Showing papers on "Brilliant green published in 2017"
TL;DR: The ultrasound-assisted simultaneous adsorption of brilliant green and malachite green onto Mn-doped Fe3O4 nanoparticle-loaded activated carbon as a novel adsorbent as an investigated and analyzed using first derivative spectrophotometry makes it promising for such adsorptive applications.
153 citations
TL;DR: In this paper, the effect of various parameters such as pH, initial dye concentration, adsorbent dose, ionic strength on the adsorption process was investigated and it was shown that an increase in adorption capacity was observed with increase in concentration of existing ion.
Abstract: Activated carbon (MTLAC) and sulfonic acid modified activated carbon (MTLAC-SA) were prepared from a low cost agricultural waste material matured tea leaf (MTL). BET surface area of MTLAC and MTLAC-SA was found to be 1313.4 m2/g and 1169.3 m2/g respectively. Synthesized materials were applied for adsorption of both anionic and cationic dyes. Rhodamine B (RhB), methylene blue (MB), brilliant green (BG), crystal violet (CV) and orange G (OG) were taken as the model dye. After modification, the activated carbon showed enhanced adsorption capacity for adsorption of cationic dyes. The effect of various parameters such as pH, initial dye concentration, adsorbent dose, ionic strength on adsorption process was investigated. A slight increase in adsorption capacity was observed with increase in concentration of existing ion. The equilibrium adsorption data were best described by Langmuir model. The maximum adsorption capacity for RhB and OG using MTLAC-SA (MTLAC) was found to be 757.6 (398.4) mg/g and 105.7 (318.5) mg/g respectively. The adsorption kinetics was best fitted with pseudo second order kinetic model. The thermodynamic study illustrated that the adsorption process is endothermic and spontaneous in nature.
129 citations
TL;DR: In this paper, an experimental study on the removal of brilliant green dye from aqueous solutions in a batch stirred electrocoagulation (EC) reactor using iron electrodes was presented.
122 citations
TL;DR: In this article, the authors reported the preparation and characterization of ZnO nanoparticles prepared by low temperature hydrothermal methods and their application for anionic dye (Congo red) and cationic dye (Brilliant green) removal from aqueous medium.
Abstract: This work reports preparation and characterization of ZnO nanoparticles prepared by low temperature hydrothermal methods and their application for anionic dye (Congo red) and cationic dye (Brilliant green) removal from aqueous medium. The adsorption capacity of ZnO nanoparticles for Congo red dye and Brilliant green dye was up to 71.4 and 238 mg/g, respectively under selected process conditions. Dye adsorption behaviour has been explained applying different isotherms. Freundlich isotherm model best fitted to the dye removal data. Adsorption kinetics of both dyes is well explained by pseudo-second order model. Physical adsorption has been investigated using thermodynamic parameters viz., Gibb’s free energy (ΔG⁰), enthalpy (ΔH⁰) and entropy (ΔS⁰). The reusability of ZnO nanoparticles was examined upto three cycles.
94 citations
TL;DR: The characterization of modified poZZolan by FTIR, TGA/DTG, BET, and DRUV–vis revealed the effectiveness of grafting of amine functional group on pozzolan structure, and the kinetic adsorption data were better fitted with general order for both dyes while for equilibrium models were better fitting by the Liu isotherm model.
Abstract: Natural pozzolan is an amorphous silicate-based material of volcanic origin. In this work, the natural pozzolan was modified by using 3-aminopropyltriethoxysilane (APTES) as a grafting agent. This material was characterized by pHpzc, N2 adsorption/desorption curves, FTIR, TGA/DTG, DRUV, SEM, and elementary analysis. The functionalized materials were used for the removal of Reactive Black 5 (RB-5) and Brilliant Green 1 (BG-1) dyes from aqueous solutions using batch-contact adsorption. The characterization of modified pozzolan by FTIR, TGA/DTG, BET, and DRUV–vis revealed the effectiveness of grafting of amine functional group on pozzolan structure. The kinetic adsorption data were better fitted with general order for both dyes while for equilibrium models were better fitted by the Liu isotherm model. The maximum sorption capacities Q
max (at 50 °C) obtained with the modified pozzolan were 350.6 and 300.9 mg g−1 for BG-1 and RB-5, at pH 9.0 and 2.0, respectively. The thermodynamic parameters show that the removal of dyes was spontaneous and endothermic. The modified material was also tested for the treatment of simulated dye house effluents showing very high efficiency.
69 citations
TL;DR: In this paper, Peganum harmala activated carbon (PHAC) was used for the rapid removal and fast adsorption of BG from the solvent phase, which revealed the endothermic nature of BG.
66 citations
TL;DR: The experimental results indicated the MGO-laccase nanomaterials had a good catalysis ability to decolorize dyes in aqueous solution and the employment of MGO as enzyme immobilization support could efficiently enhance the availability and facilitate the application of laccase.
Abstract: In this study, magnetic graphene oxide (MGO) nanomaterials were synthesized based on covalent binding of amino Fe3O4 nanoparticles onto the graphene oxide (GO), and the prepared MGO was successfully applied as support for the immobilization of laccase. The MGO-laccase was characterized by transmission electron microscopy (TEM) and a vibrating sample magnetometer (VSM). Compared with free laccase, the MGO-laccase exhibited better pH and thermal stabilities. The optimum pH and temperature were confirmed as pH 3.0 and 35 °C. Moreover, the MGO-laccase exhibited sufficient magnetic response and satisfied reusability after being retained by magnetic separation. The MGO-laccase maintained 59.8% activity after ten uses. MGO-laccase were finally utilized in the decolorization of dye solutions and the decolorization rate of crystal violet (CV), malachite green (MG), and brilliant green (BG) reached 94.7% of CV, 95.6% of MG, and 91.4% of BG respectively. The experimental results indicated the MGO-laccase nanomaterials had a good catalysis ability to decolorize dyes in aqueous solution. Compared with the free enzyme, the employment of MGO as enzyme immobilization support could efficiently enhance the availability and facilitate the application of laccase.
57 citations
TL;DR: In this article, the authors reported the successful synthesis, detailed characterization and solar-light driven photocatalytic degradation of zinc sulfide (ZnS) quantum dots using co-precipitation method using sodium dodecyl sulfate as stabilizing agent.
37 citations
TL;DR: In this article, commercial polyurethane foam was coupled with magnetite nanoparticles through isothiouronium groups (IT) to prepare a new porous sorbent (PUF@IT@MNPs) with improved ionic character and better sorption affinity towards ionic molecules.
27 citations
TL;DR: In this article, the adsorption capacity of Fe3O4@SDBS@LDHs to brilliant green (BG) reached 329.1 mg/g after the adaption equilibrium.
20 citations
TL;DR: In this paper, a non-ionic surfactant for micro-cloud point extraction (MCPE) followed by non-aqueous micellar capillary electrophoresis (MCE) was used for separation and nonlinear laser wave-mixing detection.
Abstract: A laser wave-mixing CE detection method is reported for separation and detection of malachite green (MG), crystal violet (CV), brilliant green (BG), methylene blue (MB), and the leuco-metabolites of MG and CV residues in aquacultures. This method applies a non-ionic surfactant for micro-cloud-point extraction (MCPE) followed by non-aqueous micellar capillary electrophoresis (MCE) for separation and nonlinear laser wave-mixing detection. The log–log plot of the MCE wave-mixing intensity vs. analyte concentration showed a good quadratic dependence with correlation coefficients greater than 0.989. The mass detection limits at an S/N of 2 were determined to be 2.27, 1.50, 23.8, 190, 27.61 and 22.2 attograms for MG, CV, BG, MB, leuco-MG, and leuco-CV, respectively. The concentration limits of detection (LODs) at an S/N of 2 were determined to be 4.13, 2.72, 10.2, 81.6, 50.2 and 40.3 pg mL−1 for MG, CV, BG, MB, leuco-MG and leuco-CV, respectively. The intra-day variability (RSD) for the retention times ranges from 0.6 to 1.0% and the average inter-day variability (RSD) ranges from 0.7 to 4.7%. This method is simple, rapid and reliable, and it allows separation and simultaneous detection of MG, CV, MB, BG, and the leuco-metabolites of MG and CV in aquatic environments.
TL;DR: In this article, the decolorization of brilliant green dye using a combination of two advanced oxidation techniques viz sonocatalysis and photocatalysis (immersed lamp) known as sonophotocatalytic (3L capacity) was investigated.
Abstract: The textile and dye industries require an enormous amount of water for processing and produce a large volume of wastewater. Generated wastewater had potential hazards and a threat to the aquatic biota. The present work investigates the decolorization of brilliant green dye using a combination of two advanced oxidation techniques viz sonocatalysis and photocatalysis (immersed lamp) known as sonophotocatalysis (3 L capacity). The efficiency of decolorization is further improved in the presence of various additives viz. copper oxide, zinc oxide, and sodium chloride. The maximum decolorization of brilliant green (BG) (94.8% in 120 min) obtained in the presence of zinc oxide. The total organic carbon of the treated samples was measured to monitor complete mineralization of BG. The sonophotocatalytic process (in the presence of zinc oxide) shows maximum mineralization. Synergic combination of two oxidation processes increased the production of oxidizing radicals. Continuous cleaning of catalyst surface (due to sonolysis effect) improves the activity of the catalyst for photolysis operation. The present work is highly useful for the development of a sonophotocatalytic process.
12 Jun 2017
TL;DR: In this paper, the analyses of removal of Methylene Blue (MB) and Brilliant Green (BG) dyes from aqueous solutions by adsorption on activated carbon prepared by chemical activation of coconut shell, eucalyptus tree, corn cob and flamboyant pod were investigated.
Abstract: This paper investigated the analyses of removal of Methylene Blue (MB) and Brilliant Green (BG) dyes from aqueous solutions by adsorption on activated carbon prepared by chemical activation of coconut shell, eucalyptus tree, corn cob and flamboyant pod. It was found that the carbon pores increased after carbonization and activation processes. The maximum percentage MB removal was obtained as 95.0% for coconut shell, 93.2% for eucalyptus tree, 99.9% for corn cob, and 99.7% for flamboyant pod. Also, the maximum percentage BG removal was obtained as 97.0% for coconut shell, 98.2% for eucalyptus tree, 99.6% for corn cob, and 99.6% for flamboyant pod. The adsorption isotherms of the adsorption process were studied, and Freundlich model showed the best fit with the equilibrium data. To optimize the operating conditions, the effects of contact time, adsorbent dosage, and pH were investigated by two levels of factorial experimental design method and adsorbent dosage was found as the most significant factor.
TL;DR: In this paper, a stable and inexpensive biosorbent polymer composite was synthesized by coupling of the Salvadora persica roots with polyhydroxy polyurethane foam (PPF).
Abstract: A novel, stable and inexpensive biosorbent@polymer composite was synthesized by coupling of the biosorbent (Salvadora persica roots, SPR) with polyhydroxy polyurethane foam (PPF). The SPR@PPF was characterized using different tools. It was clear that the surface of SPR@PPF contained nanocrystals particle dispersed in the amorphous phase and also contained 2.4 and 1.0 mmol/g of acidic and basic sites. Thermogravimetric curve showed two endothermic peaks at 304 and 396°C due to the cupling of SPR@PPF. The morphology (surface area, pore volume and pore radius) of SPR@PPF are 34.6 m2/g, 0.053 cm3/g and 15.4 Ǻ, respectively. The SPR@PPF has successfully utilized in removing of brilliant green (BrG; basic dye) and brilliant blue (BrB; acidic dye) from both acidic and alkaline wastewater. The SPR@PPF was proven efficient for the complete removal of BrG and BrB with a sorption capacity of 202.7 and 142.4 mg/g at pH values of 5–7 and 1–2, respectively. Sorption rate constant values (k1) are 0.09 and 0.23 min−1 and half-life (t1/2) are 11 and 4.3 min and the removal process is spontaneous (ΔG is −3.75 kJ/mol). The results sustained the suitability of SPR@PPF as efficient sorbent for the dyes removing.
TL;DR: In this article, the effects associated with microwave, photocatalysis, and sequential combination of microwave, and photo-coating were investigated for the treatment of brilliant green dye, and the results of the continuous approach shown nearly same degradation as that of the batch reactor at a flowrate of 4.5mL/min.
Abstract: The treatment of environmental persistence compounds is gaining importance due to its associated hazards and impact on the ecosystem. Advanced oxidation processes are considered as a most viable option for treatment of these compounds. Present work investigated the treatment of brilliant green dye using the effects associated with microwave, photocatalysis and sequential combination of microwave, and photocatalysis. Findings of work confirmed that the sequential effect of microwave followed photocatalysis had shown the maximum degradation of brilliant green dye. The maximum degradation obtained in the presence of zinc oxide as a catalyst was 94.3 ± 0.8% (TOC removal: 46.4 ± 0.18% and pseudo first order rate constant: 35.2 ± 0.26 min−1). A continuous approach developed based on the optimized results of sequential effects. The results of the continuous approach shown nearly same degradation as that of the batch reactor at a flowrate of 4.5 mL/min. The present work has shown the higher potential for degradation of brilliant green dye and process engineers for pilot scale development of this technology.
TL;DR: In this article, a Zn(II) metal-organic framework (MOF), [Zn2(tpdc)2(H2O)2]-H2E2(DMF)5 (1, H2tpdc = 5′-(4H-1,2,4-triazol-4-yl)phenyl)-[1,1′:3′,1″-terphenyl]-4,4″-dicarboxylic acid), was synthesized under solvothermal condition.
TL;DR: In this paper, the photocatalytic behavior of TiO2/CdS nanocomposites for the degradation of the organic dyes brilliant green and methylene blue under solar light irradiation was narrated.
Abstract: The present work narrates the photocatalytic behaviour of TiO2/CdS nanocomposites for the degradation of the organic dyes brilliant green and methylene blue under solar light irradiation. For this process, TiO2 loaded with different concentrations of CdS was prepared through a sol–gel approach and the prepared products were studied for their structural, optical and morphological characteristics. The degradation details of the studied composites reveal that TiO2 loaded with an optimum level of CdS is known to have outstanding catalytic activity due to its higher BET surface area, rod-like morphology and low charge transfer resistance.
TL;DR: Phytotoxicity analyses suggested that the treated dye could be tuned as beneficial source for agricultural practices and macroalga could be utilized as an efficient adsorbent for dye removal from aqueous solution.
Abstract: In this study, the removal of brilliant green dye from aqueous solution using seaweed Sargassum wightii was carried out. The effects of different variables such as adsorbent dose, pH, initial dye concentrations and temperature were studied through batch experimental system. The adsorbent–adsorbate interaction was characterized by Fourier transform infrared spectroscopy and UV–Vis spectrophotometer and the surface structure of the sorbent was documented by scanning electron microscopy and chemical composition was determined by energy dispersive X-ray spectroscopy. The maximum biosorption of brilliant green dye was observed at the sorbent concentration of 0.1 g/L, 7 of pH at 35°C of temperature and initial dye concentration of 10 mg/L. Sorption interaction of dye on to algal biosorbents obeyed the pseudo-second-order rate (R2 = 0.99). Experimental data showed good fit with the Langmuir adsorption isotherm (R2 = 0.996) model with a maximum biosorption capacity of 43.48 mg/g. Furthermore, significant reduction in physicochemical parameters was obtained in the treated dye compared with the untreated dye. Phytotoxicity analyses suggested that the treated dye could be tuned as beneficial source for agricultural practices. Accordingly macroalga could be utilized as an efficient adsorbent for dye removal from aqueous solution; prompting to resulting subsequent reduction of toxic effects of the treated dye, alleviates environment damage.
06 Jan 2017
TL;DR: In this paper, the authors investigate the adsorption of textile dyes like Acid Blue 9 and Brilliant Green from aqueous solution over activated carbon prepared from coconut shell(CSC) and palmyra fruit nut shell(PFSC) at different reaction parameters.
Abstract: Synthetic dye stuffs are extensively used for textile dyeing and other industrial applications. The textile industries generate large volumes of waste water which contains toxic compounds. The disposal of these wastes into water bodies causes damage to the environment. These effluents require prior treatment before being discharged into the water bodies to prevent water pollution. The aim of this study is to investigate the adsorption of the textile dyes like Acid Blue 9 and Brilliant Green from aqueous solution over activated carbon prepared from coconut shell(CSC) and palmyra fruit nut shell(PFSC) at different reaction parameters. CSC has higher removal efficiency for these two dyes than PFSC. Adsorption data were fitted well with Freundlich isotherm and the kinetic data followed a pseudo-second order model in addition to intra-particle diffusion model ( with removal more than 99%) at all conditions.
TL;DR: The results suggest that two polysulfonated triarylmethane food dyes might display different affinity with transporters or channels on infected RBC membrane.
Abstract: The search for safe antimalarial compounds acting against asexual symptom-responsible stages and sexual transmission-responsible forms of Plasmodium species is one of the major challenges in malaria elimination programs. So far, among current drugs approved for human use, only primaquine has transmission-blocking activity. The discovery of small molecules targeting different Plasmodium falcip-arum life stages remains a priority in antimalarial drug research. In this context, several independent studies have recently reported antiplasmodial and transmission-blocking activities of commonly used stains, dyes and fluorescent probes against P. falciparum including chloroquine-resistant isolates. Herein we have studied the antimalarial activities of dyes with different scaffold and we report that the triar-ylmethane dye (TRAM) Brilliant green inhibits the growth of asexual stages (IC 50 2 mM) and has exflagellation-blocking activity (IC 50 800 nM) against P. falciparum reference strains (3D7, 7G8) and chloroquine-resistant clinical isolate (Q206). In a second step we have investigated the antiplasmodial activities of two polysulfonated triarylmethane food dyes. Green S (E142) is weakly active against P. falciparum asexual stage (IC 50 x 17 mM) whereas Patent Blue V (E131) is inactive in both antimalarial assays. By applying liquid chromatography techniques for the culture supernatant analysis after cell washings and lysis, we report the detection of Brilliant green in erythrocytes, the selective uptake of Green S (E142) by infected erythrocytes, whereas Patent Blue V (E131) could not be detected within non-infected and 3D7-infected erythrocytes. Overall, our results suggest that two polysulfonated food dyes might display different affinity with transporters or channels on infected RBC membrane.
TL;DR: In this article, the photocatalytic degradation of triarylmethane (brilliant green and acid blue 9), bisazo (C. reactive black 5), and monoazo dyestuffs (CI. reactive red 194, and C. reactive orange 5) with natural sunlight in homogeneous aqueous solutions was investigated.
Abstract: Polyoxometalate, K6TiW11O39Sn·7H2O (TiW11Sn), was synthesized and characterized. TiW11Sn and K6ZrW11O39Sn·12H2O (ZrW11Sn) were evaluated for their photocatalytic degradation of triarylmethane (brilliant green and acid blue 9), bisazo (C.I. reactive black 5), and monoazo dyestuffs (C.I. reactive red 24, C.I. reactive red 194, and C.I. reactive orange 5) with natural sunlight in homogeneous aqueous solutions. TiW11Sn and ZrW11Sn effectively and photocatalytically decolorized the dyestuffs. The TiW11Sn- and ZrW11Sn-mediated photocatalytic degradation of the dyestuffs involved a pseudo-first-order reaction and was modeled by Langmuir–Hinshelwood-type kinetics. The observed pseudo-first-order rate constants (K/) of triarylmethane dyestuffs were generally bigger than that of the azo dyestuffs. Quantitative structure–property relationship models of the K/ of the dyestuffs were developed using partial least-square regression. The cumulative variance of the dependent variable explained by the partial least...
Journal Article•
TL;DR: In this paper, a study was conducted for decolorization of malachite green and brilliant green using wood rot fungal cultures, which varied in their dye decolorizing potential, showing 47.36% and 14.18-93.3197% decolorisation of green and gold respectively in 24 d.
Abstract: Chemical synthetic dyes are now widely used in many industries such as leather, paper printing, textiles, wool, cosmetics, and food. The major problems associated with the use of dye are that they are resistant to degradation, difficult to remove waste water, non eco-friendly and causing health hazards due to their carcinogenic nature. The use of extracellular enzyme systems from wood rotting fungi are now growing very fast as green technology to biologically remediate such aromatic coloured compounds. In view of above, present study was undertaken for decolorization malachite green and brilliant green using wood rot fungal cultures. Out of various fungal isolates eight fungal isolates and one standard culture of potent Lignolytic fungus Phnerochaete chrysosporium were used for dye decolorization study, both qualitatively and quantitatively. The cultures varied in their dye decolorizing potential, showing 47.3197.36% and 14.18-93.63% decolorization of malachite green and brilliant green respectively in 24 d. Phase contrast microscopy clearly revealed the asorption of the dyes by fungal cultures (mycelia/spores) in the photomicrographs. Among various cultures tested, the isolate AFP5 showing maximum dye decolorizing/ bioabsorbing ability was found as the most potential isolate.
TL;DR: In this article, the photocatalytic activity of commercial and mechanically activated zinc oxide powders has been investigated based on the example of the decomposition of Brilliant Green, and the effect of the grinding time (0, 1, 3, 5, and 7 min) on the structure of zinc oxide and its photocatalysis under visible and ultraviolet (UV) radiation.
Abstract: A study of the photocatalytic activity of commercial and mechanically activated zinc oxide powders has been carried out based on the example of the decomposition of Brilliant Green. The goal of this work was to study the effect of the grinding time (0, 1, 3, 5, and 7 min) on the structure of zinc oxide and its photocatalytic activity under visible and ultraviolet (UV) radiation. It has been found that, when UV radiation is used, the constant of the dye oxidation rate for samples activated for 1 min increases compared with unactivated powders, whereas further mechanical activation leads to a decrease in the photocatalytic activity. When using visible radiation, samples activated for 1 min showed the minimum photocatalytic activity and further mechanical activation led to an increase in the efficiency of photocatalysis.
01 Jan 2017
TL;DR: In this article, physically activated carbon (PAC) is used to adsorb dyes from waste water because of its high adsorption abilities, the batch experiment was investigated by different variables like contact time, dye concentration, dosage of activated carbon, temperature, pH, agitation speed, activation time and desorption studies.
Abstract: The textile effluents are toxic compounds, has a significant negative consequence on the environment, especially during its discharge in water and soil. The present work, physically activated carbon (PAC) is a low-cost effective adsorbent used to adsorb dyes from waste water because of its high adsorption abilities. The batch experiment was investigated by different variables like contact time, dye concentration, dosage of activated carbon, temperature, pH, agitation speed, activation time and desorption studies. At optimum experimental conditions, maximum removal of Brilliant Green (BG) dye has been observed to be 99%. The different adsorption isotherms were modelled to describe the equilibrium data. The adsorption data were analyzed using kinetic and diffusion models. On the basis of experimental results, the physically activated carbon showed excellent sorption properties with high dye removal capacity.
Patent•
28 Jul 2017
Abstract: The invention provides discolored black ink and a preparation method thereof. The black ink comprises, by weight, 0.8-0.85% of a red dye, 2.5-3.0% of a green dye, 3.0-3.5% of a thickener, 1.0-1.5% of a surfactant, 0.15-0.20% of a preservative and the balance of distilled water. The red dye is acid fuchsin or basic fuchsin. The green dye is an acidic green dye, a basic green dye or a brilliant green dye. The preparation method is simple, utilizes raw materials having wide sources and realizes a low cost. The black ink is non-toxic, has no pungent smell and can fade when contacting with a reductive material. The paper with the ink can be recycled.