Adsorption of dyes from aqueous solution under batch mode using cellulosic orange peel waste (original) (raw)
Related papers
Removal of dyes from aqueous solutions by cellulosic waste orange peel
Bioresource Technology, 1996
The adsorption of dyes such as congo red, procion orange and rhodamine-B by waste orange peel was examined at different concentrations of dyes, adsorbent dosage, agitation time and pH. The adsorption obeyed both the Langmuir and Freundlich isotherms and the process of uptake followed first-order rate kinetics. Acidic pH was favourable for adsorption for all three dyes. Desorption studies showed that alkaline pH was efficient for desorption of all the dyes.
Desalination, 2011
Biosorption potential of Date Stones (DS) and Palm-Trees Waste (PTW) for the removal of a basic dye, Methylene Blue (MB), from aqueous solution was investigated. The effects of temperature, initial dye concentration and contact time on the biosorption process were studied. Experimental data were modelled by Langmuir, Freundlich and Tempkin isotherms. Langmuir isotherm model fitted well the equilibrium data for the two sorbents (DS and PTW) comparing to the Freundlich and Tempkin isotherm models. The monolayer biosorption capacity of DS and PTW biomass for Methylene Blue was found to be 43.47 and 39.47 mg g −1 respectively. The calculated thermodynamic parameters, namely, ΔG, ΔH and ΔS showed that the biosorption of Methylene Blue on both agriculture waste biomasses was spontaneous and endothermic under examined conditions. Experimental data were also modelled using the biosorption kinetic models. The results showed that the biosorption processes of Methylene Blue on DS and PTW followed well pseudo-second-order kinetics in the temperature range 20-70°C. Results indicated that DS and PTW could be an alternative for more costly adsorbents used for dye removal.
The ability of orange peels (OP) and almond peels (AP) as adsorbents for the removal of a dyestuff, namely methylene blue (MB) from aqueous solutions has been studied. After their characterization by different techniques (elemental analysis, biochemical analysis, IR spectroscopy, thermogravimetric analysis, scanning electron microscopy, mercury porosimetry), adsorption kinetics of the dye have been investigated using common kinetic models cited in the literature: first order and pseudo-second order. The correlation coefficient has showed that the pseudo-second order kinetic equation best describes the adsorption kinetics for the tested materials. The experimental equilibrium data have been analyzed using linearized forms of Langmuir and Freundlich isotherms. The Langmuir isotherm was found to provide the best theoretical correlation of the experimental data whatever the biosorbents tested. Using the equilibrium coefficients obtained at different temperatures, various thermodynamic parameters such as ΔG°, ΔH°, ΔS° have been calculated. The thermodynamics of MB/OP and MB/AP systems indicated spontaneous and endothermic process. It was concluded that an increase in temperature results in a higher MB loading per unit weight of OP or AP.
Water Air Soil Pollution (Published by: Springer) , 2022
The present work focuses on the feasibility of elimination of Methylene Blue dye from the textile wastewater with the use of economical organic biosorbents like Sugarcane Bagasse (SCB), Peanut Hull (PHB) and Orange peel (OPB). Batch adsorption tests were performed based on pH, temperature, contact time, initial adsorbate concentration, and dose of biosorbents as independent variables by employing a central composite design (CCD) approach of response surface methodology (RSM). After 90 min of contact time, the dye adsorption equilibrium was reached. It was explained with the help of Langmuir and Freundlich adsorption isotherms for the full concentration ranges of 20–100 mg/L. RSM combined with CCD is used to optimize the experiments for achieving the optimum conditions for the removal of dye. The adsorption data are used for the kinetic modeling from the pseudo-first- and pseudo-second-order kinetic equations. Thermodynamic parameters such as changes in entropy (∆S), enthalpy (∆H), and free energy (∆G) were investigated, also showed that the adsorption was natural and endothermic by removing the randomness of color at the solid and liquid interface. Biosorbent characterization was additionally performed by Fourier-transform infrared spectroscopy (FTIR) to study the adsorption of Methylene Blue before and after the tests. The dimensionless separation factor (RL) and expected results illustrated that SCB, PHB, and OCB could be used to substitute commercially available biosorbents for aqueous solutions and eliminate Methylene Blue dye from textile wastewater
Removal of Congo Red dye from Wastewater Using Orange Peel as an Adsorbent
2020
Present study deals with the utilization of orange peel as an adsorbent for the removal of Congo Red (CR) dye from aqueous solution. The proximate analysis revealed that, the adsorbent has porous structure with volatile matter of about 79.14% and fixed carbon 13.08%. The adsorbent has neutral charge at the pH of 6.37. From the batch adsorption study, the optimum adsorbent dose found 40 g/L, the optimum pH was found to be 6.43 and equilibrium time was found 3 h. The increase in adsorption with temperature shows the endothermic nature of adsorption process. The maximum percent removal of CR was found to be 94.24 at the initial concentration of 100 mg/L at 30 °C. The isotherm analysis shows that the Langmuir adsorption isotherm is best-fitted for Congo Red adsorption on orange peel followed by Freundlich and Temkin isotherm equations. The values of the constants KL and qm are 0.053 L/mg and 11.919 mg/g respectively. Thermodynamic study shows the endothermic nature nature of the adsorpt...
Revista Eletrônica em Gestão, Educação e Tecnologia Ambiental, 2021
With the great generation of colored effluents, several methods for the removal of the color are used, being one of them the method of adsorption in solid medium. In this paper, the in natura orange peel was used as the alternative biomass for the adsorption process of methylene blue, which was characterized by moisture content, pH, apparent density, iodine number, and methylene blue index. To determine the adsorptive capacity of the methylene blue dye, pH 7 was obtained as favorable, the adsorption process showed an adsorption of 82% of the methylene blue dye and a 10 min equilibrium time, where the Freundlich isotherm presented a better adaptation to the adsorption process in orange peel, with its maximum adsorption capacity of 3.9630 mg g-1, for the methylene blue dye.
DESALINATION AND WATER TREATMENT
Colour removal from effluents remains one of the most challenging requirements faced by industries due to the difficulty of degrading dyes which consequently escape conventional wastewater treatment processes and persist in the environment. This study aimed to assess and optimise the dye adsorption performance of banana floret, a novel biosorbent. Batch experiments were conducted to assess the effects of particle size, pH, agitation, temperature, initial concentration and sorbent dose. Kinetic and equilibrium data were modelled, and mass transfer studies were conducted to elucidate the mechanisms of biosorption. Equilibrium data were best simulated using the Sips and Langmuir isotherm models. At an optimum pH of 6.0, biosorbent dose of 1.0 mg•L-1 and temperature of 300 K, a maximum sorption capacity of 219 mg•g-1 was observed. The kinetic data were best represented by the pseudo-second-order model. The dominant transport mechanism was attributed to intraparticle diffusion, while the dominant attachment mechanism was physical sorption. The Taguchi method, in combination with analysis of variance, was used to determine the optimum levels of operational parameters for maximising the biosorption of methylene blue by banana floret. The parameter group which produced the highest biosorption capacity and percent removal was determined to be A3-B1-C3 (initial concentration = 200 mg•L-1 , biosorbent dose = 500 mg•L-1 , contact time = 60 min) and A1-B3-C3 (initial concentration = 50 mg•L-1 , biosorbent dose = 2000 mg•L-1 , contact time = 20 min), respectively. Among these parameters, the initial concentration had the most significant effect on the biosorption capacity, while sorbent dose was most significant on percent removal. A predictive model based on a quadratic equation which incorporates the factor interactions was successfully developed and validated.
DESALINATION AND WATER TREATMENT
Potato peels (PP) and peanut hulls (PH) have been used as biosorbents to remove Methylene Blue (MB) from aqueous solution. By using Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and X ray diffraction (XRD) analysis, PP and PH have been characterized. FTIR analysis confirmed the presence of carboxyl and phenolic hydroxyl groups which constitute the major adsorption sites onto PP and PH. SEM micro photographs indicated the presence of tiny pores on the adsorbent surface responsible for sorption process. XRD showed the presence of crystalline structures in both adsorbents. The effect of different parameters on adsorption was investigated, and conditions were optimized. The equilibrium and kinetics data obtained were analyzed using different models. The adsorption data confirmed second order kinetics and Langmuir Isotherm to be the best fit model for both adsorbents. Thermodynamic studies showed that the sorption process of MB was endothermic and more effective at lower temperatures. The results demonstrated that PH powder has a sufficient potential as an efficient adsorbent material for the removal of basic dyes from textile wastewater. The maximum removal efficiency of PH obtained was 98.1 % and that of PP was 92.7 %.
Use of cellulose-based wastes for adsorption of dyes from aqueous solutions
Journal of Hazardous Materials, 2002
Low-cost banana and orange peels were prepared as adsorbents for the adsorption of dyes from aqueous solutions. Dye concentration and pH were varied. The adsorption capacities for both peels decreased in the order methyl orange (MO) > methylene blue (MB) > Rhodamine B (RB) > Congo red (CR) > methyl violet (MV) > amido black 10B (AB). The isotherm data could be well described by the Freundlich and Langmuir equations in the concentration range of 10-120 mg/l. An alkaline pH was favorable for the adsorption of dyes. Based on the adsorption capacity, it was shown that banana peel was more effective than orange peel. Kinetic parameters of adsorption such as the Langergren rate constant and the intraparticle diffusion rate constant were determined. For the present adsorption process intraparticle diffusion of dyes within the particle was identified to be rate limiting. Both peel wastes were shown to be promising materials for adsorption removal of dyes from aqueous solutions.