Insight into the adsorption kinetics models for the removal of contaminants from aqueous solutions

Tan, K.L.; Hameed, B.H.

doi:10.1016/j.jtice.2017.01.024

Cited by 945 publications

(487 citation statements)

References 240 publications

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“…Migration of dye molecules toward the boundary layer and their sluggish diffusion through the film layer of the nanoadsorbent may be an ascription for this phenomenon . The consistent reduction in the availability of vacant sites, functional group sites, and concentration gradient on the adsorbent surface over time is another reason for this trend . The results were found to be consistent with the results obtained by Mir et al who performed the sorptive removal of an anionic dye direct yellow 12 onto Fe 2 O 3 –gelatin nanocomplex.…”

Section: Resultssupporting

confidence: 87%

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Biogenic fabrication of iron nanoadsorbents from mixed waste biomass for aqueous phase removal of alizarin red S and tartrazine: Kinetics, isotherm, and thermodynamic investigation

Gautam

Shivapriya

Banerjee

et al. 2019

Env Prog and Sustain Energy

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Present work deals with the facile and ecologically viable production of iron nanoadsorbents by utilizing different waste plant biomass, orange peel, flower waste, and environmentally harmful Alligator weed. The as‐prepared nanoadsorbents were applied for the aqueous phase minimization of toxic dyes, alizarin red S and tartrazine. Different techniques, namely, X‐ray diffraction, Fourier transform infra‐red spectroscopy, scanning electron microscopy, dynamic light scattering and magnetic properties measurement system, were applied to characterize the synthesized material. Impact of various experimental conditions like pH, adsorbent dose, contact time, and temperature on removal trend was examined. The acidic medium positively favored the process of sorption. Kinetic analysis revealed that the adsorption of both the dyes followed pseudo‐second‐order kinetic model. Equilibrium sorption data were fitted better to Freundlich model as compared with Langmuir model. The maximum adsorption capacities at 50°C were 42.58 and 68.78 mg g–1 for alizarin red S and tartrazine at pH 4.0 and 2.0, respectively. Thermodynamic parameters exhibited that the sorption of both the dyes onto nanoadsorbent was spontaneous and endothermic with increased randomness at the solid–liquid interface. Desorption experiment demonstrated that the regenerated adsorbent can be recycled efficiently up to three times. Overall, the prepared nanomaterials exhibit remarkable removal competency for both dyes tested like alizarin red S and tartrazine.

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Section: Resultssupporting

confidence: 87%

“…59 The consistent reduction in the availability of vacant sites, functional group sites, and concentration gradient on the adsorbent surface over time is another reason for this trend. 60 The results were found to be consistent with the results obtained by Mir et al 61…”

Section: Dependence On Initial Dyes Concentration and Contact Timesupporting

confidence: 90%

Biogenic fabrication of iron nanoadsorbents from mixed waste biomass for aqueous phase removal of alizarin red S and tartrazine: Kinetics, isotherm, and thermodynamic investigation

Gautam

Shivapriya

Banerjee

et al. 2019

Env Prog and Sustain Energy

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“…The fact that the Langmuir isotherm fits the experimental data better than the Freundlich model may be due to a homogeneous distribution of the active sites on the ATPC surface. It suggests that the adsorption process involves the transfer or sharing of electrons between adsorbent and adsorbate (chemisorption) rather than being a result of attractive forces between sorbent and adsorbate molecules (physisorption) . The q mS , q m , and K F constants, related to the adsorption capacity of the adsorbent, increase in the order: ATPC‐1 < ATPC‐2 < CB‐V < ATPC‐3, which is correlated with an increase in the specific surface area of the adsorbents.…”

Section: Resultsmentioning

confidence: 99%

Adsorption Properties of Activated Tire Pyrolysis Chars for Phenol and Chlorophenols

et al. 2020

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The adsorption of phenol (Ph), 4‐chlorophenol (4CP), and 2,4‐dichlorophenol (DCP) from aqueous solutions on activated tire pyrolysis chars (ATPCs) was studied in a batch system, including both kinetics and equilibrium. Different kinetic models and adsorption isotherms were used to describe the adsorption behavior of the phenols. The kinetic study shows that the process can be described by a pseudo‐second‐order model. The best fitting results for the equilibrium adsorption data were obtained with the Sips isotherm. Adsorption of the selected phenols on all of the adsorbents increased in the order Ph < 4CP < DCP. The effect of ionic strength and pH on the adsorption was also studied. The results show that the ATPCs could be used as adsorbents for the removal of phenols from aqueous solutions.

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“…Similarly, identification of the process rate‐limiting step is also ascertained via the biosorption experimental data using these models. Pseudo‐first‐order and pseudo‐second‐order models were categorized as reaction based kinetic models …”

Section: Methodsmentioning

confidence: 99%

“…Pseudo-first-order and pseudo-second-order models were categorized as reaction based kinetic models. 32 The Lagergren pseudo-first-order kinetic model is expressed mathematically as: 33…”

Section: Biosorption Kinetic Modelsmentioning

confidence: 99%

Optimization and activation of renewable durian husk for biosorption of lead (II) from an aqueous medium

Ngabura

Hussain

Ghani

et al. 2019

J of Chemical Tech & Biotech

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Background Biosorption of lead Pb(II) by durian husk activated carbon (DHAC) was investigated. The main aim of this work is to explore the effect of operating variables such as pH, biosorbent dose, temperature, initial metal ion concentration and contact time on the removal of Pb(II) from synthesized aqueous medium using a response surface methodology (RSM) technique. The experimentation was performed in two sets, namely set 1 and set 2. Results For experimental set 1, pH was set to 7.0. The optimum conditions for the remaining parameters were determined to be 0.39 g DHAC dose, 60 min contact time and 100 mg L−1 of initial metal ion concentration, which yielded maximum biosorption capacity of 14.6 mg g−1. For experimental set 2, 41.27 °C, 8.95 and 99.96 mg L−1 were the optimum conditions determined for temperature, pH and initial Pb(II) concentration, respectively; which revealed a maximum adsorption capacity of 9.67 mg g−1. Characterization of the adsorbent revealed active functional groups such as hydroxyl, carboxylic, alcohol and hemicellulose. The equilibrium adsorption data obeyed the Langmuir isotherm and pseudo‐second‐order kinetic models with maximum Langmuir uptake of 36.1 mg g−1. Conclusions The biosorbent was capable of reuse, so that the abundant durian husk could be utilized effectively for the removal of Pb(II) from polluted water. © 2018 Society of Chemical Industry

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Insight into the adsorption kinetics models for the removal of contaminants from aqueous solutions

Cited by 945 publications

References 240 publications

Biogenic fabrication of iron nanoadsorbents from mixed waste biomass for aqueous phase removal of alizarin red S and tartrazine: Kinetics, isotherm, and thermodynamic investigation

Biogenic fabrication of iron nanoadsorbents from mixed waste biomass for aqueous phase removal of alizarin red S and tartrazine: Kinetics, isotherm, and thermodynamic investigation

Adsorption Properties of Activated Tire Pyrolysis Chars for Phenol and Chlorophenols

Optimization and activation of renewable durian husk for biosorption of lead (II) from an aqueous medium

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