Biosorption Optimization of Cr(VI) Using Response Surface Methodology and Thermodynamics Modeling onto<i>Azolla filiculoides</i>

Ahmady‐Asbchin, Salman; Safari, Moein; Varposhti, Maryam

doi:10.1080/01496395.2014.957313

Cited by 14 publications

(3 citation statements)

References 45 publications

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“…The equilibrium adsorption data presented in Fig. were fitted with Langmuir, Freundlich, and Tempkin two‐parameter isotherm equations. The isotherm models give information about mechanism properties and tendency of the adsorbent for target species by analyzing the experimental equilibrium data .…”

Section: Resultsmentioning

confidence: 99%

Adsorptive removal of biophenols from olive mill wastewaters (OMW) by activated carbon: mass transfer, equilibrium and kinetic studies

Şenol

Hasdemir

et al. 2016

Asia-Pacific J Chem Eng

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In this study, the removal of biophenols from olive mill wastewater by activated carbon of different particle sizes has been carried out using the batch adsorption technique. The effects of the sorbent specific surface area and concentration, temperature, initial biophenols concentration, and contact time on the adsorption efficiency have been analyzed independently. The sorbent yields higher removal efficiency of biophenols as its specific surface area increases. When increasing the sorbent concentration from 10 to 50 g L À1 , the sorbent uptake capacity increases from 20% to 41%, and it reaches a maximum value of 65 mg g À1 at 298.2 K. Adsorption of olive mill wastewater biophenols is moderately rapid, being about 38% to 40% of the initial phenolic content after 120 min. Kinetic analysis shows that the adsorption process can be approximated by a pseudo-second-order model for which pore diffusion is the essential rate-controlling step. Equilibrium modeling by linearized adsorption isotherms reveals that a Langmuir-type isotherm with a preferable monolayer sorption would likely proceed. Calculated thermodynamic parameters such as Gibbs energy, enthalpy, entropy, activation energy, and sticking probability indicate that adsorption is a typical endothermic yet spontaneous process with a preferable physisorption mechanism. An external mass transfer coefficient model has been developed to determine the rate of adsorption controlled initially by the boundary layer film, with particular focus on its predictive performance.

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Section: Resultsmentioning

confidence: 99%

Adsorptive removal of biophenols from olive mill wastewaters (OMW) by activated carbon: mass transfer, equilibrium and kinetic studies

Şenol

Hasdemir

et al. 2016

Asia-Pacific J Chem Eng

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“…The effect of different items were determined as follow: pH (3)(4)(5)(6)(7)(8)(9)(10)(11)(12), isotherm (single and binary 0.4-1.2 mg/l), temperature (5,20,45 and 60°C), initial concentration of bacterial biomass (0.5-3 g), contact time for defining desorption kinetic, live and dead bacterial biosorption, the effect of desorption agents (EDTA, CH 3 COOH,NaHCO 3 , HNO 3 ,CH 3 COOH ,HCl ,CaCl 2 ,KCl ,H 2 SO 4 ). To set pH, HCl 0.1M and HNO 3 0.1 M had been used.…”

Section: Biosorption Of Single and Binary Component Heavy Metal Solutionmentioning

confidence: 99%

“…In recent years, biological methods such as biosorption, bioaccumulation processes have been considered as novel, economic, efficient, and eco-friendly alternative treatment technologies for the removal of heavy metals from contaminated wastewaters generated from various industries. Biosorption, bioaccumulation and biodegradation have been already utilized by yeast, fungi, algae, bacterium, and cyanobacteria [8,9]. Among organisms and microorganisms, bacteria play an important role in removing toxic and heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Binary biosorption of Cadmium(II) and Nickel(II) onto planococcus sp. isolated from wastewater: Kinetics, equilibrium and thermodynamic Studies

Hoseini¹,

Kaboosi²,

Ahmady‐Asbchin³

et al. 2020

Biomed Res Clin Prac

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In this present study the effects of pH, temperature, single and dual metal ion concentrations, dose of Planococcus biomass and desorption agents on the uptake of Cd(II) and Ni(II) was measured using atomic absorption spectrophotometry. To show surface adsorption of bacteria, SEM-EDX and FTIR analysis were done before and after metals adsorption. The maximum biosorption capacity of Planococcus sp determined as 0.67, 0.48 mmol g −1 for cadmium(II) and as 0.58, 0.47 mmol g −1 for nickel(II) for single and binary ion situation. The correlation coefficient for the second-order kinetic model was 0.993. The Langmuir and Freundlich isotherm models were also applied to the equilibrium of system and data were better fitted with the Langmuir isotherm.

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Response surface optimization and modeling in heavy metal removal from wastewater—a critical review

Bayuo

Rwiza

Mtei

2022

Environ Monit Assess

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Biosorption Optimization of Cr(VI) Using Response Surface Methodology and Thermodynamics Modeling ontoAzolla filiculoides

Cited by 14 publications

References 45 publications

Adsorptive removal of biophenols from olive mill wastewaters (OMW) by activated carbon: mass transfer, equilibrium and kinetic studies

Adsorptive removal of biophenols from olive mill wastewaters (OMW) by activated carbon: mass transfer, equilibrium and kinetic studies

Binary biosorption of Cadmium(II) and Nickel(II) onto planococcus sp. isolated from wastewater: Kinetics, equilibrium and thermodynamic Studies

Response surface optimization and modeling in heavy metal removal from wastewater—a critical review

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