Bentonite clay-modified coconut biochar for effective removal of fluoride: kinetic, isotherm studies

Sudan, Shubam; Kaushal, Jyotsna; Khajuria, Ajay; Goyal, Himanshu; Mantri, Archana

doi:10.1007/s10450-024-00445-y

Adsorption

2024

DOI: 10.1007/s10450-024-00445-y

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Bentonite clay-modified coconut biochar for effective removal of fluoride: kinetic, isotherm studies

Shubam Sudan,

Jyotsna Kaushal,

Ajay Khajuria

et al.

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Cited by 5 publications

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Synthesis of Na-Alginate templated Montmorillonite-Silica Composite as adsorbent for removal of Rhodamine B

Deveci

2024

Adsorption

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In this study, mesoporous Montmorillonite-Silica composites prepared by using different amount Alginate as sacrificial template, for removal of Rhodamine B is investigated. By alternating Alginate amount it is aimed to switch the porosity of adsorbents thus the adsorption capacities of adsorbents. Synthesized adsorbents had been characterized by using Scanning Electron Microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and N2-Ads/Des techniques. It is observed that beside the decrease in the micropore volume, the total pore volume of the adsorbents increased with the increasing of used Alginate amount. The total pore volumes of adsorbents synthesized with different Clay/Alginate ratio (10, 5, 1) were found as 0.116, 0.172, and 0.178 cm3/g, respectively. Batch adsorption studies showed that the maximum removal efficiencies were obtained at acidic conditions and the adsorbents had better fit with Freundlich isotherm. Qm values obtained from Langmuir isotherm were found as 24.47, 31.97 and 28.48 mg/g for synthesized adsorbents. Also, adsorption kinetic studies showed that for all adsorbents, experimental data had good fit to the pseudo-second order kinetics model. The model parameters were found as 5.9,6.3 and 6.5 (10–3 g/ (mg min). Thermodynamic parameters were also investigated in the study. Negative ∆Go values pointed out that the adsorption of RhB onto synthesized adsorbents was favorable process. Positive values of ∆Ho and ΔS indicated that the adsorption of RhB on adsorbents were endothermic and rising of randomness during the adsorption of RhB on the surface of the adsorbent. Adsorbents could be recovered at least five times without significant decrease in adsorption capacity.

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Synthesis of Na-Alginate templated Montmorillonite-Silica Composite as adsorbent for removal of Rhodamine B

Deveci

2024

Adsorption

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Brazilian clays as natural cation exchangers for copper sorption in a batch system

Ferreira,

da Costa,

Barbosa

et al. 2024

Adsorption

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Comprehensive batch studies on removal of fluoride from aqueous solution by acid and alkali-activated adsorbents prepared from Dal lake weeds: Mechanism, Kinetics and Thermodynamics

Dar,

Kurella

2024

Environmental Research

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Bentonite clay-modified coconut biochar for effective removal of fluoride: kinetic, isotherm studies

Cited by 5 publications

References 38 publications

Synthesis of Na-Alginate templated Montmorillonite-Silica Composite as adsorbent for removal of Rhodamine B

Synthesis of Na-Alginate templated Montmorillonite-Silica Composite as adsorbent for removal of Rhodamine B

Brazilian clays as natural cation exchangers for copper sorption in a batch system

Comprehensive batch studies on removal of fluoride from aqueous solution by acid and alkali-activated adsorbents prepared from Dal lake weeds: Mechanism, Kinetics and Thermodynamics

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