Adsorption isotherm models and error analysis for single and binary adsorption of Cd(II) and Zn(II) using leonardite as adsorbent

Terdputtakun, Apiradee; Arqueropanyo, Orn-anong; Sooksamiti, Ponlayuth; Janhom, Sorapong; Naksata, Wimol

doi:10.1007/s12665-017-7110-y

Cited by 58 publications

(25 citation statements)

References 58 publications

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“…for the individual components signifying that the process was showing synergistic effect. This can be due to the properties of the solutes like ionic size, reduction potential, molecular polarity, molecular weight, and the properties of the adsorbent such as surface properties, structure and functional groups [16], [45], and [46]. The same trend was observed with respect to total percent removal of the combined system and the total percent removal of the individual system.…”

Section: The Interaction Effect Of the Pollutants In The Solution (Simentioning

confidence: 57%

“…The basic principle used to study the interaction mechanism is by comparing the adsorption capacity of the component (c) Non interaction effect: The adsorption capacity of a component is not influenced by the presence of the other component(q i,m = q i,s ). [14][15][16][17] 3. Materials and methods…”

Section: Interaction Effects Between the Pollutants In The Solutionmentioning

confidence: 99%

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Simultaneous adsorption of phenol and nickel from wastewater using tea fiber waste

Karania

Singh

Girish

2018

IJET

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The present work explores the potential of tea fibre waste as an adsorbent to remove phenol and nickel from wastewater in both single and binary component mode. The properties of the tea fibre such as surface area, pore volume and particle size were improved by treating with hydrochloric acid. The isotherm models were verified for single component system to find the adsorption mechanism. The equilibrium data were obeying Freundlich model. The simultaneous adsorption of two pollutants were carried out in order to evaluate the interaction mechanism such as synergic, antagonistic or non-interaction effect. It was observed that overall the system was exhibiting synergistic type of behavior.

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Section: The Interaction Effect Of the Pollutants In The Solution (Simentioning

confidence: 57%

Section: Interaction Effects Between the Pollutants In The Solutionmentioning

confidence: 99%

Simultaneous adsorption of phenol and nickel from wastewater using tea fiber waste

Karania

Singh

Girish

2018

IJET

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“…To mathematically support the putative underlying adsorption-based mechanism, we utilized the extended Langmuir isotherm model based on each molecular species’ magnitude of adsorption [ 56 ]. This model can be used to predict the competitive adsorption of multiple species onto a single substrate, and has been used to model adsorption of acidic dyes on activated carbon [ 57 , 58 , 59 ]. The pair of equations is given as

where θ is the ratio of adsorbed ions and available binding sites, C is the concentration of ions in the pores, and K eq is the Langmuir constant.…”

Section: Resultsmentioning

confidence: 99%

Chemically-Gated and Sustained Molecular Transport through Nanoporous Gold Thin Films in Biofouling Conditions

2021

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Sustained release and replenishment of the drug depot are essential for the long-term functionality of implantable drug-delivery devices. This study demonstrates the use nanoporous gold (np-Au) thin films for in-plane transport of fluorescein (a small-molecule drug surrogate) over large (mm-scale) distances from a distal reservoir to the site of delivery, thereby establishing a constant flux of molecular release. In the absence of halides, the fluorescein transport is negligible due to a strong non-specific interaction of fluorescein with the pore walls. However, in the presence of physiologically relevant concentration of ions, halides preferentially adsorb onto the gold surface, minimizing the fluorescein–gold interactions and thus enabling in-plane fluorescein transport. In addition, the nanoporous film serves as an intrinsic size-exclusion matrix and allows for sustained release in biofouling conditions (dilute serum). The molecular release is reproducibly controlled by gating it in response to the presence of halides at the reservoir (source) and the release site (sink) without external triggers (e.g., electrical and mechanical).

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“…adsorption isotherms, suitable model for the design process, fitting isotherm data accurately into different isotherm models was applied using published techniques [28,29]. The batch experiments results were subjected to Langmuir [30], Freundlich isotherms [31], and Dubinin-Kaganer-Radushkevich model [32] to study the adsorption mechanisms and efficiencies of the adsorbent.…”

Section: Adsorption Isotherms For Determination Ofmentioning

confidence: 99%

Chemical analysis of corn cob-based biochar and its role as water decontaminants

Assirey

Altamimi

2021

Journal of Taibah University for Science

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Production of biochar is accomplished by pyrolysis of corncobs at 350°C (BC-350) and 450°C (BC-450) under oxygen-limited conditions. The chemical and physical properties were investigated via XRD, FTIR, BET, SEM and EDX analysis. Batch experiments were conducted for the adsorption of Pb 2+ ions from aqueous solution onto biochar with regards to pH, contact time, biochar dose and initial Pb 2+ concentration. The adsorption efficiency of Pb 2+ was increased as increasing pH and biochar dose up to 1.5 g/L. Kinetic and isothermal studies demonstrated that the experimental data were fitted with the pseudo-second-order model, Langmuir and Freundlich isotherms. The study emphasized the preferable pyrolysis temperature which is 450°C. According to the Dubinin-Kaganer-Radushkevich (DKR) model, the adsorption process of Pb 2+ was a chemical and endothermic reaction. Results showed the applicability of corncob based biochar to be used as an efficient and low cost adsorbent for Pb 2+ ions removal.

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Adsorption isotherm models and error analysis for single and binary adsorption of Cd(II) and Zn(II) using leonardite as adsorbent

Cited by 58 publications

References 58 publications

Simultaneous adsorption of phenol and nickel from wastewater using tea fiber waste

Simultaneous adsorption of phenol and nickel from wastewater using tea fiber waste

Chemically-Gated and Sustained Molecular Transport through Nanoporous Gold Thin Films in Biofouling Conditions

Chemical analysis of corn cob-based biochar and its role as water decontaminants

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