A new biosorbent with controlled grain (I). Efficient elimination of cationic dyes from textile dyeing wastewater (original) (raw)
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Removal of dyes from textile effluent using fruits and vegetable peels as efficient biosorbents
Journal of emerging technologies and innovative research, 2020
Color removal from effluents polluted with dyes of textile industries has been considered a challenge due to the difficulty faced in treating such wastewaters. Natural materials such as polysaccharides have gained attention due to their peculiar properties such as being biocompatible, biodegradable, renewable and non-toxic. Due to these properties they are used as efficient bio sorbents. In this study carbonized bio peels of fruits and vegetable were used as simple adsorbents for removal of dyes. These materials were also evaluated for different pH, dye concentration, particle size and contact time of adsorbent for the removal of dyes from wastewater. Experiment results have shown that on decreasing the concentration of dyes along with increase in contact time the dye removal from bio char was more effective. The study is the preliminary effort for use of carbonized bio peel for removal of colorants in effluent waters. Keywords—dyes, bio peels, carbonization, adsorption.
Desalination and Water Treatment, 2014
The present research explores the viability of pineapple peel, an agricultural effluent discharged from the food can processing industries for removing methylene blue (MB) dye from the aqueous solution. The effects of contact time, initial concentration, and solution pH on the adsorptive uptake of MB were investigated in a batch mode study. The morphological and functional characterization of the adsorbent was performed using the scanning electron microscopy and Fourier transform infrared analysis. The adsorption equilibrium was simulated using the Langmuir, Freundlich and Temkin isotherm models. Kinetic modeling was fitted to the pseudo-first-order and pseudo-second-order kinetic equations, while the adsorption mechanism was determined using the intraparticle diffusion model. Equilibrium data were favorably described by the Langmuir isotherm model, with a maximum monolayer adsorption capacity of 97.09 mg/g. The results provide a strong evidence to support the potential use of pineapple waste as an effective adsorbent for the treatment of textile wastewater.
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 %.
Adsorption of dyes from aqueous solution under batch mode using cellulosic orange peel waste
DESALINATION AND WATER TREATMENT, 2018
The present work aimed at studying the use of orange peel (OP) biosorption for the removal of methylene blue (MB) and Congo red (CR) from aqueous solution. The influences of initial dye concentration and contact time on the biosorption process were studied. Experimental data were modeled by Langmuir and Freundlich isotherms. The former fitted better the equilibrium data for both dyes. The monolayer biosorption capacity of OP was 256.4 and 102.0 mg/g for MB and CR, respectively. The calculated thermodynamic parameters, namely ∆G, ∆H and ∆S showed that the biosorption of the two dyes was spontaneous and exothermic under the examined conditions. Experimental data were also analyzed using biosorption kinetic models. The results showed that the biosorption processes of dyes on OP obey pseudo-second-order kinetics. Our results prove that an agriculture waste (i.e. OP) can be used to eliminate dyes from aquatic solution efficiently.
A New Low Cost Biosorbent for a Cationic Dye Treatment
The aim of our study consists to investigate the adsorption of Methylene Blue from aqueous solution by a new biosorbent prepared from Papaya seed. Adsorption behavior of the cationic dye was analyzed by variation of solution pH, contact time, adsorbent dose, and temperature. Adsorption isotherms were studied according to the Langmuir and Freundlich Model, and adsorption kinetics according to pseudo first and second order. Results show that the maximum adsorption is obtained at ambient temperature with the yield of 98.82% and was reached in first 20min (pH = 10, adsorbent dose of 100 mg in 50 mL). The Langmuir isotherm shows a correlation coefficient of 99.4% higher than 95.4%obtained for Freundlich model and the adsorption kinetic model follow a pseudo-second order with a maximum adsorption capacity of 52.28 mg/g.
Potential Application of Orange Peel as an Eco-friendly Adsorbent for Textile Dyeing Effluents
Research Journal of Textile and Apparel, 2013
The use of low-cost and eco-friendly adsorbents has been investigated as ideal alternatives to the current expensive methods for removing dyes from waste water. Orange peel (OP) was used as a low cost natural waste adsorbent for the removal of textile effluents. The effectiveness of (OP) in adsorbing ;C.I. Direct Red 79 (DR 79) and C.I. Direct Yellow 27 (DY 27) from their dye baths has been studied as a function of pH, solid/liquid ratio, agitation time and initial dye concentration. The sorption isotherms were analyzed using Langmuir and Frendlich models. The results indicated that acidic solutions supported the adsorption of the studied dyes within (OP). Adsorption kinetic models were analyzed using the pseudo-first, second order equation and intraparticle diffusion equation. The results showed that the order equation fitted the experimental data very well. By the way, the effect of adsorbent surface was analyzed by scanning electron microscope (SEM), whereas the SEM images showed reasonable agreement with adsorption measurements.
Potential Application of Orange Peel (OP) as an Eco-friendly Adsorbent for Textile Dyeing Effluents
The use of low-cost and eco-friendly adsorbents has been investigated as ideal alternatives to the current expensive methods for removing dyes from waste water. Orange peel (OP) was used as a low cost natural waste adsorbent for the removal of textile effluents. The effectiveness of (OP) in adsorbing ;C.I. Direct Red 79 (DR 79) and C.I. Direct Yellow 27 (DY 27) from their dye baths has been studied as a function of pH, solid/liquid ratio, agitation time and initial dye concentration. The sorption isotherms were analyzed using Langmuir and Frendlich models. The results indicated that acidic solutions supported the adsorption of the studied dyes within (OP). Adsorption kinetic models were analyzed using the pseudo-first, second order equation and intraparticle diffusion equation. The results showed that the order equation fitted the experimental data very well. By the way, the effect of adsorbent surface was analyzed by scanning electron microscope (SEM), whereas the SEM images showed reasonable agreement with adsorption measurements.
The goal is to determinate the technical feasibility of using agroindustrial wastes for adsorption of dyes. The pH pzc of Brewer's spent grains and Orange peel is 5.3 and 3.5, respectively. The equilibrium isotherms of Basic Blue 41, Reactiive Black 5, and Acid Black 1 were carried out without pHs control which ranging between 4 and 5.5. The equilibrium concentrations for both adsorbents were fitted by the Freundlich and Langmuir models. The maximum adsorption capacity measured for Basic Blue 41, Reactive Black 5, and Acid Black 1 was 32.4, 22.3, and 19.8 mg g −1 for Brewer's spent grains; and 157, 62.6, and 45.5 for orange peel, respectively. The kinetic of process was fitted by the model of pseudo-second order. The constant rate for orange peel decreased to extend the initial concentration of dye increased, obtaining 4.08 * 10 −3 −0.6 * 10 −3 (Basic Blue 41), 2.98 * 10 −3 −0.36 * 10 −3 (Acid Black 1), and 3.40 * 10 −3 −0.46 * 10 −3 g mg −1 min −1 (Reactive Black 5). The best removal efficiency was obtained in orange peel with values started from 63% to 20%. Consequently, according the results obtained there are two positive effects, the reuse of agricultural wastes and its use as low-cost adsorbent of the dyes.
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.
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