Adsorption Of Tartrazine Research Articles

Optimization of Tartrazine Adsorption onto Polypyrrole/SrFe12O19/Graphene Oxide Nanocomposite Using Central Composite Design and Bat Inspired Algorithm with the Aid of Artificial Neural Networks

This project was aimed to focus on the application of bat inspired algorithm with the aid of artificial neural networks (ANN-BA) as a novel metaheuristic algorithm in chemistry and environmental sciences for optimization of tartrazine dye adsorption onto the polypyrrole/SrFe12O19/graphene oxide (PPy/SrM/GO) nanocomposite from aqueous solutions. The PPy/SrM/GO nanocomposite was fabricated by an in situ polymerization process and its structural and magnetic properties were studied by means of several instrumental techniques. Four factors affecting adsorption process were optimized in a batch system by ANN-BA and central composite design (CCD). In comparison to the CCD, the ANN- BA model obtained through levenberg marquardt back propagation methodology, gave higher percentage removal (94 %) about 6 %. Under optimal conditions obtained by ANN-BA, the values of four factors including initial concentration, adsorbent dosage, pH, and shaking rate were 15 mg/l, 0.02 g, 6.5, and 297 rpm, respectively. In the above conditions, the experimental results were fitted well to the pseudo-second-order kinetic model with the rate constant (k2) of 0.038 g/mg/min and the Langmuir adsorption isotherm with monolayer maximum capacity (qm) of 123.5 mg/g with determination coefficients (R2) of 0.9986 and 0.9989, respectively. Thermodynamic studies revealed that tartrazine adsorption was spontaneous in all temperatures (ΔG 89), magnetic separable and reusable adsorbent (R%>50 after the sixth regeneration cycle) in environmental cleanup.

Preparation of MoS<sub>2</sub> nano-corals by hydrothermal method for adsorption of tartrazine in the aqueous medium

Corals-like molybdenum disulfide (MoS2) have been successfully synthesized via the hydrothermal method. The as-prepared MoS2 material with a high surface area of 83.9 m2.g-1 was used for the removal of tartrazine from an aqueous solution. The effects of parameters including contact time, MoS2 dosage, and solution pH on adsorption capacity were studied. The optimal dosage of MoS2 for removing tartrazine was 0.08 g and the removal efficiency of tartrazine reached 81.5 % for 100 min of adsorption. The adsorption kinetics studies were carried out using pseudo-first-order, pseudo-second-order, and intra-particle diffusion models. The results showed that the pseudo-second-kinetic model better described the adsorption kinetics of tartrazine on MoS2 and film diffusion was the rate-limiting step. In addition, the adsorption capacity of MoS2 was also performed with various organic dyes such as nile blue, janus green B, and congo red.

The effects of DMAEMA polyelectrolyte and TiO2 photocatalyst on the tartrazine quenching of N-doped carbon dot immobilized in PVA/microfibrillated cellulose film

The quenching of carbon dots (CDs) is affected by surface functional groups and other factors. Since CDs were also immobilized into thin films as a sensor, the effects of film properties on their photoluminescence should be investigated. In this work, N-doped CDs (NCDs) were immobilized in polyvinyl alcohol (PVA) thin films for tartrazine detection. Using a microwave-assisted hydrothermal method, amorphous NCDs were successfully produced. NCDs were blended into the PVA dope solution containing microfibrillated cellulose (MFC). An excessive amount of NCDs caused the undesired interaction and mutual reabsorption between the NCDs, resulting in self-quenching. Dimethylaminoethyl acrylate (DMAEMA) was added as copolymer to reduce the swelling ratio by about 50%. The reduction of water uptake subsequently reduced the tartrazine adsorption and the quenching of NCDs. Contradictory, the addition of TiO2 nanoparticles improved the tartrazine adsorption and the NCDs quenching. The thin film also exhibits photocatalytic properties for analyte removal. The linear ΔF and the unchanged absorbance spectra of PVA/DM3/NCD/TiO2 thin film indicate dynamic quenching at low tartrazine concentration (< 10 µM), attaining a limit of detection of 4.66 µM. The overlapping spectrum between the analyte absorbance and NCDs film emission spectra showed possible inner filter effects or fluorescence resonance energy transfer quenching mechanism.

Preparation of flower‐like Cu2O/ZnO for removal of dyes from aqueous medium

AbstractFlower‐like Cu2O/ZnO was prepared by hydrothermal method with the reducing agent of glucose for removal of dyes in aqueous medium. As‐prepared samples were characterized by FE‐SEM, XRD, and TEM. Flower‐like Cu2O/ZnO could both photodegrade Tartrazine (TA) under UV and visible lights with the removal efficiencies of 85.3 and 96.1 %, respectively, and adsorbed TA with the removal efficiency of 77.5 %. The effects of adsorbent dosage, dye concentration, and pH solution on adsorption of dyes were investigated. The kinetic adsorption of TA on flower‐like Cu2O/ZnO was studied by pseudo‐first‐order and pseudo‐second‐order models. In addition, the performance of as‐prepared material was evaluated by cyclic test and adsorption of other dyes such as methylene blue, Janus green B and Congo red.

Direct solid-phase spectrophotometric determination of tartrazine in soft drinks using β-cyclodextrin polymer as support

A sensitive and new solid-phase spectrophotometry for the determination of tartrazine in soft drinks has been developed. In this method, β-cyclodextrin epichlorohydrin polymer (β-CDP) of 60-80 mesh, which has less background absorbance in ultraviolet and visible region compared to other ion-exchanger resins, was used to support direct adsorption of tartrazine from aqueous solutions to form a solid complex (tartrazine-β-CDP complex). The effects of pH, temperature, time and ionic strength on the β-CDP including tartrazine were determined. The optimum conditions were obtained (pH, 1.0; temperature, 20℃; time, 40 min). The method was applied for the direct solid phase spectrophotometric determination of tartrazine in soft drink samples at the maximum absorption wavelength of 435 nm with satisfactory results.

Study of the Adsorption of Methylene Blue and Tartrazine in Aqueous Solution by Local Materials of Cameroonian Origin

The present work concerns the study of the adsorption of methylene blue (MB) and tartrazine (TAR) in aqueous solution by the raw clay (AB) and bridged clay (AP) of Boboyo. Studies show that the adsorption of these two dyes on both adsorbents is very fast. The adsorption equilibrium time is 25 minutes for AB for both adsorbates and 15 and 30 minutes for TAR and BM on AP, respectively. The maximum adsorbed amounts of BM are of the order of 4.49mg/g on AB and 4.39mg/g on AP. They are of the order of 2.43mg/g on AB and 2.64mg/g on AP for TAR. The experiments show that the adsorbed quantity of these two dyes decreases with the increase of the mass of the adsorbents, is maximum at pH = 3 and increases with the increase of the initial concentration of the two dyes. The modeling of the adsorption kinetics reveals a conformity to the pseudo-second order model for the two dyes studied on adsorbent disputes. Experimental results are better described with the Freundlich isothermal model. The thermodynamic parameters showed that the adsorption of the two dyes is favorable and endothermic.

Adsorption of dyes brilliant blue, sunset yellow and tartrazine from aqueous solution on chitosan: Analytical interpretation via multilayer statistical physics model

This study reports the statistical physics modeling of the adsorption of three dyes brilliant blue (BB), sunset yellow (SY) and tartrazine (TT) on chitosan from aqueous solution. A multilayer statistical physics model was applied to understand the dye adsorption at different temperatures (i.e., 298–328 K) and pH 3. Modeling results showed that the adsorption was performed with a horizontal position of BB, SY, and TT molecules on the chitosan surface. Dye adsorption capacities ranged from 406.19 to 814.27 mg/g for BB, from 924.88 to 1432.98 mg/g for SY and from 611.27 to 1065.55 mg/g for TT, respectively. Overall, the chitosan showed the highest adsorption capacities for dye SY (Q0 (SY-chitosan) > Q0 (TT- chitosan) > Q0 (BB- chitosan)). The analysis of adsorption energies indicated that the removal of these dyes was an exothermic physisorption process, which could be governed by steric parameters according to the results obtained with the multilayer statistical physics model. This study contributes with new theoretical and experimental findings of the dye adsorption using natural polymers.

Facile synthesis of polyamidoamine dendrimer gel with multiple amine groups as a super adsorbent for highly efficient and selective removal of anionic dyes

Preparation of excellent dye adsorbent that simultaneously displays convenient separation capability, high adsorption capacity, fast removal rate, superior adsorption selectivity, and favorable reusability remains a challenge. Herein, we present a simple and feasible one-step method to prepare amine-rich porous polyamidoamine (PAMAM) dendrimer gel adsorbent. The PAMAM gel could be readily separated from water by filtration. The adsorption properties of PAMAM gel was systematically examined by adsorption of anionic methyl orange (MO) and tartrazine (TTZ) dyes. The PAMAM gel exhibited superior adsorption selectivity and removal efficiency towards anionic MO and TTZ dyes. The adsorption process could be completed within around 15 min and presented fine correlation with Langmuir isotherm and pseudo-second-order kinetic models. The maximum adsorption capacity of PAMAM gel towards MO and TTZ was as high as 680.2 mg g−1 and 689.7 mg g−1, respectively. Additionally, the dye-adsorbed PAMAM gel could be readily desorbed in alkaline solution. Considering the simple synthetic process and outstanding adsorption performance of PAMAM gel, this paper provides an effective approach to prepare high-performance anionic dye adsorbents.

Lanthanum enriched aminosilane-grafted mesoporous carbon material for efficient adsorption of tartrazine azo dye

Abstract For the first time the synthesis of mesoporous carbon of cubic structure modified with 3-aminopropyltriethoxysilane and lanthanum chloride, and its ability to remove tartrazine azo dye from aqueous solutions, have been described. The physicochemical properties of the adsorbent were characterized by X-ray diffraction, low-temperature nitrogen sorption, transmission electron microscopy, FT-IR spectroscopy and Boehm titration. The carbon functionalization was found to significantly change its porosity, structure ordering and acid-base character of its surface. The effect of different key parameters such as contact time, temperature, initial concentration and pH of azo dye solution on the effectiveness of tartrazine adsorption was evaluated. Sorption capacity of mesoporous material was found to increase with increasing initial dye concentration and contact time but decreases with increasing temperature of the system, from 25 to 60 °C. The effectiveness of tartrazine removal by La/CKIT-6-A material was compared with that of pristine carbon (CKIT-6) and the aminosilane-grafted sample CKIT-6-A. The introduction of lanthanum on the surface of sample functionalized with 3-aminopropyltriethoxysilane increased its sorption capacity towards tartrazine. The best fit to experimental data was obtained for the Langmuir isotherm model, suggesting homogeneous distribution of adsorption sites on the surface of mesoporous carbon. The adsorption kinetic data were well described with the pseudo-second-order kinetic model. On the basis of the detail analysis of the interactions between the carbon material and tartrazine, a mechanism of dye adsorption was proposed.

Thermodynamics of adsorption of food colours

Thermodynamics of adsorption of two synthetic food colours, Tartrazine and Brilliant blue, was investigated. The adsorbent used was activated carbon, produced from saw dust waste. For each of the food colours, equilibrium studies were carried out at different temperatures (308 K, 318 K, 328 K and 338 K). The Langmuir adsorption model was employed for equilibrium studies. Amount of colour adsorbed per gram of adsorbent, at equilibrium, was influenced by molecular size of adsorbate and temperature. Adsorption at the tartrazine-adsorbent interface was exothermic, while that at the brilliant blue-adsorbent interface was endothermic. Adsorption of tartrazine was associated with a negative entropy change, while there was increased degree of disorderliness at the brilliant blue-adsorbent interface. Each of the adsorbate-adsorbent systems was associated with positive change in Gibbs free energy, within the range of temperature employed in this work.

Preparation of MgO for Removal of Dyes and Heavy Metal from Aqueous Solution: Facially Controlling the Morphology, Kinetic, Isotherms and Thermal Dynamic Investigations

Objectives: The current study was focused on preparation of MgO with the different morphologies for enhanced removals of dyes and heavy metal from wastewaters. Methods/Statistical Analysis: The MgO samples were synthesized by a facile precipitation method with the calcination temperature of 500 °, its morphology was controlled by altering the concentration of K 2 CO 3 and Mg(NO 3 ) 2 . As-prepared samples were characterized by TGA, XRD, N 2 adsorption/desorption isotherm, FT-IR, FE-SEM and TEM. The performance of as-prepared MgO samples was evaluated by adsorptions of dyes and leads (II) and compared to those of commercial MgO (CM-MgO) and Activated Carbon (AC). Findings: Flower-like MgO (F-MgO) had the high surface area and pore volume (232 m 2 /g and 0.575 cm 3 /g, respectively) as compared to rod-like MgO (R-MgO) and CM-MgO. The adsorption rate and adsorption capacity of tartrazine on F-MgO were faster and larger, respectively, than those of R-MgO, CM-MgO and AC. The adsorption of F-MgO was achieved equilibrium in 15 min and the adsorption capacity was 65.8 mg/g at the MgO dosage of 0.12 g, initial tartrazine concentration of 50 mg/L, solution pH of 7.0, and temperature of 30 °C. The adsorption rate was followed the pseudo second equation and the rate constant was 0.02 g.mg –1 .min –1 at 30 °C. The heat of adsorption (ΔH° = 19.48 kJ/mol) confirmed the exothermic adsorption of tartrazine and the negative values of G°indicatedthe spontaneous adsorption. The removal efficiency of tartrazine was gradually decreased, but it still remained at 95.2% for the fifth cyclic experiment. In addition, the removal efficiency of Pb (II) on MgO/tartrazine (95%) was much larger than that of F-MgO (about 10%). Application/Improvements: This study gives promising results in concern with treatment of industrial wastewaters before they are charged into the environment.

Crossed mixture‐process design for optimization of simultaneous adsorption of Tartrazine and Indigo carmine dyes by cobalt hydroxide nanosorbent

AbstractThe present paper focused on the removal of Tartrazine and indigo carmine from aqueous solutions by cobalt hydroxide nanosorbent. This novel and efficient nanosorbent were successfully used to remove two anionic dyes from aqueous solutions in single and binary systems. The characterization of sorbent was carried out with scanning electron microscopy micrographs, X‐ray diffraction, and Fourier transform infrared spectroscopy analysis. The simplex‐lattice mixture design was employed for optimization of adsorption process. The effective factors on adsorption such as pH, m (amount of sorbent), and C (initial concentrations of dyes) were considered using crossed mixture‐process design. The proposed quadratic model resulted from the mixture design approach fitted very well to the experimental data. Isotherm modeling and kinetic investigations showed that sips, modified sips, and pseudo‐second‐order models describe both the adsorption equilibrium and kinetic behavior well, respectively.

Azo dyes adsorption in fixed bed column packed with different deacetylation degrees chitosan coated glass beads

Chitosan with different deacetylation degrees (DD) was used to coat glass beads by dip coating technique, and the coated beads were applied in fixed bed adsorption of tartrazine and sunset yellow from aqueous solutions. Chitosan DD 85% was the best adsorbent in relation to the coating and bed performance for dye adsorption. The adsorption capacity increased with temperature increase as demonstrated by the equilibrium isotherms, which were performed in batch assays using chitosan coated glass beads; the data were suitably fitted by BET model (R2 > 0.95 and ARE < 5%). The best performance attained in the fixed bed assays was using chitosan DD 85%, being the breakthrough time of 90 min, the column maximum adsorption capacity around 60 mg g−1 and removal percentage of 50.4%. The breakthrough curves were well represented by Yoon–Nelson model (R2 > 0.95 and ARE < 10%). The elution efficiency was of 82% in the fourth adsorption–desorption cycle.

Adsorption of tartrazine from an aqueous solution by octadecyltrimethylammonium bromide-modified bentonite: Kinetics and isotherm modeling

A modified bentonite was prepared at different surfactant (ODTMA) loadings through ion exchange. The obtained organobentonite adsorbent materials were then used for the removal of an anionic dye, tartrazine, from an aqueous solution. The bentonite was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, and Brunauer- Emmett-Teller (BET) method. The modification of organophilic bentonite by ODTMA increases the basal spacing d 001 from 24.1 to 39.1 Å when the cation exchange capacity increases from 1 to 4. The increase in the spacing, due to the basic organic modifications, was confirmed by the results of thermogravimetric analysis, Fourier transform infrared spectroscopy, and BET. The effects of contact time, initial concentration, and solution pH onto an adsorbed amount of tartrazine were investigated. To predict adsorption isotherm, the experimental data were analyzed using the Langmuir and Freundlich isotherm equations. It was determined that the isotherm data were fitted to the Langmuir isotherm. The adsorption process was also found to follow a pseudo-second-order kinetic model.

Equilibrium, Kinetic and Optimization Studies for the Adsorption of Tartrazine in Water onto Activated Carbon from Pecan Nut Shells

A series of experimental studies has been carried out using a novel, sustainable adsorbent to remove Tartrazine dye, namely, a steam activated carbon obtained from pecan nut shells. The dye also known as acid yellow 23 has been used in the food industry but is now classified as a carcinogen. The experimental equilibrium data has been used to test four equilibrium isotherm models and then the best fitting model was optimised to minimise the mass of adsorbent used to save costs in industrial applications using a two-stage batch adsorption system. The experimental contact time data has also been modelled and the best fit model has been used to optimise/minimise the contact time for a range of process conditions.

Removal of Tartrazine from Aqueous Solution by Adsorption on Activated Red Mud

In this study, activated red mud was used to develop an effective adsorbent in order to remove a toxic azo dye (tartrazine E102) from aqueous solutions. To increase the adsorption capacity, the red mud was activated by acid-heat treatment using 20 wt.% HCl (RM-HCl). To establish the optimum operating parameters, the influence of pH, adsorbent dose, contact time, initial dye concentration, and stirring rate was investigated. The adsorption equilibrium was studied using Langmuir, Freundlich, Dubinin-Radushkevich, Temkin isotherm models, and the characteristic parameters for each adsorption isotherm were determined. The kinetics of the adsorption process was analyzed by means of pseudo-first-order and pseudo-second-order models. The maximum removal efficiency obtained under optimum conditions was 84.72%. These results were in accordance with the isotherm and kinetic data. The results suggested that tartrazine adsorption process follows the pseudo-second-order kinetic model and also that fits Langmuir isotherm model. The maximum monolayer adsorption capacity was 136.98 mg/g.

Hydrogel beads based on oxidized corn starch cross-linked with gelatin for tartrazine adsorption from aqueous environments

The adsorption approach is considered as the most effective method of removing dyes from effluents, which among new synthetic materials become high-profile as adsorbents in recent years. This work provides a noble synergistic hydrogel beads based on oxidized corn starch (OCS) and gelatin (G). The OCS and G can form three-dimensionally cross-linked networks owing to Schiff’s base formation. This work also proved that the form of hydrogel beads can be implemented in the synergistic materials for removing dyes from effluents, which has so far been neglected in the literature.

Synthesis of water-dispersible poly-l-lysine-functionalized magnetic Fe3O4-(GO-MWCNTs) nanocomposite hybrid with a large surface area for high-efficiency removal of tartrazine and Pb(II)

In this study, a novel, effective and environment-friendly methods was used to prepare poly-l-lysine (PLL)-functionalized magnetic Fe3O4-(GO-MWCNTs) hybrid composite with large surface area and abundant hydroxyl and amino groups. The as-prepared PLL-Fe3O4-(GO-MWCNTs) nanocomposite was systematically characterized by FT-IR, XRD, TGA, SEM, TEM, VSM and EDX. The PLL-Fe3O4-(GO-MWCNTs) hybrid composite exhibited excellent adsorption performance for the removal of a dye (tartrazine) and a heave metal (Pb(II)). The result showed that adsorption of Pb(II) reached equilibrium in 30min and adsorption of tartrazine reached equilibrium in approximately 60min. Most importantly, PLL-Fe3O4-(GO-MWCNTs) hybrid possesses high adsorption capacity, rapid separation, and less time-consuming. The equilibrium adsorption capacity was 1038.42mgg−1 for Pb(II) and 775.19mgg−1 for tartrazine under the optimal conditions. These two pollutants removal were found to obey Langmuir adsorption model, while the kinetics of adsorption followed pseudo-second-order kinetic model. A possible adsorption mechanism has been proposed where the chelation between PLL and Pb(II) or electrostatic interaction between GO and tartrazine. These results demonstrated the potential applications of PLL-Fe3O4-(GO-MWCNTs) hybrid composite in deep-purification of polluted water.

Pre-concentration and determination of tartrazine dye from aqueous solutions using modified cellulose nanosponges

In this study, a new absorbent based on cellulose nanosponges modified with methyltrioctylammonium chloride (aliquat 336) was prepared and used for pre-concentration, removal and determination of tartrazine dye, using UV–vis spectrophotometry. This adsorbent was fully characterized using various instrumental techniques such as SEM, FTIR and XRD spectra. The pre-concentration and removal procedures were studied in column and batch modes, respectively. The effects of parameters such as pH of the aqueous medium, methyltrioctylammounium chloride dose, adsorbent amount, desorbing conditions and interfering ions on the adsorption of tartrazine were investigated and optimized. The fitting experimental data with conventional isotherm models revealed that the adsorption followed the Brunauer-Emmett-Teller (BET) model and the maximum adsorption capacity for tartrazine was 180mg/g with modified nanosponges. Under the optimized conditions, the calibration curve was linear over the range of 2–300ng/mL and the limit of detection was 0.15ng/mL. The relative standard deviation (RSD) for 20 and 100ng/mL of tartrazine were 3.1% and 1.5%, respectively. The proposed method was applied for pre-concentration and determination of tartrazine dye in different water samples.

Surface Behavior of Rhodamin and Tartrazine on Silica-Cellulose Sol-Gel Surfaces by Thin Layer Elution

Physical and chemical interactions are the principles for different types of separation systems as the equillibrium dynamics on surface plays a key-role. Surface modification is a way for selective separation at interfaces. Moreover, synthesis of gel silica by a sol-gel method is preferred due to the homogeneity and surface feature easily controlled. Cellulose can be added in situ to modified the silica features during the process. Further application for to study interaction of rhodamin and tartrazine in its surface and their solubilities in mobile phase explains the possibility for their separation. This paper devoted to evaluate the surface behavior in term of adsorption and desorption of tartrazine and rhodamin on silica-cellulose thin layer in different mobile phase. Some carrier liquids applied such as methanol, acetone, n -hexane and chloroform. The result proves tartrazine and rhodamin is separated and have different behavior in different mobile phase. The retardation factors (R f ) of the mixtures suggest complexity behavior on silica-cellulose surface.