Removal Of Methyl Orange Dye Research Articles

Investigation of Photocatalytic Efficiency of Supported CuO Nanoparticles on Natural Zeolite Particles in Photodegradation of Methyl Orange.

In the current work, CuO nanoparticles were deposited on natural zeolite's particles to resolve the drawbacks of zeolite catalysis. The synthesized composites were characterized by XRD, SEM, BET, and DRS analyses. The results illustrated that in the 15% CuO composite, CuO nanoparticles with a size of 21 nm are deposited on the surface of the zeolite particles. Deposition of CuO nanoparticles on zeolite's particles decreased the specific surface area from 35 m²/g (pure zeolite) to 28 m²/g (20% CuO composite), and causes a red shift in the absorption edge of the sample to 796 nm for 20% CuO composite. In order to compare the samples' performances in eliminating water pollutants, methyl orange dye removal was investigated. The analyses indicated that the optimum efficiency (85% in 120 min) belongs to zeolite-15% CuO composite with a band gap of 1.70 eV.

Recycling of Agriculture Wastes for Efficient Removal of Methyl Orange Dye Using Batch Adsorption Unit

The main purpose of this study is to exam the ability of agriculture wastes without pretreatment such as date palm fibers (DPF), sawdust (SD), rice husk (RH) as low-cost adsorbents for removing of methyl orange dye (MO) from industrial wastewater. The operating parameters were designed under isothermal batch conditions to study the influence of pH (2-10), initial concentration of MO dye (100-500) mg/l, adsorbent dose (0.1-1) g/100 ml and contact time (10-150) min. The optimum conditions were pH = 2, the initial concentration of dye = 100 mg/l, the amount of adsorbent dose = 0.6 g/100ml and 120 min contact time. At these conditions, the maximum removal efficiency was 95%, 86% and 77% for DPF, SD, and RH, respectively. There are two advantages to this work, it can remove MO dye from wastewater and disposal of agricultural wastes. The equilibrium results were compared with the most common isotherm adsorption models, Langmuir and Freundlich models, to measure the conformity of results obtained. It was fitted with the two models with a high correlation coefficient (R2) for all adsorbents.

Methyl orange dye removal using Ni/Fe-NO3 and Ni/Fe-[α-SiW12O40] layered double hydroxides

The material of layered double hydroxide (LDH) Ni/Fe-NO3 was prepared by coprecipitation method under basic condition. Ni/Fe LDH was modified by intercalation using K4[α-SiW12O40] to form Ni/Fe-[α-SiW12O40]. All materials were characterized by X-ray and FTIR spectroscopy. Ni/Fe LDH and intercalated Ni/Fe LDH were used as adsorbent of methyl orange dye from the aqueous solution. The parameter of adsorption such as kinetic and also thermodynamic adsorption of methyl orange on LDHs were investigated. X-Ray analysis showed that the diffraction at 11.53 ° [003] of Ni/Fe-NO3 has interlayer distance 7.67 Å shift to 8.20 ° [003] of Ni/Fe-[α-SiW12O40] with interlayer distance 10.78 Å. FTIR spectra of Ni/Fe-NO3 and Ni/Fe-[α-SiW12O40] show the wavenumber at 1600 cm−1 due to vibration of LDHs anion. Adsorption of methyl orange onto Ni/Fe-NO3 and Ni/Fe-[α-SiW12O40] follow the pseudo second-order kinetic model, where intercalated material has a higher reactivity than Ni/Fe-NO3 before intercalation. Isotherm model Freundlich was more fitted than isotherm Langmuir for the adsorption of methyl orange on LDHs with multilayer physical adsorption process. Adsorption capacity of methyl orange on Ni/Fe-[α-SiW12O40] as adsorbent was slightly higher (up to 7.226 mg.g−1) than Ni/Fe-NO3 as adsorbent (3.190 mg.g−1).

Novel biomolecule-capped CdTe nanoparticles for highly efficient photodegradation of methyl orange dye under visible-light irradiation

In this study, L-arginine-capped cadmium telluride (CdTe) nanoparticles (NPs) were successfully prepared using the hydrothermal process. The formation, morphology, and physicochemical properties of the prepared samples were successfully characterized using different analytical techniques, such as X-ray diffraction (XRD), Fourier transforms infrared (FTIR), High-resolution transmission electron microscopy (HRTEM), Ultraviolet–visible spectroscopy (UV–Visible) and Photoluminescence spectroscopy (PL). The photocatalytic activity of the prepared samples was evaluated by the degradation of methyl orange (MO) dye under visible-light. It was observed that 86.3% MO dye removal efficiency was achieved over L-arginine-capped CdTe NPs, which was 1.6 times higher than that of the bare CdTe NPs. Interestingly, the L-arginine-capped CdTe photocatalyst was recycled in four consecutive runs without significant activity loss.

Adsorption of Methyl Orange Dye onto Raw Maize Cob and Maize Cob Activated Carbon: Isotherms and Thermodynamic Studies

This study was aimed to evaluate the adsorption of Methyl orange (MO) onto raw maize cob (RMC) and maize cob activated carbon (MCAC) from aqueous solution using batch adsorption studies. The produced adsorbents were characterized by Scanning electron microscope (SEM), and Fourier transform infrared spectroscopy (FTIR). The influence of contact time, dosage, concentration, temperature, and pH were investigated as well as Isotherm and Thermodynamic studies. Effect of contact time showed that Methyl orange adsorption were found to reach equilibrium within 125 and 110 minutes with optimum percentage removal of about 86.98% and 94.57% for raw maize cob and maize cob activated carbon respectively. The dye removal efficiency was found to increase with increasing initial dye concentration from 10 mg/L to 100 mg/L, and adsorption efficiency was found to be high at lower pH. However, increase in the dosage of the adsorbents lead to the increase in the adsorption process. The equilibrium adsorption data were analyzed using four adsorption models: Langmuir, Freundlich, Temkin, and D-R. The results revealed that MO with raw maize cob and maize cob activated carbon fit well to Freundlich with R2 value 0.977 and Temkin with R2 value 0.990 respectively and mean adsorption energy calculated from D-R shows it is physical adsorption and also values of enthalpy and Gibbs free energy proves that. Values of activation parameters such as free energy changes (∆G), enthalpy change (∆H) and entropy change (∆S) were calculated using Van't Hoff equation. All ∆G values were negative indicating that the adsorption was feasible and spontaneous. The result indicated that RMC and MCAC can be used for removal of MO from aqueous solution. The maize cob waste which is discarded as waste material was found to be effective adsorbent for the removal of Methyl orange dye from aqueous solution. Â

Synthesis of Chitosan-Silica Nanocomposite for Removal of Methyl Orange from Water: Composite Characterization and Adsorption Performance

Commercial chitosan (CH) was compositing with nanosilica prepared by the sol-gel method and was applied as an adsorbent for removal of Methyl-Orange (MO) dye from wastewater. Chitosan-Silica (CHS) was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), atomic force microscopy (AFM), fourier transforms infrared spectroscopy (FTIR) and BET. The adsorption capacity of MO on CHS reached maximum 7.0mg.g−1 on pH range 2.5 to 5, at equilibrium time 20 min. The effects of parameters, such as contact time, the adsorbent dosage of adsorbent, initial dye concentration on the removal of MO dye were examined. In general, the short time of MO dye removal, high adsorption capacity high, and dispensability in water, easy to remove by filtration suggests that CHS possesses high potential application for removal of MO from water, and can be considered as an eco-friendly adsorbent in water treatment processes.

In2O3 catalyst supported on carbonaceous nanohybrid for enhancing the removal of methyl orange dye from aqueous solutions

In2O3 catalyst supported on carbonaceous nanohybrid for enhancing the removal of methyl orange dye from aqueous solutions

Preparation of novel aminated chitosan schiff’s base derivative for the removal of methyl orange dye from aqueous environment and its biological applications

A novel, eco-friendly aminated chitosan Schiff’s base (ACSSB@ZnO) was developed and utilized to remove MO from aqueous environment. The impact of different significant parameters, for example, pH (3–11), adsorbent dose (0.1–0.6 g), contact time (0–120 min), and temperature (303–323 K) have been explored by batch process. Kinetic data was illustrated by pseudo-second-order model and the isotherms fitted well with Langmuir isotherm model. The highest sorption capacity of ACSSB@ZnO was observed to be 111.11 mg/g at 323 K. Positive enthalpy and entropy values demonstrated that the MO adsorption procedure was an endothermic. Negative Gibbs free energy values implied the spontaneous nature of the adsorption system. Moreover, reusability experiments were studied and it can be regenerated by using NaOH as effluent.

Chitosan–polyaniline–copper(II) oxide hybrid composite for the removal of methyl orange dye

Chitosan–polyaniline–copper(II) oxide (Ch–PANI–CuO) nanocomposite has been synthesized using batch adsorption method. It was characterized using UV–Vis, scanning electron microscopy (SEM), X-ray diffraction and Fourier transform infrared (FTIR) and transmission electron microscopy (TEM). The SEM and TEM showed that the surface of the nanocomposite was rough and porous with pleats, which is probably responsible for better dye adsorption. The maximum percentage of dye degradation was found to be 94.6% for methyl orange dye. The desorption study and FTIR results confirmed the presence of hydroxyl and amino functional groups. The results clearly indicate that the polymer matrix could be used as an adsorbent for the removal of methyl orange from aqueous solution.

Utilization of a novel activated carbon adsorbent from press mud of sugarcane industry for the optimized removal of methyl orange dye in aqueous solution

In this study, a novel activated carbon adsorbent from the press mud of a sugarcane industry was used to remove methyl orange dye (MOD) from aqueous solution and was optimized via response surface methodology using the central composite design. The adsorbent was characterized by FTIR and SEM analysis and showed the presence of functional groups such as alcohols, nitriles, amides, alkane, alkyl halides, and alkenes, and it also showed fibrous surface morphological appearance. The factors affecting MOD adsorption, such as initial concentration, adsorbent dose, and contact time were examined, and optimal pH 2.0 to remove MOD in an aqueous solution that is found in various studies is also utilized. The results showed maximum MOD removal rate of 98.68% when the initial concentration, adsorbent dose, and contact time were optimally set as 24.17 mg/L, 0.5 g, and 20 min, respectively. The analysis of the equilibrium data revealed that MOD adsorption using press mud activated carbon best fitted the Langmuir isotherm (R2 = 0.96103) which implies monolayer adsorption process. Also, the kinetics of MOD adsorption using press mud activated carbon followed a pseudo-first-order model (R2 = 0.96096) which means that the active sites are proportional to the non-active sites during the adsorption process.

Bimetal oxide decorated graphene oxide (Gd2O3/Bi2O3@GO) nanocomposite as an excellent adsorbent in the removal of methyl orange dye

Methyl orange (MO) dye, with frequent usage in several industries, is a threat to the environment owing to its toxic nature. Wastewater from several industries must be treated before release to the environment. Here, we have synthesized Gd2O3/Bi2O3@GO nanocomposite through the one-pot hydrothermal method as an adsorbent for removal of methyl orange dye and then the result was compared with Bi2O3@GO and Gd2O3@GO nanocomposites. From X-Ray diffraction (XRD) study hexagonal Bi2O3 nanoparticle and cubic Gd2O3 nanoparticles were found on the GO sheets and the functional groups in the nanocomposite were also confirmed from the Fourier transform infrared (FT-IR) spectroscopy technique. Morphologically, flakes type Bi2O3 nanoparticle and granular Gd2O3 nanoparticle were observed on GO sheets, which were further analyzed through transmission electron microscopy (TEM) technique. At an optimized contact time (45 min), amount (5.0 mg), pH (6) and temperature (35 °C), the adsorption study was performed. The adsorption capacity of the Bi2O3@GO, Gd2O3@GO and Gd2O3/Bi2O3@GO nanocomposite were measured to be 308 mg g−1 and 392 mg g−1 and 544 mg g−1, respectively. The removal efficiency of Bi2O3@GO, Gd2O3@GO and Gd2O3/Bi2O3@GO nanocomposite were recorded to be 72%, 82.3%, and 95%, respectively. The adsorption experiment with Gd2O3/Bi2O3@GO nanocomposite follows the Langmuir adsorption isotherms and pseudo-second-order kinetic model.

Synthesis and characterization of crosslinked chitosan for effective dye removal antibacterial activity

A novel binary crosslinked material based on chitosan [chit-cl-Poly (AA-co-Am)] has been synthesized through crosslinking employing ceric ammonium nitrate (CAN) initiator under N2 atmosphere for the effective removal of methyl orange dye as well as antibacterial studies. The synthesized adsorbent was characterized by FT-IR, SEM, XRD and TGA techniques. The effect of various process parameters such as pH, time, adsorption dose, and temperature on the removal of methyl orange was investigated. The isotherm data of the adsorption experiments obey the classical Freundlich adsorption isotherm while the kinetic data followed the pseudo-second-order kinetics. The antibacterial behavior of optimized samples was evaluated by the determination of maximum inhibitor growth of bacteria such as Escherichia coli (E. coli), Staphylococcus aureus and (S. aureus) Pseudomonas aeruginosa (P. aeruginos). The present study provides substantial evidence to prove beyond doubt that material based on chitosan [chit-cl-Poly (AA-co-Am)] seems to have the potential for effective removal of dyes from aqueous streams which can be extended to systems of significant importance.

Fabrication of mixed phase CaFe2O4 and MnFe2O4 magnetic nanocomposite for enhanced and rapid adsorption of methyl orange dye: statistical modeling by neural network and response surface methodology

In this study, a new magnetic material, mixed phase of CaFe2O4 and MnFe2O4 magnetic nanocomposite (CaF-MnF-MNC) was successfully synthesized by a facile co-precipitation method. The CaF-MnF-MNC was used as an adsorbent to explore its potential for remediation of methyl orange (MO) dye from aqua matrix. The X-ray diffraction (XRD) pattern of the prepared material confirms the formation of mixed phase of CaFe2O4 and MnFe2O4 spinel ferrites. Room temperature vibrating sample magnetometer (VSM) measurement reveals saturation magnetization of CaF-MnF-MNC as 38.17 emu/g, which could separate the adsorbent from dye solution efficiently. The batch mode adsorption experiments revealed that CaF-MnF-MNC has higher adsorptive potential for MO dye as compared to pure CaFe2O4 and MnFe2O4 nanoparticles. Response surface methodology (RSM) based optimization revealed the optimal experimental condition at CaF-MnF-MNC dose of 0.58 g/L, initial MO dye concentration of 98.37 mg/L and contact time of 24 min for maximum MO dye removal efficiency of 99.88%. Artificial neural network (ANN) modeling has shown better prediction ability for MO dye adsorption efficiency as compared to RSM model. The second order kinetic and Langmuir isotherm models were found to be best fitted with the experimental data and CaF-MnF-MNC exhibited maximum MO dye adsorption capacity of 344.83 mg/g.

Removal of methyl orange dye using activated biochar derived from pomelo peel wastes: performance, isotherm, and kinetic studies

The activated biochar derived from pomelo peel waste (PPAB) was prepared using pomelo peel (PP) wastes as the raw materials via chemical activation with phosphoric acid (H3PO4) for the removal of methyl orange (MO) dye in wastewater. The materials were characterized by various analytic methods including scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), N2 adsorption-desorption analysis, X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectrum (FTIR) and zeta potential analysis. The adsorption performance of PPAB was investigated and optimized with MO dye as target adsorbate under various operation parameters (contact time, pH, adsorbent dosage and initial dye concentration). The optimum dosage of PPAB was obtained 1 g/L, and the maximum adsorption took place at pH 3.0. Additionally, the results of equilibrium isotherms indicate the good fit of the adsorption data by Freundlich isotherm model, and the adsorption process belonged to the multilayer adsorption. The theoretical maximum adsorption capacity of PPAB calculated with Langmuir model reached to 163.105 mg/g at 25 °C. The kinetic results revealed that the adsorption fitted well with pseudo-second order kinetic model, and that the intraparticle diffusion was not the only rate-controlling step. Moreover, the possible mechanisms of modification and adsorption could be suggested through the results of SEM, EDS and FTIR. This study revealed that PPAB is a promising and efficient adsorbent for MO dyes, and the synthesis of PPAB provided a deep understanding about recycling and utilizing wastes in wastewater treatment.

Optimization of parameters for maximizing photocatalytic behaviour of Zn1-xFexO nanoparticles for methyl orange degradation using Taguchi and Grey relational analysis Approach

In the current work, the Taguchi design of experiment and Grey relational analysis (GRA) was used to optimize various experimental parameters, such as mol% of Fe3+ doping, fuel, wt% of NH4Cl flux, calcination temperature for the preparation of Fe3+-doped zinc oxide (FZO) by solution combustion synthesis. The powder X-ray diffraction pattern of FZO exhibits that crystallite size is increasing with increase in calcination temperature and the band gap was found to decrease with increase in mol% of Fe3+. The surface morphology of FZO nanoparticles (NPs) studied using a scanning electron microscope was found to be distinctive structures such as cubic shape, irregular mesoporous particles, tiny clusters, large and spongy pores structure and so on. High-resolution transmission electron microscopy images, selected-area electron diffraction (SAED) pattern, and an energy-dispersive X-ray spectrum confirm the presence nanoscale FZO NPs, the polycrystalline nature and elemental composition. Various analyses, such as the signal-to-noise ratio ratio, analysis of variance (ANOVA) and GRA, were performed to validate the predicted optimal model. The ANOVA indicates that the crystallite size was significantly affected by calcination temperature with contribution factor 93.28%. Band gap energy was affected by both mol% of Fe3+ doping and calcination temperature with contribution 66.41% and 25.70%, respectively. Grey relational grading confirmed that the combination 5% doping, d-glucose fuel, 10% of flux and 600 °C calcination temperature can be used to get lower band gap energy (2.87 eV) and lower crystallite size (11.63 nm). Finally, Grey theory prediction helps us to choose a combination of 5% of doping, oxalic acid as a fuel, 5% of NH4Cl flux and 500 °C calcination temperature to obtain the required band gap of 2.61 eV and the crystallite size 10.12 nm. The FZO NPs were used for photocatalytic degradation of methyl orange (MO) dye. The photocatalytic degradation results showed that the MO dye removal rate efficiency is higher (82.30%) on the Grey theory prediction result as compared with other L9 orthogonal array.

Enhanced biosorption and electrochemical performance of sugarcane bagasse derived a polylactic acid-graphene oxide-CeO2 composite

Abstract In view of the methyl orange (MO) dye on everyday applications in the textile, food, leather, paper, printing, and pharmaceuticals industry, in addition to its toxic behaviour on human health, we have developed a biodegradable polylactic acid (PLA)-based cerium dioxide (CeO2)-graphene oxide (GO) composite by means of a sol-gel technique and tested its efficacy. For the study, the PLA polymer obtained is of renewable agriculture waste origin (sugarcane bagasse) and was isolated by means of fermentation of the feedstock followed by the polymerization of lactic acid. The instrumental techniques such as the powdered x-ray diffraction, scanning electron microscopy etc. were employed for the physical characterization of the material. The various parameters such as the kinetics, desorption, regeneration, pH, isotherm theories, and ionic strength were tested towards the adsorption of MO dye onto the surface of GO-PLA-CeO2 composite. The outcome of the study exhibited that the GO-PLA-CeO2 composite revealed promising behaviour for the dye removal, which was allocated to the efficacy of GO, PLA, and CeO2 properties. Also, the adsorption process of GO-PLA-CeO2 is completely dependent on the initial concentration of MO and the adsorption equilibrium fitted well with the Langmuir isotherm. In addition, the electrochemical characterization of the composite was studied by means of CV and impedance measurements. Based on the outcome of the results, it can be said that the GO-PLA-CeO2 composite may be applied as a suitable electrode material along with its efficient adsorption properties for the removal of MO dye from wastewater.

Synthesis, Characterization of α-Al2O3 Nanoparticles and Its Application in Decolorization of Methyl Orange Azo Dye in the Presence of UV Light

Present study deals with the sol-gel synthesis and application of α-Al2O3 nanoparticles (alumina) to decolorize the azo anionic dye methyl orange (MO). α-Al2O3 nanoparticles were successfully synthesized using aluminium oxide, 25% ammonia and polyvinyl alcohol (PVA) were used as low cost raw materials. The properties of synthesized nanoparticles were investigated by using UV-visible spectroscopy, XRD, FTIR, SEM, EDAX, Raman spectroscopy and TEM. From UV–visible spectra, band gap was calculated and it was found to be 3.31 eV. Average crystal size of α-Al2O3 nanoparticles from XRD peaks found to be 25 nm having rhombohedral structure. FTIR spectra reveals that functional groups (O-Al-O) are present. SEM image shows distribution pattern of α-Al2O3 nanoparticles. Chemical composition of α-Al2O3 nanoparticles was confirmed from EDAX spectroscopy measurement. Raman spectra showed crystalline nature of α-Al2O3 nanoparticles. The effect of concentration and pH of dye, dosage of nano adsorbent and contact time were studied. The systematic study shows that, successful color removal of methyl orange dye up to 54% in three hours contact time of pH 4. Hence α-Al2O3 nanoparticles can be used for dye removal from waste water. Industrialization of this technique will be cost effective way to decolorize the textile dye present in water system.

Removal of methyl orange over TiO2/polyacrylamide hydrogel

The present work describes the preparation of titanium oxide impregnated polyacrylamide hydrogel (TiO2/PAM) by in-situ polymerization technique. The prepared hydrogel was characterized by fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and x-ray diffraction (XRD) techniques. The physical properties (solvent content, swelling behaviour, porosity) of hydrogel were also studied by ASTM method. Further, results are revealing the formation of composite hydrogel with improved properties. Thus, obtained prepared hydrogel was used for removal of methyl orange dye from laboratory prepared water samples. The methyl orange removal efficiency and kinetics was evaluated by UV-Visible spectroscopy in different conditions. The results indicate the improvement in dye removal capacity due to impregnation of metal oxides in hydrogel matrix.

Adsorption properties of activated carbon fiber for highly effective removal of methyl orange dye

A commercial activated carbon fiber (ACF) was applied as efficient adsorbents for adsorption of methyl orange (MO) dye in aqueous solution. The surface morphology and surface area were characterized by scanning electron microscopy (SEM) and N2 adsorption, respectively. The results showed that ACF had good adsorption capacity on MO dye due to the large surface area and excellent pore size structure. In addition, the adsorption property of MO dye in aqueous solution onto ACF was investigated as a function of the initial dye concentration, pH value and temperature of solution. It’s observed that the adsorption capacity of ACF for MO dye increased with the increases in the initial dye concentration and the temperature of solution, but the pH value had no significant effect on ACF adsorption performance. Langmuir, Freundlich and Temkin isotherm models were employed to fit the equilibrium isotherm data, and the Langmuir model fitted the experimental data best implying the homogeneity of the adsorbent surface sites. Besides, thermodynamics parameters, Gibbs free energy ΔG0, entropy ΔS0 and enthalpy ΔH0, were calculated, and the values indicated that the phisisorption process of MO dye onto ACF was spontaneous, endothermic and attractive.

Synthesis of Co3O4 nanoparticles and their performance towards methyl orange dye removal: Characterisation, adsorption and response surface methodology

This research article describes the synthesis of cobalt-oxide nanoparticles by simple precipitation technique and their environmental application. The prepared Co3O4 nanoparticles were characterised by field emission scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, selected area diffraction, and energy-dispersive X-ray spectroscopy, along with elemental mapping analysis. The characterisation images revealed that as-synthesised nanomaterial had a hexagonal sheet-like morphology with average particle size 10–20 nm and was crystalline in nature. The nano-adsorbent displayed its efficiency in methyl orange adsorption from aqueous solution. Several adsorption factors such as pH, initial concentration, time, and temperature were examined, and isotherm, kinetic, and thermodynamic data were observed. The adsorption rate was fast and followed a pseudo–second-order kinetic model. The adsorption isotherm could be suited with both Langmuir and Freundlich isotherms. The adsorption process turned out to be spontaneous and exothermic. The effects of the various factors for methyl orange removal were analysed using the Box–Behnken design. A second-order quadratic model was used to project the response. Analysis of variance analysed the significance of the factors and their interactions. Three-dimensional response surface plots were used to determine the interactive effects of the independent factors on methyl orange adsorption capacity. The successful regeneration of Co3O4 nanoparticles suggested their usefulness in wastewater treatment and various other industrial settings. The reusability and efficient adsorptive capacity of nano-adsorbent for environmental management represent the importance of this work.