsorbent from the solution limit the large‐scale applications of the adsorption process. A magnetic separation technique can be adapted to the adsorption process to overcome these limitations. In this study, a natural mineral‐based magnetic adsorbent is prepared by a co‐precipitation method. Adsorption performance of magnetic montmorillonite (MagMt) is evaluated in both batch and continuous systems as a function of initial pH, contact time, adsorbent dosage, ionic strength, flow rate, and bed depth. MagMt is characterized through infrared (IR) spectroscopy, scanning electron microscopy (SEM), energy dispersive X‐ray analysis (EDX), vibrating sample magnetometer (VSM), X‐ray diffraction (XRD), and zeta potential measurement. Sorption yield of MagMt for Bismark Brown‐Y (BB‐Y) is found as maximum (98.60%) at pH 4 with 40 mg adsorbent. Fast sorption equilibrium is attained within 10 min and the sorption data follow the pseudo‐second‐order kinetic model and Langmuir isotherm model. The maximum monolayer sorption capacity of MagMt is 138.70 mg g‒1.

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Thermodynamics and kinetics of pretilachlor adsorption: Implication to controlled release from organobentonites

Cited by 23 publications

References 42 publications

Matrix-dispersed magnetic molecularly-imprinted polyaniline for the effective removal of chlorpyrifos pesticide from contaminated water

Matrix-dispersed magnetic molecularly-imprinted polyaniline for the effective removal of chlorpyrifos pesticide from contaminated water

Combination of modified biochar and polyurea microcapsules to co‐encapsulate a fumigant via interface polymerization for controlled release and enhanced bioactivity

Adsorption of Diazo Dye from Aqueous Solutions by Magnetic Montmorillonite Composite

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