Showing papers on "Brilliant green published in 2018"
TL;DR: In this paper, the photocatalytic efficiency of cobalt tungstate nanoparticles was estimated by monitoring the degradation of brilliant green dye under visible light irradiation, which showed that approximately 94% of the green dye was degraded within 120 min of visible light illumination.
71 citations
TL;DR: In this work, an environmentally friendly gum ghatti-crosslinked-polyacrylamide (Gg-cl-PAAM) hydrogel was synthesized using a microwave-assisted grafting technique, and tested for use in water purification applications as an adsorbent and flocculent.
69 citations
TL;DR: Intensive removal of the dyes by biomass immobilized on the washer corresponded to a significant decrease in phytotoxicity and a slight decrease in zootoxicity of the dye solutions.
69 citations
TL;DR: In this paper, the adsorption mechanism of Brilliant Green (BG) and acid red 1 (AR1) dyes was analyzed at different temperatures (from 303 to 343 K) in order to understand the formation of two different adsorbed layers and a variable number of layers.
56 citations
TL;DR: A mycoremedial study was undertaken for decolourization of synthetic dyes using wood rot fungal culture Lenzites elegans WDP2, and phase contrast microscopy clearly revealed bio-sorption of the dyes byfungal culture into the mycelium/spores in the photomicrographs.
53 citations
TL;DR: An ecofriendly, water-stable metal-organic framework prepared from a derivative of the natural amino acid l-serine, which enables highly efficient water remediation by capturing more than 90 % of dye content, even at very low concentrations such as 10 ppm, which is similar to those usually found in industrial wastewaters.
Abstract: The presence of residual organic dyes in water resources or wastewater treatment systems, derived mainly from effluents of different industries, is a major environmental problem with no easy solution. Herein, an ecofriendly, water-stable metal-organic framework was prepared from a derivative of the natural amino acid l-serine. Its functional channels are densely decorated with highly flexible l-serine residues bearing hydroxyl groups. The presence of such a flexible and functional environment within the confined environment of the MOF leads to efficient removal of different organic dyes from water: Pyronin Y, Auramine O, Methylene Blue and Brilliant Green, as unveiled by unprecedented snapshots offered by single-crystal X-ray diffraction. This MOF enables highly efficient water remediation by capturing more than 90 % of dye content, even at very low concentrations such as 10 ppm, which is similar to those usually found in industrial wastewaters. Remarkably, the removal efficiency is improved in simulated contaminated mineral water with multiple dyes.
39 citations
TL;DR: This method provides a new pathway to achieve high efficiency removal of dyes and metal ions from wastewater and can reach the National Standard for dyeing and finishing of textile industry of China after three cycles in a continuous filtration-adsorption system.
32 citations
TL;DR: In this paper, a magnetic zinc ferrite-chitosan (ZFN-CS) bio-composite was used as an adsorbent to remove crystal violet and brilliant green dyes in single and binary systems.
Abstract: Nowadays, biopolymers are widely used to modify the surface of ferrites because of their unique properties such as high adsorption capacity, selectivity, bio-compatible, eco-friendly and cost-effective nature. Therefore, this study involves the development of novel recyclable magnetic zinc ferrite–chitosan (ZFN–CS) bio-composite under ambient environmental conditions and used as adsorbent to remove crystal violet and brilliant green dyes in single and binary systems. The bio-composite’s surface morphology and characterization was characterized by using different techniques like fourier transform infra-red, X-ray diffraction, transmission electron microscope, energy dispersive spectra, BET, X-ray photoelectron spectroscopy, differential thermal and thermo gravimetric analysis and pH point zero charge (pHzpc). The adsorption kinetics and isotherm studies at different temperatures of magnetic bio-composite in single as well as binary dye systems revealed that zinc ferrite–chitosan might serve as a suitable eco-friendly adsorbent for the removal of dyes in single as well as binary systems. Also, the regeneration ability of magnetic bio-composite was studied in both dye systems for five successive cycles which showed good reusability of the ZFN–CS composite. The present investigation concluded that magnetic ZFN–CS composite might be suitable and cost effective alternative for the removal of dyes in single as well as binary dye systems.
32 citations
TL;DR: In this paper, cellulose was chemically modified through the addition of metaphosphoric acid in order to obtain a new material (MPCel) with higher adsorptive properties than the starting material.
28 citations
TL;DR: Sample preparation based on the quick, easy, cheap, effective, rugged and safe extraction combined with the IL-DLLME method and zero crossing first derivative spectrophotometric detection was applied for the simultaneous analysis of BG and CV in fish and water samples with quantitative recoveries.
27 citations
TL;DR: Results of the study showed that water from polluted river as well as municipal wastewaters may be a precious source for isolation of bacterial strains with the wide spectrum and high decolorization potential.
Abstract: The aim of this study was the isolation of bacterial strains which have the ability to decolorize synthetic dyes belonging to different chemical groups. The samples for bacterial isolation were collected from aqueous environments—two activated sludges and polluted local river. At the first stage of screening (performed on the solid media supplemented with two dyes—azo Evans blue or triphenylmethane brilliant green), 67 bacterial strains were isolated capable to decolorize the used dyes. In the further study, six dyes with different chemical structures were used: fluorone dyes (Bengal rose, erythrosine), triphenylmethane dyes (brilliant green, crystal violet), azo dyes (Evans blue, Congo red). Initial concentration of each of these chemicals in samples was 0.1 g/l. Obtained results showed that only 31 isolates were able to decolorize all six used dyes (with different efficiencies). Among them, 11 strains were isolated from the river (55% of isolates from this site) and 20 from activated sludges collected from two different treatment plants (15 from the first water treatment plant and 5 from the second which were 42 and 43% of isolated cultures respectively). The decolorizing microorganisms are mostly isolated from different industrial sewages (e.g., textile industry), but results of the study showed that water from polluted river as well as municipal wastewaters may be a precious source for isolation of bacterial strains with the wide spectrum and high decolorization potential. In general, there were no statistically significant differences between decolorization abilities of strains isolated from different sites. The group of dyes that was removed with the highest yield was triphenylmethanes (75.6%), followed by fluorones (70.0%) and azo group (60.9%). The analysis of decolorization efficiency of the individual dyes revealed the best removal results in case of triphenylmethane brilliant green (average removal 85.7%), followed by fluorone erythrosine (average removal 78.9%), triphenylmethane crystal violet (average removal 65.5%), azo Evans blue (average removal 64.4%), fluorone Bengal rose (average removal 61.0%), and azo Congo red (average removal 57.4%). Obtained results revealed that the dye susceptibility to decolorization depends on the characteristic chemical structure of given dye groups but more important is chemical structure of strictly given dye within the group.
TL;DR: In this article, the synthesis of a novel biocomposite (LGB/St/Al2O3) by coupling between lignin of guava stem, stearic acid and alumina was focused on the removal of dyes from wastewater.
Abstract: Biosorbent has excellent properties for the removal of dyes from wastewater but the leaching of its components in acidic and alkaline medium is a problem which necessitates preparing stable composite to overcome the leaching process. This paper focused on the synthesis of a novel biocomposite (LGB/St/Al2O3) by coupling between lignin of guava stem, stearic acid and alumina. LGB/St/Al2O3 was characterized using ultra violet/visible/infrared spectra, scanning electron microscope, x-ray diffraction and thermal analysis. The LGB/St/Al2O3 was tested for removing of the brilliant green dye (Br.G) from wastewater; the various parameters like Br.G concentration, pH, temperature and shaking time were studied to optimize the best condition for removing of Br.G from aqueous solution. It was found that Br.G was removed 100% in pH range 3–9 with shaking 5 min at room temperature. The pseudo-second order model best described the kinetics for removal of Br.G (R2 = 0.999) with initial rate constant 0.1 mmol/g min. The equilibrium process is well described by the Freundlich isotherm model (R2 = 0.978), which attributed to the heterogeneous surface of LGB/St/Al2O3. Value of ΔG was -2.0 kJ mol −1, this indicate the spontaneous nature of the removal process. The method exhibited a detection limit of 2.7–6.7 μg/L in wastewater samples with RSD of 1.2–3.2% (n = 5). It is indicate that LGB/St/Al2O3 would find important application for removal of basic dyes from wastewater, owing to the advantages of high efficiency, low cost and environmental friendliness.
TL;DR: In this article, undoped and nickel doped SnO2 nanoparticles were synthesized by simple chemical precipitation method and their characterized by thermo gravimetric and differential thermal analysis.
Abstract: In this work, undoped and nickel doped SnO2 nanoparticles were synthesized by simple chemical precipitation method and their characterized by thermo gravimetric and differential thermal analysis, X-ray diffraction, X-ray photoelectron spectroscopy, UV–Visible diffuse reflectance spectroscopy, photoluminescence spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy with energy-dispersive spectrum and transmission electron microscopy. The results indicated that the structural analysis show the tetragonal rutile phase form of SnO2 at 410 °C for 2 h. Optical measurements indicated a red shift in the absorption band edge after Ni doping. A decrease of PL emission of Ni doped SnO2 compared to the SnO2 nanoparticles. The photocatalytic activity of undoped and Ni doped SnO2 nanoparticles were evaluated in the degradation of brilliant green (BG) solution under sunlight irradiation. The various experimental parameters such as amount of catalyst, contact time for efficient dye degradation of BG were concerned in this study. The results showed that Ni doped SnO2 nanoparticles enhanced the photocatalytic activity than SnO2 nanoparticles and inhibition of the electron–hole pair’s recombination.
15 Jun 2018
TL;DR: In this article, the capability of rice straw and rice straw ash to remove brilliant green dye by the adsorption process has been studied, at different initial dye concentrations, contact time and adsorbent dosages.
Abstract: Aims: The use of economical, simply obtained and green adsorbents has been employed as a perfect alternative to the expensive methods of removing dyes from aqueous solution. The capability of rice straw and rice straw ash to remove brilliant green dye by the adsorption process has been studied.
Study Design: Adsorption studies were carried out at different initial dye concentrations, contact time and adsorbent dosages.
Place and Duration of Study: Regional center for food and feed, Agricultural research center.
Methodology: Adsorption data were modeled using Langmuir, Freundlich, Temkin adsorption isotherms.
Results: Freundlich model showed the best fit with the equilibrium data for rice straw; however Langmuir model was better fitted for rice straw ash. Kinetic adsorption records were modeled using pseudo-first-order and pseudo-second-order. It was found that pseudo-second-order was best fit with the equilibrium data. Rice straw and rice straw ash were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM).
Conclusion: Rice straw as an agriculture waste by-product could be used as an alternative to commercial activated carbon as adsorbent due to its availability, removal efficiency and low cost.
TL;DR: In this paper, the authors describe the successful synthesis of a new magnetic nanocomposite and investigate simultaneous removal of 2 cationic dyes, brilliant green (BG) and malachite green (MG), from aqueous solutions.
Abstract: Here, we describe the successful synthesis of a new magnetic nanocomposite and investigate simultaneous removal of 2 cationic dyes, brilliant green (BG) and malachite green (MG), from aqueous solutions. The nanocomposite is characterized by scanning electron microscopy , energy‐dispersive X‐ray spectroscopy, thermal gravimetric analysis, and Fourier‐transform infrared spectrophotometry. The spectra of BG and MG in their mixture show severe overlapping. Therefore, partial least square (PLS) regression is applied for simultaneous determination of target dyes. The original and first derivative spectra of the binary mixtures are used to perform the optimization of the calibration matrices by the PLS method. According to statistical values, PLS on first derivative spectral data has given better results with respect to the original data. The coefficients of determination (R2) for the test data set were 0.998 and 0.9996; root mean square error of prediction values for BG and MG were 0.12 and 0.19, respectively. Furthermore, adsorption kinetics and effects of various variables such as solution pH, adsorbent amount, and initial dye concentration are investigated. Under optimized conditions (adsorbent mass, 0.08 g; solution pH, 8; and contact time, 60 min), equilibrium experimental data are represented by Langmuir, Freundlich, and Sips isotherms. Results briefly show that adsorption of dyes by nanocomposite obeys pseudo–second‐order kinetic model and Sips isotherm.
TL;DR: In this paper, the conversion of orange peels into green adsorbent was done by direct sunlight without using any chemical treatment, and the adsorption study was carried with three different dyes namely, brilliant green, methyl violet, and solochrome black.
DOI•
01 Jun 2018TL;DR: In this paper, the simultaneous determination of Brilliant green (BG) and Crystal violet (CV) dyes with overlapped absorption spectra in binary mixture solution, was carreared out using the partial least squares (PLS) and direct ortogonal signal correction-partial least squares method.
Abstract: In the present work, the simultaneous determination of Brilliant green (BG) and Crystal violet (CV) dyes with overlapped absorption spectra in binary mixture solution, was carreid out using the partial least squares (PLS) and direct ortogonal signal correction-partial least squares (DOSC-PLS) methods. The results obtained indicate that by applying DOSC on the calibration and prediction data for each dye, the prediction errors are significantly minimized. Walnut shell, as an abundant lignocellulosic agricultural waste, was modified using NaOH, and subsequently characterized by the Fourier transform-infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), and BET techniques. The potential application of the prepared adsorbent for the removal of the cited dyes was investigated. The effects of the experimental parameters such as the initial pH, adsorbent dosage, initial dye concentration, and contact time on the adsorption efficiency in the single solutions and their binary mixture are studied. The optimum experimental conditions were found to be 0.8 g/L of the adsorbent at room temperature, pH 7.0, and a contact time of 13 minutes. These advantages make it appropriate for dye removal. The analysis data shows that the Langmuire isotherm can satisfactorily explain the equilibrium data. The maximum adsorption capacity (qm) for BG and CV in their single solutions was found to be 146.40 and 123.2 mg/g, respectively, whereas these values for their binary mixture were 79.07 and 96.01 mg/g, respectively. The exhausted NMWNS was regenerated using a dish-washing liquid and reused for removal of the cited dye species from aqueous solutions.
02 May 2018
TL;DR: In this article, a green approach for the preparation of medicinally and chemically important nanoparticles has been investigated, where x-ray diffraction and transmission emission microscopy (TEM) studies were performed to characterize the nanoparticles.
Abstract: Eco-friendly synthesis of nanoparticles is the need of the society today. Present study has been undertaken to investigate the greener approach for the preparation of medicinally and chemically important nanoparticles. Tea waste has been taken to synthesis silver nanoparticles. The nanoparticles are characterized by x-ray Diffraction, and Transmission Emission Microscopy studies. The particle size varied from 2 to 34 nm. These silver nanoparticles were evaluated for their reducing activity against four organic dyes viz crystal violet, methylene blue, Congo red and brilliant green. The particles exhibited good catalytic activity against crystal violet, methylene blue and brilliant green but no activity was visible for Congo red. Furthermore, AgNPs shows very promising and prominent antioxidant activity.
TL;DR: In this article, an Nd doped ZnO (1-5%) photocatalyst was successfully synthesized via chemical co-precipitation method and the optical properties, nature, and morphology of the synthesized nanoparticles were analyzed by UV-Visible, XRD, and FESEM respectively.
Abstract: An Nd doped ZnO (1-5%) photocatalyst was successfully synthesized via chemical co-precipitation method. The optical property, nature, and morphology of the synthesized nanoparticles were analyzed by UV-Visible, XRD, and FESEM respectively. XRD study reveals that Nd has been effectively incorporated in the ZnO lattice in the lower level dosage; however, the crystalline nature has been distorted towards the increase in the Nd. The selected brilliant green dye was degraded photo-catalytically with the help of the synthesized nanoparticles and the study has been extended with catalyst dosage and dye concentration. The 2% Nd-doped ZnO showed a remarkable result of 98.26% degradation of brilliant green dye compared to the other 1,3,4 & 5 % Nd-doped ZnO nanoparticles which clearly indicates the optimization of depletion region corresponding to the maximum degradation. The increased content (3-5%) of Nd-doped ZnO exhibited moderate photocatalytic degradation of the dye due to the decreased crystalline nature which was further evidenced from XRD studies.
06 Oct 2018
TL;DR: In this article, the ability of Nephelium mutabile (Pulasan) leaves (PL) in removing toxic brilliant green (BG) dye using the adsorption method was investigated.
Abstract: The main objective of this study is to investigate the ability of Nephelium mutabile (Pulasan) leaves (PL) in removing toxic brilliant green (BG) dye using the adsorption method. Batch experiments were conducted on the adsorption of BG dye using PL with a contact time of 3.5 h. Adsorption isotherm studies were analysed using six isotherm models, namely Langmuir, Freundlich, Temkin, Dubinin-Radushkevich (D-R), Redlich-Peterson (R-P) and Sips, and the results showed that Sips is the model that best fits the experimental data, with a maximum adsorption capacity (amax) of 130.3 mg g-1. The point of zero charge (pHPZC) of PL was found to be at pH 5.29. Regeneration studies showed that PL can be recovered and reused, especially after treatment with NaOH. This study demonstrates that PL can be considered as a reasonably good and cost-effective biosorbent for BG under our experimental conditions.
TL;DR: In this article, a new and simple method for the determination of trace amounts of brilliant green was developed by coacervative extraction and spectrophotometry, which is based on the extraction of Brilliant green with coacervates made up of sodium dodecyl sulfate as an anionic surfactant, in the presence of saturated NaCl solution.
Abstract: A new and simple method for the determination of trace amounts of brilliant green was developed by coacervative extraction and spectrophotometry. The method is based on the extraction of brilliant green with coacervates made up of sodium dodecyl sulfate as an anionic surfactant, in the presence of saturated NaCl solution. The effect of various experimental parameters such as pH of solutions, concentration of surfactant and concentration of salt was investigated using central composite design based on response surface methodology. Under the optimum conditions the calibration graph was linear in the range of 0.03–2.2 µg mL−1 with a detection limit of 0.012 µg mL−1. The relative standard deviation for seven replicates of 1.2 µg mL−1 brilliant green was 1.75%. The proposed method was successfully applied for the determination of brilliant green in different real samples including fish farming water, river water and tap water samples.
TL;DR: In this article, water treatment sludge from the water treatment plant was used to synthesize zeolite material and applied as low-cost adsorbent for the removal of Brilliant Green (BG) from wastewater with higher than 97% adsorption efficiency.
Abstract: In this work, water treatment sludge from the water treatment plant was used to synthesize zeolite material. In the synthesis, the washed sludge was mixed with sodium hydroxide and then heated at 600ºC for 6 h. After agitation, the aged material was heated in a water bath at 80ºC for different period of aging times. Based on XRD and SEM analyses, Faujasite zeolite was obtained. Then, the feasibility of employing the obtained zeolite as adsorbent for Brilliant Green (BG) removal was investigated. The effect of adsorbent dosage and contact time were examined. Adsorption kinetics and isotherm were also evaluated. The results showed that the obtained zeolite has potential for applying as low-cost adsorbent for the removal of BG from wastewater with higher than 97% adsorption efficiency.
DOI•
01 Jun 2018
TL;DR: In this paper, the photocatalytic activity of the ZnS:Mn-Gly-C60 nanocomposites was evaluated via the degradation of brilliant green (BG) dye under 254 nm irradiation, with a UV-vis spectrophotometer.
Abstract: ZnS:Mn-glycine (ZnS:Mn-Gly) nanocomposites were synthesized by capping ZnS:Mn nanocomposites with glycine. Zinc sulfate heptahydrate (ZnSO4·7H2O), glycine (C2H5NO2), manganese sulfate monohydrate (MnSO4·H2O), and sodium sulfide (Na2S) were used as the source reagents. ZnS:Mn-Gly-C60 nanocomposites were obtained by heating the ZnS:Mn-Gly nanocomposites and fullerene (C60) at a 2:1 mass ratio in an electric furnace at 700 °C for 2 h. X-ray diffraction (XRD) was used to characterize the crystal structure of the synthesized nanocomposites. The photocatalytic activity of the ZnS:Mn-Gly-C60 nanocomposites was evaluated, via the degradation of brilliant green (BG) dye under 254 nm irradiation, with a UV-vis spectrophotometer.
Journal Article•
TL;DR: In this article, a study was conducted with the objective of identifying mostly suitable dyes to dye dried plant material for enhancing the quality and to create product diversification through value-addition.
Abstract: The study was conducted with the objective of identifying mostly suitable dyes to dye dried plant material for enhancing the quality and to create product diversification through value-addition. Twenty dyes belonging to four categories i.e. Textile (Green, Pink, Violet, Yellow), Food (Apple Green, Lemon Yellow, Raspberry Red, Orange Red, Bright Green food powder), Indicator (Brilliant Green, Crystal Violet, Eosin Yellow, Metanil Yellow, Methyl Orange, Methylene Blue) and Organic (coffee powder, turmeric powder, dried flowers of palash, rind of pomegranate, Lilium pollens) were evaluated for dyeing. The concentration of dyes was varied along with addition of mordants (common salt and alum). The experiment was divided into four sub experiments and the data on various quality parameters under each category of dye was recorded. The results revealed that turmeric powder scored maximum (23.37/25) amongst organic dyes; Yellow textile dye scored maximum (22.20/25) amongst textile dyes; in case of food dyes Lemon Yellow food powder scored maximum (17.54/25) and in case of indicator dyes Brilliant Green dye scored maximum (14.60/25). Although, immediately after dyeing turmeric powder as organic dye scored maximum but after subsequent storage of dyed flowers up to 120 days, it can be concluded that Yellow textile dye was overall the best as the flowers remained relatively presentable.
TL;DR: In this article, the three-dimensional magnetic hollow porous Ni-ferrites (3D-MHP-NiFe2O4) microsphere has been synthesized.
Abstract: In this study, the three-dimensional magnetic hollow porous Ni-ferrites (3D-MHP-NiFe2O4) microsphere has been synthesized. As-prepared 3D-MHP-NiFe2O4 exhibits superior adsorption capacities for bri...
Patent•
15 May 2018
TL;DR: In this article, a basic brilliant green in mother liquid can be efficiently recovered by an effective method, and the technical problem of difficulty in recovery of existing basic green mother liquid is solved.
Abstract: The invention belongs to the technical field of basic brilliant green recovery, and provides a basic brilliant green mother liquid recovery and purification technology which includes a value adjustingtechnology, a neutralizing technology, a color base preparation technology, an extracting technology and an acid-leaching technology for crystallization and drying. Basic brilliant green in brilliantgreen mother liquid can be efficiently recovered by an effective method, and the technical problem of difficulty in recovery of existing basic brilliant green mother liquid is solved.