Preparation of the activated carbon from India shrub wood and their application for methylene blue removal: modeling and optimization

Pirsaheb, Meghdad; Rezai, Zahra; Mansouri, Amir; Rastegar, Ayoob; Alahabadi, Ahmad; Sani, Abolfazl Rahmani; Sharafi, Kiomars

doi:10.1080/19443994.2015.1008581

Cited by 43 publications

(24 citation statements)

References 47 publications

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“…precipitates on the adsorbent surface, leading to lessening the adsorption sites available on the surface area of adsorbent [45]. The superiority of NH 4 Cl-activated carbon for removal of phenol is consistent with the confirmed high capacity of activated carbons prepared in the presence of ammonium salts as an activation agent [46,47]. To investigate the effect of weight ratio (w/v) of the most suitable activation agent, that is, ammonium chloride, various amounts of this agent were used for activation of RHA.…”

Section: Effects Of Various Activation Agentssupporting

confidence: 60%

Adsorptive removal of phenol from aqueous solutions using chemically activated rice husk ash: equilibrium, kinetic, and thermodynamic studies

Jafari¹,

Alahabadi²,

Saghi³

et al. 2019

Desalination and Water Treatment

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Phenol can cause environmental problems due to low biological degradation, high toxicity and long persistence in the environment. Thus, the removal of phenol and its derivatives from water is of great importance. Application of agricultural waste materials has been intensively investigated for many years for adsorptive removal of active pollutants. The objective of this research was to improve the adsorption capacity of rice husk ash by activation with different chemical agents for removing phenol from aqueous solutions. Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller (BET), and field emission electron scanning microscopy techniques were used for characterization, and the modified rice ash husk was compared with the conventional one. Results indicated that the effect of chemical treatment by NH 4 Cl was better than the other tested chemical agents. The BET specific surface area of NH 4 Cl-activated rice husk ash (ARHA) was 543 m 2 /g, and the average pore diameter was 3.24 nm. The isotherm and kinetic studies of phenol removal by ARHA showed that the Langmuir model and the pseudo-second-order equation represented the best fit with the adsorption data. The maximum adsorption capacity of phenol onto the newly activated rice husk ash was obtained from the Langmuir isotherm model, which was 66 mg/g.

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Section: Effects Of Various Activation Agentssupporting

confidence: 60%

Adsorptive removal of phenol from aqueous solutions using chemically activated rice husk ash: equilibrium, kinetic, and thermodynamic studies

Jafari¹,

Alahabadi²,

Saghi³

et al. 2019

Desalination and Water Treatment

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show abstract

“…wood-derived activated carbon. 44 The adsorption was found increasing with the increase in pH and also higher adsorption rate was found in the initial stage of adsorption process.…”

Section: Resultsmentioning

confidence: 86%

Optimization of dye removal by diesel exhaust emission soot using response surface methodology

Singhal

Vaish

2020

Env Prog and Sustain Energy

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The waste soot particles emitted from a diesel engine were studied as a dye adsorbent for water treatment. The input parameters were optimized using response surface methodology to achieve the maximum removal of dye methylene blue (MB). Experiments were conducted according to three‐level Box–Behnken Design with three factors time, pH, and initial concentration of dye in the solution. Further, analysis of variance analysis was carried out to find the level of significance of each parameter toward dye removal. Finally, for 0.05 g of diesel soot in a 50 ml solution, the maximum dye removal predicted was more than 99%. The basic medium (pH 12) found was favorable for the adsorption of MB. Also, 96% of detergent was removed in 60 min. Langmuir isotherm model and Pseudo‐second‐order kinetic model were most suitable for equilibrium and kinetic studies, respectively, for the removal of MB on diesel exhaust emission soot.

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“…Today, utilizing adsorption process in wastewater treatment is growing rapidly, which can be attributed to its suitable characteristics that diminish many drawbacks. Various studies have already investigated the use of adsorbents such as activated carbon, graphene oxide, pumice, clay, zeolites, and biosorbents in aqueous solutions …”

Section: Introductionmentioning

confidence: 99%

“…Various studies have already investigated the use of adsorbents such as activated carbon, graphene oxide, pumice, clay, zeolites, and biosorbents in aqueous solutions. [9][10][11][12][13][14][15][16] The application of biosorbents in living form is not effective, because the toxicity of industrial wastewaters reduces the bacterial growth and increases the mortality of biosorbents during the treatment process. Hence, in addition to overcoming the toxicity of industrial wastewater, application of dead biosorbents can offer other advantages such as lack of need for culture medium and easier desorption of adsorbed pollutants.…”

mentioning

confidence: 99%

The sorption of cationic and anionic heavy metal species on the biosorbent of Aspergillus terreus: Isotherm, kinetics studies

Shokoohi

Salari

Mahmoudi

et al. 2019

Env Prog and Sustain Energy

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In this study, the capacity of Aspergillus terreus fungus biomass to remove Cr (VI) and Cd from aqueous solution was investigated. The present experimental study employed the shake flask method to cultivate fungal biomass. For the preparation of adsorbent, after inoculation of Aspergillus terreus in PDA medium, it was placed on a shaker at 150 rpm, at 25°C for 4 days. After separation of living biomass, it was boiled in a 0.5% NaOH solution. The ability of the biomass to remove of Cr (VI) and Cd from aqueous solution was examined under conditions including initial concentrations of (20–120 mg/L); pH of 3, 5, 7, and 9; contact times of 15–120 min; and the adsorbent doses of 0.1, 0.2, 0.5, 1, and 2 g. The concentration of the heavy metals was determined by an atomic absorption device. The results showed that in the optimum conditions of the input variables; contact time of 90 min, pH of 7, the initial metal concentration of 20 mg/L, and the adsorbent dose of 1 g, the removal efficiency of Cd and Cr (VI) was 94 and 89%, respectively. The processes of Cd and Cr (VI) adsorption were successfully described by Freundlich isotherm with R2 = 0.9463 and R2 = 0.9949, respectively, and well‐followed pseudo‐first‐order kinetic with R2 = 0.9935 and R2 = 0.9718, respectively. Due to the high adsorption capacity of this biomass in removing metals in comparison to other adsorbents, it can be proposed as a suitable adsorbent in treatment processes.

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Preparation of the activated carbon from India shrub wood and their application for methylene blue removal: modeling and optimization

Cited by 43 publications

References 47 publications

Adsorptive removal of phenol from aqueous solutions using chemically activated rice husk ash: equilibrium, kinetic, and thermodynamic studies

Adsorptive removal of phenol from aqueous solutions using chemically activated rice husk ash: equilibrium, kinetic, and thermodynamic studies

Optimization of dye removal by diesel exhaust emission soot using response surface methodology

The sorption of cationic and anionic heavy metal species on the biosorbent of Aspergillus terreus: Isotherm, kinetics studies

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