Optimized adsorption of 4-chlorophenol onto activated carbon derived from milk vetch utilizing response surface methodology

Noorimotlagh, Zahra; Shahriyar, S.; Soltani, Reza Darvishi Cheshmeh; Tajik, Reza

doi:10.1080/19443994.2015.1067830

Cited by 18 publications

(2 citation statements)

References 44 publications

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“…The experimental values of saturated adsorption capacities of graphene for 2-CP, 4-CP, DCP, and TCP were 88.1, 114.2, 155.3, and 175.8 mg g –1 , respectively. Comparison of the capacities for CPs onto the different sorbents from the literature with the values obtained of graphene for CPs is indicated in Table . ,,− ,− ,,− As seen here, the capacities of pristine graphene for CPs were higher than most of the sorbents as indicated in Table , except for reduced graphene oxide and graphene oxide prepared from the ultrasonic method, pleurotus sajor caju and amino-modified ordered mesoporous silica.…”

Section: Resultsmentioning

confidence: 61%

Adsorption Characteristics of Chlorophenols from Aqueous Solution onto Graphene

et al. 2017

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The adsorption of chlorophenols (CPs) on pristine graphene was investigated. The adsorption capacities of graphene were 88.1 mg g–1 for 2-chlorophenol (2-CP), 114.2 mg g–1 for 4-chlorophenol (4-CP), 155.3 mg g–1 for 2,4-dichlorophenol (DCP), and 175.8 mg g–1 for 2,4,6-trichlorophenol (TCP), respectively. The equilibrium was attained during 20 min. There was no significant effect on the adsorption amounts in the pH range of pH 1.01–8.09 for 2-CP, 1.08–8.01 for 4-CP, 1.04–7.03 for DCP, and 2.86–5.63 for TCP. The Langmuir and pseudo-second-order models supplied good fitting of the experimental data. Thermodynamic constants demonstrated that the process was endothermic and spontaneous.

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Section: Resultsmentioning

confidence: 61%

Adsorption Characteristics of Chlorophenols from Aqueous Solution onto Graphene

et al. 2017

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“…The process is a high-temperature application with wide-ranging pH and high porosity that increases adsorption capacity etc. (Noorimotlagh et al 2016, Jaafarzadeh et al 2019. Activated carbon impregnated with metal oxides increases catalytic oxidation and enhances adsorption capacities.…”

Section: Introductionmentioning

confidence: 99%

Prediction of methyl orange removal by iron decorated activated carbon using an artificial neural network

Mitra

Mukherjee

Kaparaju

2020

Environmental Technology

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Date Stones were used as a bio-degradable waste source for preparing iron impregnated activated carbon. The prepared activated carbon-containing oxides of iron were characterized using SEM, XRD, FTIR, and BET. The specific surface area of the iron decorated activated carbon was 738.65 m 2 /g. The XRD confirmed the presence of magnetite and hematite while the SEM images assured the presence of pores. The prepared activated carbon was used to remove methyl orange from wastewater. Genetic Algorithm was used to develop a model which could predict the removal efficiency of the dye. The ANN model was validated and the effect of different parameters like adsorbent dosage (0.1-1g/L), initial dye concentration (2-20 mg/L), pH (2-11), time (10-55 minutes) and temperature (30-75°C) was estimated both experimentally and predicted using the model. The adsorption process follows the Freundlich isotherm and pseudosecond-order kinetic model. The values of 1/n and KF obtained from the Freundlich isotherm designate good adsorption capacity. Both experimental and model-predicted data agrees with the kinetic model. The adsorption rate is proportionate to the square of the number of vacant adsorption sites. From the thermodynamic study, the positive worth of ΔH° indicates the energyabsorbing nature of the surface assimilation method and the process is endothermic in nature.The low values of each ΔG° (-200 to 0 kJ/mol) and ΔH° correspond to physical surface assimilation. A positive worth of ΔS° reflects the inflated randomness at the solid-aqueous interface with some structural changes in adsorbate and adsorbent.

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Decontamination of arsenic(V)-contained liquid phase utilizing Fe3O4/bone char nanocomposite encapsulated in chitosan biopolymer

Soltani

Safari

Maleki

et al. 2017

Environ Sci Pollut Res

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The application of a novel nanocomposite synthesized through the combination of FeO nanoparticles and bone char particles for the adsorption of As(V) ions in the aquatic medium was investigated. As-prepared nanocomposite was immobilized by using chitosan biopolymer. The characterization of the nanocomposite was performed via SEM, XRD, FT-IR, and BET together with the determination of zero-point charge of the adsorbent surface. As results, the obtained experimental data were fitted well with pseudo-first-order kinetic model (R = 0.997) and Langmuir isotherm model (R = 0.990) with the maximum adsorption capacity of about 112 μg/g. Increasing the dosage of nanocomposite and initial solute concentration led to increasing the adsorption capacity of As(V) ions, while decreasing the solution temperature resulted in the enhanced adsorption process. According to the results of thermodynamic study, the adsorption of As(V) ions onto the nanocomposite was spontaneous and exothermic in nature.

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Optimized adsorption of 4-chlorophenol onto activated carbon derived from milk vetch utilizing response surface methodology

Cited by 18 publications

References 44 publications

Adsorption Characteristics of Chlorophenols from Aqueous Solution onto Graphene

Adsorption Characteristics of Chlorophenols from Aqueous Solution onto Graphene

Prediction of methyl orange removal by iron decorated activated carbon using an artificial neural network

Decontamination of arsenic(V)-contained liquid phase utilizing Fe3O4/bone char nanocomposite encapsulated in chitosan biopolymer

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