Remediation of lead by pretreated red algae: adsorption isotherm, kinetic, column modeling and simulation studies

Hanbali, Mohammad; Holail, Hanafy; Hammud, Hassan H.

doi:10.1080/17518253.2014.955062

Cited by 83 publications

(52 citation statements)

References 36 publications

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“…Other studies also reported that pseudo-first-order kinetic model as a better fit for biosorption of Pb (II) and Zn (II) ions. (Hanbali et al 2014;Singh and Chopra 2014).…”

Section: Resultsmentioning

confidence: 99%

Structural Changes of Bacillus subtilis Biomass on Biosorption of Iron (II) from Aqueous Solutions: Isotherm and Kinetic Studies

Kanamarlapudi

Muddada

2019

Polish Journal of Microbiology

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Various microbial biomasses have been employed as biosorbents. Bacterial biomass has added advantages because of easy in production at a low cost. The study investigated the biosorption of iron from aqueous solutions by Bacillus subtilis. An optimum biosorption capacity of 7.25 mg of the metal per gram of the biosorbent was obtained by the Inductive Coupled Plasma Optical Emission Spectroscopy (ICP-OES) under the experimental conditions of initial metal concentration of 100 mg/l, pH 4.5, and biomass dose of 1 g/l at 30°C for 24 hrs. The data showed the best fit with the Freundlich isotherm model while following pseudo-first-order kinetics. Scanning Electron Microscope (SEM) and Energy Dispersive X-ray (EDX) analysis confirmed iron biosorption as precipitates on the bacterial surface, and as a peak in the EDX spectrum. The functional hydroxyl, carboxyl, and amino groups that are involved in biosorption were revealed by the Fourier Transform Infrared spectroscopy (FTIR). The amorphous nature of the biosorbent for biosorption was indicated by the X-ray Diffraction (XRD) analysis. The biomass of B. subtilis exhibited a point zero charge (pHpzc) at 2.0.

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“…Other studies also reported that pseudo-first-order kinetic model as a better fit for biosorption of Pb (II) and Zn (II) ions. (Hanbali et al 2014;Singh and Chopra 2014).…”

Section: Resultsmentioning

confidence: 99%

Structural Changes of Bacillus subtilis Biomass on Biosorption of Iron (II) from Aqueous Solutions: Isotherm and Kinetic Studies

Kanamarlapudi

Muddada

2019

Polish Journal of Microbiology

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“…The figure and the high correlation coefficient values indicate that the model provides good fitting to the three adsorbates. The good fitting of the experimental data to the Temkin model indicates that the adsorption process depends on the heat of adsorption (Hanbali et al 2014). The values of the parameter b in Temkin equation (related to heat of adsorption) are 12.5, 10.8, and 11.21 kJ/mol for 2,4 dinitrophenol, 2 nitrophenol, and 4 nitrophenol, respectively.…”

Section: Two-parameter Isothermmentioning

confidence: 94%

Removal of three nitrophenols from aqueous solutions by adsorption onto char ash: equilibrium and kinetic modeling

2018

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In this research, the removal of 2,4 dinitrophenol, 2 nitrophenol and 4 nitrophenol from aqueous solution using char ash from animal bones was investigated using batch technique. Three 2-parameter isotherms (Freundlich, Langmuir, and Temkin) were applied to analyze the experimental data. Both linear and nonlinear regression analyses were performed for these models to estimate the isotherm parameters. Three 3-parameter isotherms (Redlich-Peterson, Sips, Toth) were also tested. Moreover, the kinetic data were tested using pseudo-first order, pseudo-second order, Elovich, Intraparticle diffusion and Boyd methods. Langmuir adsorption isotherm provided the best fit for the experimental data indicating monolayer adsorption. The maximum adsorption capacity was 8.624, 7.55, 7.384 mg/g for 2 nitrophenol, 2,4 dinitrophenol, and 4 nitrophenol, respectively. The experimental data fitted well to pseudo-second order model suggested a chemical nature of the adsorption process. The R 2 values for this model were 0.973 up to 0.999. This result with supported by the Temkin model indicating heat of adsorption to be greater than 10 kJ/mol. The rate controlling step was intraparticle diffusion for 2 nitrophenol, and a combination of intraparticle diffusion and film diffusion for the other two phenols. The pH and temperature of solution were found to have a considerable effect, and the temperature indicated the exothermic nature of the adsorption process. The highest adsorption capacity was obtained at pH 9 and 25 °C.

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“…7-9), the sum square error function (SSE), root mean square error (RMSE) and composite fractional error (HYBRD) were applied to confirm the kinetic models fitting (where N is the number of data and P is the number of parameters) along with the regression coefficient R 2 . The lower the values of SSE, RMSE and HYBRD errors and the higher the value of R 2 , the better the fitting of the model (Hanbali et al 2014).…”

Section: Adsorption Kinetics and Isotherms Studiesmentioning

confidence: 99%

Magnetic tuned sorghum husk biosorbent for effective removal of cationic dyes from aqueous solution: isotherm, kinetics, thermodynamics and optimization studies

et al. 2019

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Dyes containing effluents constitute hazards to the environments and endanger human and aquatic lives. Although activated charcoal has been adjudged the best for adsorption treatment of wastewater, its regeneration and high cost have limited their applications, hence the quest for alternative adsorbent. Magnetic tuned biosorbent was prepared from sorghum husks by in situ co-precipitation of Fe 3 O 4 . It was characterized using Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy and scanning electron microscopy. The biosorbent was then used for the removal of crystal violet (CV) and methylene blue (MB) dyes from aqueous solutions in a batch process. The effects of temperature, initial dye concentration, dosage, contact time as well as pH were investigated, and data obtained were analysed with appropriate kinetic and isotherm models. Response surface method was used for the optimization study of the adsorption using Box-Behnken experimental design. Pseudo-second-order kinetic model was the most appropriate model for both dyes with correlation coefficient (R 2 ) > 0.9 and low % standard error values. The equilibrium data were best fitted with Langmuir isotherm with maximum adsorption capacity (Q max ) of 18.87 and 30.00 mg g −1 for CV and MB, respectively. The thermodynamic parameters for the adsorption processes showed that it was spontaneous, endothermic and random systems with free energy changes less than zero, enthalpy changes (∆H) of + 49.81 and + 51.18 kJ mol −1 , entropy changes (∆S) of + 178.39 and + 177.34 J mol −1 K −1 for MB and CV dyes, respectively. Optimization studies revealed that 95% of the dyes are removable at 1.0 g adsorbent dosage and pH of 4.05 at 50 °C with initial dye concentration of 50 mg L −1 . The prepared adsorbent is cheap, easily recycled and highly effective for the treatment of dye-contaminated water.

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Remediation of lead by pretreated red algae: adsorption isotherm, kinetic, column modeling and simulation studies

Cited by 83 publications

References 36 publications

Structural Changes of Bacillus subtilis Biomass on Biosorption of Iron (II) from Aqueous Solutions: Isotherm and Kinetic Studies

Structural Changes of Bacillus subtilis Biomass on Biosorption of Iron (II) from Aqueous Solutions: Isotherm and Kinetic Studies

Removal of three nitrophenols from aqueous solutions by adsorption onto char ash: equilibrium and kinetic modeling

Magnetic tuned sorghum husk biosorbent for effective removal of cationic dyes from aqueous solution: isotherm, kinetics, thermodynamics and optimization studies

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