Removal of Methylene Blue from Waste Water Using Activated Carbon Prepared from Rice Husk

Rahman, Mohammad Arifur; Amin, S. M. Ruhul; Alam, A. M. Shafiqul

doi:10.3329/dujs.v60i2.11491

Cited by 119 publications

(62 citation statements)

References 18 publications

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“…For stirring purpose magnetic stirrer was used. The pH of zero-point charge or pH ZPC was determined based on the previous method 10 . The Fourier transform infrared (FTIR) spectra of the adsorbent was recorded with Fourier transform infrared spectrophotometer in the range of 400-4000 cm -1 .…”

Section: Adsorbent Characterizationmentioning

confidence: 99%

“…To study the effect of initial Fe(II) ions on the adsorption level by varying concentration (10,20,30,40 and 50 mg/L) under the constant temperature (30, 40, 50 and 60 ˚C), pH 6.5 agitation speed (120 rpm) and 0.025 g of adsorbent dose. The removal efficiency by the effect of initial Fe(II) ions concentration was obtained from the experimental results were presented in Table 2.…”

Section: Effect Of Initial Fe(ii) Concentrationmentioning

confidence: 99%

“…It shows that the increasing initial Fe(II) concentration results decrease of the removal efficiency of Fe(II). In case of low Fe(II) ion concentrations the ratio of the initial number of moles of Fe(II) ions to available surface area of adsorbent is large and subsequently the fractional adsorption becomes independent of initial concentration 10 . However at higher concentrations of Fe(II) ions the available sites of adsorption becomes fewer and hence the percentage of Fe(II) ions which depends upon initial concentration.…”

Section: Effect Of Initial Fe(ii) Concentrationmentioning

confidence: 99%

“…A plot of q t vs. lnt should give a linear relationship for the applicability of the simple Elovich kinetic. The Elovich kinetics of Fe(II) on to PONC for various initial concentrations (10,20,30,40 and 50 mg/L) of volume 50 mL (each), adsorbent dose 0.025g, temperature 30 o C and pH 6.5.…”

Section: Simple Elovich Modelmentioning

confidence: 99%

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Adsorption Studies on the Removal of Fe(II) Ion onto Posidonia Oceanica Nano Carbon

2017

Chem Sci Trans

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Adsorption of Fe(II) ions by activated Posidonia oceanica nano carbon was studied by using batch adsorption techniques. The influence of contact time, initial concentration, dosage of adsorbent and effect of solution pH were investigated. The equilibrium adsorption data were correlated with Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Hurkins-Jura, Halsay, Radlich-Peterson, Jovanovic and BET isotherm models. The isotherm studies of R L values showed that the adsorption process was favorable. Thermodynamic parameters such as ∆H 0 , ∆S 0 and ∆G 0 were evaluated. The data indicate that, the adsorption was spontaneous and is an endothermic nature. Adsorption kinetics was tested with pseudo-second-order, Elovich model and intra -particle diffusion models. Kinetic studies indicate an adsorption pseudo-second-order reaction. This study shows that intra-particles played a major role in the adsorption of Fe(II) ions mechanism. The activated Posidonia oceanica nano carbon has high adsorption capacity and adsorption rate for the removal of Fe(II) ions from aqueous solution.

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Section: Adsorbent Characterizationmentioning

confidence: 99%

Section: Effect Of Initial Fe(ii) Concentrationmentioning

confidence: 99%

Section: Effect Of Initial Fe(ii) Concentrationmentioning

confidence: 99%

Section: Simple Elovich Modelmentioning

confidence: 99%

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Adsorption Studies on the Removal of Fe(II) Ion onto Posidonia Oceanica Nano Carbon

2017

Chem Sci Trans

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“…NZVI particle technology becoming a popular choice for treatment of hazardous and toxic wastes, and for remediation of contaminated sites [12]. In the past few years, large numbers of research works have been emerged focusing on production of more active and stable NZVIparticles.…”

Section: Introductionmentioning

confidence: 99%

Kinetic and Thermodynamics of Methylene Blue Adsorption onto Zero Valent Iron Supported on Mesoporous Silica

Hameed

Dewayanto

et al. 2016

Bull. Chem. React. Eng. Catal.

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Zero valent iron supported on mesoporous silicanano particles (NZVI/MSNs) was prepared by the aqueous phase borohydride reduction methods. Prior to the reduction, mesoporous silica nanoparticles (MSNs) were prepared through the activation of fumed silica with concentrated HCl by refluxing at 90 °C. FTIR, XRD, FESEM, EDX and BET were used to characterize theadsorbents prepared. BET surface areas of MSNs, NZVI, and NZVI/MSNs were 126, 41, and 72 m 2 /g for, respectively. The performance of NZVI/MSNs as adsorbent was examined by adsorption of methylene blue (MB), performed in series of batch experiments. In the kinetic studies, pseudo first order and pseudo second order kinetic models were examined. The pseudo second order equation provided the best fit with the experimental data. Thermodynamic studies indicated that the adsorption process is endothermic with ΔH° was 90.53 kJ/mol. Positive ΔS° (300 J/mol) and negative ΔG° (-6.42 kJ/mol) was recorded, indicating the spontaneous of the adsorption process and naturally favorable.

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Intensified removal of Malachite green by AgOH‐AC nanoparticles combined with ultrasound: Modeling and optimization

Solaymani

Ghaedi

Karimi

et al. 2017

Applied Organom Chemis

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In this work Random Forest (RF) and Response surface methodology (RSM) were used to model and predict the efficiency of malachite green removal from aqueous solution by ultrasound-assisted adsorption onto the silver hydroxide nanoparticles loaded on activated carbon (AgOH-NPs-AC). The prepared nanoparticles were characterized by SEM, FTIR, XRD and TEM. The parameters such as pH, initial MG concentration, sonication time and adsorbent dosage involved in the adsorption process were set within the ranges 2.0-10, 4-20 mg L −1 , 2-6 min and 0.005-0.025 g, respectively. The performance of the RF and CCD models for the description of experimental data was evaluated in terms of the coefficient of determination (R 2 ), the root mean squared error (RMSE), mean absolute error (MAE) and absolute average deviation (AAD). The obtained results showed that the RF model outperformed in comparison to classical statistical model for modeling the process of dye adsorption. Desirability function approach (DFA) and Genetic algorithm (GA) combined central composite design (CCD) as global optimization technique were used for simultaneous optimization of effective factors. GA and DFA were revealed that 20 mg L −1 MG by 0.025 g AgOH-NPs-AC at pH = 8.0 and sonication time for 6 min with adsorption capacity 40.98 and 41.99 mg g −1 can be removed, respectively. The equilibrium adsorption data were analyzed by Langmuir Freundlich, Temkin and Dubinin-Radushkevich isotherm models. The best fit to the data was obtained from the Langmuir model.Meanwhile, the maximum adsorption capacity for MG by 0.01, 0.02 and 0.025 g of AgOH-NPs-AC was estimated 57.143, 42.735 and 40.980 mg g −1 , respectively.Analysis of experimental adsorption data to various kinetic models shows the applicability of the second-order equation model. The variable importance principle also shows that RF give maximum importance to sonication time for removal of MG.

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Removal of Methylene Blue from Waste Water Using Activated Carbon Prepared from Rice Husk

Cited by 119 publications

References 18 publications

Adsorption Studies on the Removal of Fe(II) Ion onto Posidonia Oceanica Nano Carbon

Adsorption Studies on the Removal of Fe(II) Ion onto Posidonia Oceanica Nano Carbon

Kinetic and Thermodynamics of Methylene Blue Adsorption onto Zero Valent Iron Supported on Mesoporous Silica

Intensified removal of Malachite green by AgOH‐AC nanoparticles combined with ultrasound: Modeling and optimization

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