Adsorption mechanism of dichlorvos onto coconut fibre biochar: the significant dependence of H-bonding and the pore-filling mechanism

Binh, Quach An; Kajitvichyanukul, Puangrat

doi:10.2166/wst.2018.529

Cited by 46 publications

(9 citation statements)

References 23 publications

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“…The FTIR results proposed the presence of bismuth and the presence of ‐OH, CO, CH, and CO groups in the biochar matrix. The available literature indicated that oxygen‐containing functionality was of significance in the adsorption of aromatic pollutants (e.g., phenol and dyes) through the formation of hydrogen bonding and π‐π interactions 71,72 …”

Section: Resultsmentioning

confidence: 99%

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Adsorption of methylene blue by bismuth impregnated biochar of different biomass materials: pore structure and surface chemistry characteristics

et al. 2022

J of Chemical Tech & Biotech

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In this study, three different types of biochar (biomass materials were beech wood, corncob, and bamboo) were loaded with bismuth to form bismuth impregnated biochars (named respectively as Bi@WBC, Bi@CBC, and Bi@BBC) to investigate their properties (pore structure and surface chemistry characteristics) on methylene blue (MB) removal capacities. Three bismuth impregnated biochars made from different biomass materials were ranked for their adsorption capacity of MB as follows: Bi@WBC > Bi@CBC > Bi@BBC, in which Bi@WBC showed the largest Langmuir adsorption capacity of 178.59 mg g −1 . While the specific surface area (SSA) and pore volume of Bi@WBC were the largest (accounting for 477.74 m 2 g −1 and 0.15 cm 3 g −1 , respectively), according to the FTIR and XPS results, Bi@WBC (72.3%) exhibited a higher proportion of Bi O bonds than the Bi@CBC (52.3%) and Bi@BBC (48.4%) did. Conclusively, the rich porous structure and surface functional groups of Bi@WBC affected the adsorption capacity of MB, and the chemical adsorption provided the main contribution.

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Section: Resultsmentioning

confidence: 99%

“…The available literature indicated that oxygen-containing functionality was of significance in the adsorption of aromatic pollutants (e.g., phenol and dyes) through the formation of hydrogen bonding and π-π interactions. 71,72…”

Section: Surface Chemistry Of Bibc Xrd Investigationmentioning

confidence: 99%

Adsorption of methylene blue by bismuth impregnated biochar of different biomass materials: pore structure and surface chemistry characteristics

et al. 2022

J of Chemical Tech & Biotech

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“…For example, the adsorption of diazinon on surfaces diverse as acid-activated bentonite 64 , surfactant-modified montmorillonites 65 , a magnetic composite of clay/graphene oxide/Fe 3 O 4 66 , and NH 4 Cl-induced activated carbon 67 , all proceed as pseudo second-order processes. Similarly, the adsorption of dichlorvos on coconut fibre biochar 68 , on soil surfaces 69 and on polyethyleneimine-modified fibres 70 are all second-order processes. The data in Table 3 show that both diazinon and dichlorvos are adsorbed at comparable rates on CDA and starch, the ratio of the second-order rate constant for the adsorption of dichlorvos, , and diazinon, , i.e., being merely 0.8 and 1.6 for CDA and starch, respectively.…”

Section: Resultsmentioning

confidence: 99%

Comparative adsorptive behaviour of cow dung ash and starch as potential eco-friendly matrices for controlled organophosphorus pesticides delivery

Okafor

Onyido

2022

Sci Rep

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The work reported herein explores the viability of cow dung ash (CDA) as a matrix for controlled pesticide delivery, by comparing its adsorptive characteristics towards two organophosphorus pesticides with those of starch, conventionally utilized in designing controlled pesticide delivery systems. CDA was characterized by Fourier transform infrared (FTIR) spectroscopy and powder X-ray diffraction (PXRD). Data for pesticide adsorption on the surfaces correlate well with Langmuir and Freundlich isotherms, with the former isotherm giving a slightly better fit (R2 ≥ 0.90) than the latter (R2 ≥ 0.81). Values of the adsorption parameters KL and RL indicate favourable pesticide adsorption on both surfaces. Desorption is the microscopic reverse of adsorption; both processes obey pseudo-second-order kinetics. The implication of this kinetic form is a mechanism in which adsorbate diffusion to the polymer surface and its transport into the polymer interior are important events. The isothermal and kinetic ratios, $$\frac{{K_{L}^{CDA} }}{{K_{L}^{Starch} }} = 3.8$$ K L CDA K L Starch = 3.8 and 4.0, $$\frac{{k_{2}^{CDA} }}{{k_{2}^{Starch} }} = 1.3$$ k 2 CDA k 2 Starch = 1.3 and 0.6, and $$\frac{{k_{ - 2}^{CDA} }}{{k_{ - 2}^{Starch} }} = 5.2$$ k - 2 CDA k - 2 Starch = 5.2 and 1.0 at pH 7.0 and 27 °C, compare the adsorptive behaviour of diazinon and dichlorvos, respectively, on CDA and starch. These parameters are of the same order of magnitude, signalling that CDA is as potentially viable as starch for use as a matrix for pesticide-controlled delivery.

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“…For example, the adsorption of diazinon on surfaces as diverse as acid-activated bentonite 60 , surfactant-modified montmorillonites, 61 a magnetic composite of clay/graphene oxide/Fe3O4, 62 and NH4Clinduced activated carbon 63 all proceed as second-order processes. Similarly, the adsorption of dichlorvos on coconut fibre biochar, 64 on soil surfaces 65 and on polyethyleneimine-modified fibres 66 are all second-order processes. The data in Table 3 show that both diazinon and dichlorvos are adsorbed at comparable rates on CDA and starch, the ratio of the second-order rate constant for the adsorption of dichlorvos, 𝑘 2 𝑑𝑖𝑐ℎ𝑙 , and diazinon, 2) for the adsorption of these pesticides on both surfaces, it then appears that these two surfaces, CDA and starch, do not differ substantially in their thermodynamic and kinetic responses towards these adsorbents.…”

Section: Kinetics Of the Adsorption Of Diazinon And Dichlorvos On Cda And Starch Surfacesmentioning

confidence: 99%

Towards Viable Eco-friendly Matrices for Controlled Pesticide Delivery: Adsorptive Behaviour of Cow Dung Ash and Starch Towards Organophosphorus Pesticides

2022

Preprint

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The work reported herein explores the viability of cow dung as a matrix for controlled pesticide delivery, by comparing its adsorptive characteristics towards two organophosphorus pesticides with those of starch, conventionally utilized in designing controlled pesticide delivery systems. Characterization of cow dung ash (CDA) was by Fourier transform infrared (FTIR) spectroscopy and powder X-ray diffraction (PXRD). Pesticide adsorption data on the surfaces correlate well with Langmuir and Freundlich isotherms, with the former isotherm giving a slightly better fit (R2 $\ge$ 0.90) than the latter (R2 $\ge$ 0.81). Values of the adsorption parameters KL and RL indicate favourable pesticide adsorption on both surfaces. Desorption is the microscopic reverse of adsorption; both processes obey pseudo-second-order kinetics, implicating a mechanism in which adsorbate diffusion to the polymer surface and its transport into the polymer interior are important events. The isothermal and kinetic ratios $\frac{{K}_{L}^{CDA}}{{K}_{L}^{Starch}}$= 3.8 and 4.0, $\frac{{k}_{2}^{CDA}}{{k}_{2}^{Starch} }$ = 1.3 and 0.6, and $\frac{{k}_{-2}^{CDA}}{{k}_{-2}^{Starch}}$ = 5.2 and 1.0 at pH 7 and 27oC, compare the adsorptive behaviour of diazinon and dichlorvos, respectively, on CDA and starch. These parameters are of the same order of magnitude, signalling that CDA is as potentially viable as starch for use as a matrix for pesticide-controlled delivery.

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Adsorption mechanism of dichlorvos onto coconut fibre biochar: the significant dependence of H-bonding and the pore-filling mechanism

Cited by 46 publications

References 23 publications

Adsorption of methylene blue by bismuth impregnated biochar of different biomass materials: pore structure and surface chemistry characteristics

Adsorption of methylene blue by bismuth impregnated biochar of different biomass materials: pore structure and surface chemistry characteristics

Comparative adsorptive behaviour of cow dung ash and starch as potential eco-friendly matrices for controlled organophosphorus pesticides delivery

Towards Viable Eco-friendly Matrices for Controlled Pesticide Delivery: Adsorptive Behaviour of Cow Dung Ash and Starch Towards Organophosphorus Pesticides

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