Removal of Cationic Dye from Aqueous Solutions by Modified Acid - Treated Pomegranate Peels (PUNICA GRANATUM): Equilibrium and Kinetic Studies (original) (raw)
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IOP conference series, 2022
Recently, the adsorption process relied on the use of low-cost, available and eco-friendly materials to reduce costs. Pomegranate peels(PPs) have been used as environmental and inexpensive bio-sorbent material to remove dye (brilliant yellow) from aqueous solution. characterization of Pomegranate peels(PPs) via two techniques like FTIR,FESEM to analyze the morphology and chemical groups of Pomegranate peels(PPs) before and after sorption of brilliant yellow dye , Adsorption method is occurred under some optimum conditions like initial dye concentration, mass of adsorbent and contact time Where the Pomegranate peels(PPs) un-activated, the ability to be recycled and used again, by washing it (water, acid and base). Isotherm Freundlich and isotherm Langmuir as models were utilized to investigate the adsorption method. It was find that the model Langmuir better described the experimental result .
Valuation of Pomegranate Peel for Cationic Dye Removal
In recent decades, the global production of pomegranate has increased considerably, leading to a remarkable increase in the amount of pomegranate peel generated. Hence, the need for its valuation. In this respect, the present work aims to attempt the potentiality of pomegranate peel as a low-cost adsorbent for methylene blue (MB) removal. The batch experiments were performed to determine the adsorption capacity of the biomass. The system variables studied include Adsorption time and initial dye concentration. It was shown that the MB adsorption onto pomegranate peel is drastically dependent on adsorption time and initial dye concentration. The rate adsorption of MB was rapid, attained equilibrium at about 60 min, a time in which the percentage removal exceeds 75%, and this at the initial dye concentration of 100 mg.L-1. The results also show that pomegranate peel has a relatively higher adsorption capacity (67,78 mg.g-1) than other biomass. That leads to contemplate the possibility that it can serve as a low-cost and eco-friendly adsorbent for the removal of other cationic dyes.
Activated carbon produced from pomelo peels (PPAC) was tested for its effectiveness in the removal of malachite green (MG) dye from aqueous solution. The PPAC prepared was characterized using TGA, BET, FTIR, SEM, pH pzc , Elemental analysis and Boehm titration, respectively. The extent of dye adsorption was investigated as a function of pH, contact time, adsorbate concentration and solution temperature. Dye removal was pH dependent, resulting in 95.06% removal at pH 8.0. Quantum chemical studies suggested that the cationic MG dye possessed minimal molecular size at planar geometry coupled with high-electrostatic interaction thereby, enhancing the adsorption at high pH. Langmuir, Freundlich and Dubinin-Radushkevich (D-R) equilibrium isotherms were used to fit the adsorption data. Langmuir isotherm fit the adsorption data most with maximum monolayer adsorption capacity of 178.43 mg/g. The kinetic data fitted the pseudo-second-order model with correlation coefficient greater than 0.99. The mean free energy E (kJ/mol) got from the D-R isotherm indicated physisorption mechanism Thermodynamic parameters; Gibbs free energy (ΔG˚), enthalpy (ΔH˚) and entropy (ΔS˚) changes were also calculated, and the values indicated that the adsorption process was spontaneous and endothermic in nature. Regeneration efficiency of spent PPAC was studied using 0.2 M HCl, the efficiency was found to be in the range of 92.71-96.35% after four cycles. The study showed that PPAC can be used as an effective, low cost and environmentally friendly adsorbent for the removal of MG dye from aqueous solution.
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.
The Study of the Adsorption of Reactive Blue 19 Dye by Activated Carbon from Pomegranate Residue
Wastewaters containing dyes are qualitatively dangerous and toxic. Researchers have, therefore, concentrated on simple and efficient methods for their treatment. The present study investigates the preparation of adsorbents from waste materials and evaluation of their performance in removing dyes from aqueous solutions. For this purpose, activated carbon is prepared from pomegranate residuals by phosphoric acid (37%) activation and used to remove the reactive blue 19 from aqueous solutions. Furthermore, the activated carbon thus obtained is characterized in terms of its morphological and textural properties, and the effects of such operation parameters as contact time, initial pH, adsorbent dose, and initial dye concentration on dye removal efficiency are evaluated. Results indicate the high surface area (SBET) of the pomegranate-based activated carbon (572.53 m2/g) and its maximum dye removal efficiency (98.16%) for a contact time of 5 minutes, at an initial pH of 11 with 3.5 gr/L of the adsorbent in an aqueous solution with an initial dye concentration of 300 mg/L. Finally, adsorption isotherm studies (Langmuir, Freundlich, and Temkin) and kinetic studies (the pseudo first-order, pseudo-secondorder, Elovich and intraparticle diffusion kinetic models) are performed to show that the adsorption process follows a Langmuir isotherm equation (R2=0.955) and the pseudo-second order kinetic model (R2=0.997).
Journal of Experimental Biology and Agricultural Sciences, 2022
A green adsorbent derived from Jackfruit leaf powder (JLP) was used to eliminate Acid Yellow 99 (AY 99) dye from an aqueous medium in this study. We checked the effect of pH, biomass dosage, and temperature (process parameters) on the adsorption potential of AY 99 was explored using the CCD model integrating the RSM approach. At a pH of 2.5, biosorbent dosage of 4 gL-1, and a 30°C temperature, maximum removal was preferred. ANOVA was incorporated to observe the importance of experimental variables and their interactions. The solution pH (A) and biomass dose (C) had the greatest effects on the decolorization of AY 99, according to the findings. ANOVA was used to identify the most important factors, which included two independent variables (A and C) and two quadratic model terms (A2 and C2). The kinetic data were effectively interpreted using a pseudo 2nd order with film diffusion model combination, indicating the chemisorptions phenomenon. Following the model of Langmuir isotherm, th...
Equilibrium studies for the Adsorption of Acid Red 14 and Direct Yellow 86 Dyes Aqueous Solution
This article describe the adsorption of acidic and direct dyes, namely Acid Red 14 (AR14) and Direct Yellow 86 (DY86), from aqueous solution onto activated carbon from walnut shell (ACW) as an eco-friendly and low cost adsorbent. Laboratory prepared ACW were characterized by Barrett-Joiner-Halenda (BJH) and Brunauer-Emmett-Teller (BET) pore structural parameters. The effect of various experimental parameters such as initial dye concentrations, pH and ACW doses were investigated in a batch adsorption technique. Optimum conditions for removal of dyes were found to be pH=1 and 1g of adsorbent dosage in equilibrium time of 48 h. It is shown that, lower equilibrium uptake further increase in temperature, because of the exothermic dyes biosorption process. The plot of the removal versus adsorbent dosage shows the effect of the different frequency of ACW dyes. Equilibrium adsorption isotherms were measured and the experimental data were analyzed using Langmuir, Freundlich and Temkin isotherm equations. It was found that data for DY86 Temkin isotherm is preferred (R 2 =0.93), while for AR14, the Freundlich isotherm is more applicable (R 2 =0.65). The ACW might be successfully used for the removal of dyes from liquid industrial wastewater.
A novel agricultural waste adsorbent for the removal of cationic dye from aqueous solutions
Journal of Hazardous Materials, 2009
In this paper, pineapple stem (PS) waste, an agricultural waste available in large quantity in Malaysia, was utilized as low-cost adsorbent to remove basic dye (methylene blue, MB) from aqueous solution by adsorption. Batch mode experiments were conducted at 30 • C to study the effects of initial concentration of methylene blue, contact time and pH on dye adsorption. Equilibrium adsorption isotherms and kinetic were investigated. The experimental data were analyzed by the Langmuir and Freundlich models and the isotherm data fitted well to the Langmuir isotherm with monolayer adsorption capacity of 119.05 mg/g. The kinetic data obtained at different concentrations were analyzed using a pseudo-firstorder and pseudo-second-order equation and intraparticle diffusion equation. The experimental data fitted very well the pseudo-second-order kinetic model. The PS was found to be very effective adsorbent for MB adsorption.
2019
The textile wastewater contains different dyes which are harmful to the environment. Therefore, wastewater from textile industry need to be treated before being discharged into the environment. The removal of dyes from effluent via adsorption process using pomegranate peel waste provides an attractive alternative treatment. The present work describe the application of biomaterial, pomegranate peel waste (PPW) for the treatment of cationic dye, methylene blue from the surface of water. The main parameters affecting the adsorption of methylene blue i.e., sorption time, mass of sorbent and pH of water were optimized. Dye removal test performed with PPW revealed that it performed at pH 11 with contact time 30 min and 1.0 g of adsorbent dosage. The biosorption kinetic followed pseudo-second order model and Langmuir isotherm model for the isotherm analysis.