Single-component and competitive adsorption of tetracycline and Zn(<scp>ii</scp>) on an NH<sub>4</sub>Cl-induced magnetic ultra-fine buckwheat peel powder biochar from water: studies on the kinetics, isotherms, and mechanism

Ai, Tian; Jiang, Xiaojun; Liu, Qingyu; Lv, Linlin; Dai, Shujuan

doi:10.1039/d0ra02346a

Cited by 25 publications

(5 citation statements)

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“…The horizontal error bars in panels (d) and (e) represent the size of the bins used for grouping data, while the vertical error bars indicate the standard deviation calculated between the 14 unique data sets. The data sets listed are in order: (1) Yang et al, (2) Yang and Al-Duri, (3 and 4) Liu and Shen, (5) Zhu et al, (6) Yang et al, (7) Yang et al, (8) Mohamed et al, (9) Drenkova-tuhtan et al, (10) Liu et al, (11) Örnek et al, (12) Zhan et al, (13) Ai et al, and (14) Nadiye-tabbiruka and Sejie…”

Section: Resultsmentioning

confidence: 99%

A Revised Pseudo-Second-Order Kinetic Model for Adsorption, Sensitive to Changes in Adsorbate and Adsorbent Concentrations

et al. 2021

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The development of new adsorbent materials for the removal of toxic contaminants from drinking water is crucial to achieving the United Nations Sustainable Development Goal 6 (clean water and sanitation). The characterisation of these materials includes fitting models of adsorption kinetics to experimental data, most commonly the pseudo-second order (PSO) model. The PSO model, however, provides no sensitivity to changes in experimental conditions such as adsorbate and adsorbent concentrations (C 0 and C s ) and consequently is not able to predict changes in performance as a function of operating conditions. Furthermore, the experimental conditionality of the PSO rate constant, k 2 , can lead to erroneous conclusions when comparing literature results. In this study, we analyse 108 kinetic experiments from 47 literature sources to develop a relatively simple modification of the PSO rate equation, yielding:Unlike the original PSO model, this revised rate equation (rPSO) demonstrates the first-order and zero-order dependencies upon C 0 and C s that we observe empirically. Our new model reduces the residual sum of squares by 66% when using a single rate constant to model multiple adsorption experiments with varying initial conditions. Furthermore, we highlight how the rPSO rate constant k' is more appropriate for literature comparison, highlighting faster kinetics in the adsorption of arsenic onto alumina versus iron oxides. This revised rate equation should find applications in engineering studies, especially since unlike the PSO rate constant k 2 , the rPSO rate constant k' does not show a counter-intuitive inverse relationship with the increasing reaction rate when C 0 is increased.

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Section: Resultsmentioning

confidence: 99%

A Revised Pseudo-Second-Order Kinetic Model for Adsorption, Sensitive to Changes in Adsorbate and Adsorbent Concentrations

et al. 2021

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“…k 1 is much larger than k 2 , indicating that the initial phase rate is greater than the second phase. Therefore, the adsorption of TCH on MS 1 -CN is realized by surface adsorption and intra-particle diffusion, and stage II is the main step to limit the rate. , …”

Section: Resultsmentioning

confidence: 99%

Chemical Vapor Deposition Growth of MoS₂ on g-C₃N₄ Nanosheets for Efficient Removal of Tetracycline Hydrochloride

et al. 2022

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MoS 2 was vertically grown on g-C 3 N 4 nanosheets by chemical vapor deposition to prepare nanocomposites named MS-CN samples. Because of a large-surface area of 545.2 m 2 •g −1 and a total pore volume of 1.7 cm 3 •g −1 , the sample MS-CN revealed fast and large adsorption capacity for tetracycline hydrochloride (TCH). The adsorption kinetics model proved that TCH could be rapidly adsorbed within 5 min, and chemical adsorption was dominant. For singlecomponent adsorption of TCH, the maximum adsorption capacity was ∼154 mg/g. The monolayer adsorption was carried out on the surface of MS-CN. Both of the film and intra-particle diffusion were considered as significant processes to facilitate adsorption. Thermodynamic parameters indicate that the adsorption of TCH is a spontaneous endothermic process. The adsorption of TCH was highly pH-dependent. The maximum adsorption capacity of TCH was obtained in the case of pH ∼ 7. After four adsorption and desorption cycles, MS-CN still maintained well-adsorption performance. Multiple adsorption mechanism, pore filling, electrostatic force, π−π conjugation, and hydrogen bonding interactions were studied. Because of fast adsorption, large adsorption capacity, and high stability, it is a promising adsorbent for antibiotics.

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“…The tests were conducted repeatedly in batches, with each batch repeated at least three times and the average of the results was computed. The adsorption amount q e (mg g −1 ) and adsorption efficiency R (%) of fluoride ions were calculated using eqn (1) 27 and (2) 28 respectively: where C 0 (mg L −1 ) represents the initial concentration of the solution, C e (mg L −1 ) refers to the concentration of the solution in the equilibrium stage of adsorption, V (L) represents the volume of the solution, and m (mg) represents the mass of the adsorbent.…”

Section: Methodsmentioning

confidence: 99%

Portable hydroxyl-functionalized coal gangue-based cordierite porous ceramics sheets for effective adsorption of fluorine-containing wastewater

Wang,

Guo,

Qiao

et al. 2024

RSC Adv.

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Single-component and competitive adsorption of tetracycline and Zn(ii) on an NH₄Cl-induced magnetic ultra-fine buckwheat peel powder biochar from water: studies on the kinetics, isotherms, and mechanism

Abstract: Single-component and competitive adsorption of tetracycline (TC) and Zn(ii) on an NH4Cl-induced magnetic ultra-fine buckwheat peel powder biochar (NH4Cl-BHP-char/Fe3O4) was investigated in batch experiments.

Cited by 25 publications

References 50 publications

A Revised Pseudo-Second-Order Kinetic Model for Adsorption, Sensitive to Changes in Adsorbate and Adsorbent Concentrations

A Revised Pseudo-Second-Order Kinetic Model for Adsorption, Sensitive to Changes in Adsorbate and Adsorbent Concentrations

Chemical Vapor Deposition Growth of MoS₂ on g-C₃N₄ Nanosheets for Efficient Removal of Tetracycline Hydrochloride

Portable hydroxyl-functionalized coal gangue-based cordierite porous ceramics sheets for effective adsorption of fluorine-containing wastewater

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Single-component and competitive adsorption of tetracycline and Zn(ii) on an NH4Cl-induced magnetic ultra-fine buckwheat peel powder biochar from water: studies on the kinetics, isotherms, and mechanism

Abstract: Single-component and competitive adsorption of tetracycline (TC) and Zn(ii) on an NH4Cl-induced magnetic ultra-fine buckwheat peel powder biochar (NH4Cl-BHP-char/Fe3O4) was investigated in batch experiments.

Cited by 25 publications

References 50 publications

A Revised Pseudo-Second-Order Kinetic Model for Adsorption, Sensitive to Changes in Adsorbate and Adsorbent Concentrations

A Revised Pseudo-Second-Order Kinetic Model for Adsorption, Sensitive to Changes in Adsorbate and Adsorbent Concentrations

Chemical Vapor Deposition Growth of MoS2 on g-C3N4 Nanosheets for Efficient Removal of Tetracycline Hydrochloride

Portable hydroxyl-functionalized coal gangue-based cordierite porous ceramics sheets for effective adsorption of fluorine-containing wastewater

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Product

Resources

About

Single-component and competitive adsorption of tetracycline and Zn(ii) on an NH₄Cl-induced magnetic ultra-fine buckwheat peel powder biochar from water: studies on the kinetics, isotherms, and mechanism

Chemical Vapor Deposition Growth of MoS₂ on g-C₃N₄ Nanosheets for Efficient Removal of Tetracycline Hydrochloride