Topic
Brilliant green
About: Brilliant green is a research topic. Over the lifetime, 627 publications have been published within this topic receiving 12495 citations.
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TL;DR: In this article, a new method was developed for the rapid extraction and direct photometric determination of antimony using 20% TBP-toluene 3 to 15 μg of Antimony is extracted from 2M hydrochloric acid containing 1 M magnesium chloride.
Abstract: A new method is developed for the rapid extraction and direct photometric determination of antimony. With 20% TBP-toluene 3 to 15 μg of antimony is extracted from 2M hydrochloric acid containing 1 M magnesium chloride. From the organic phase, antimony is directly determined photometrically at 640 nm as its complex with brilliant green. Antimony can be selectively extracted in the presence of a large number of cations and anions. The total operation requires only 20 min.
12 citations
TL;DR: The different ionic molecules/compounds used as a ligand for the immobilization of penicillin G acylase on the highly porous cellulose-based polymeric membrane having buffer flux 1,746 LMH (L m−2 h−1) at 0.5 bar pressure retained almost 50% activity after 107 days and 50 cycles of operation.
Abstract: The different ionic molecules/compounds were used as a ligand for the immobilization of penicillin G acylase on the highly porous cellulose-based polymeric membrane having buffer flux 1,746 LMH (L m−2 h−1) at 0.5 bar pressure. The immobilized enzyme activity around 250 UApp was obtained with the ligand such as proline, tryptophan, casein acid hydrolysate, and brilliant green. Comparatively, proline showed less IMY% (percentage immobilization yield—58) but higher RTA% (percentage of activity retention—71) and specific activity (145 UApp g−1). However, the crosslinked preparation of brilliant green obtained using glutaraldehyde showed 82 ± 2.7% immobilized enzyme activity after the completion of successive five cycles. In comparison with the free enzyme, the enzyme immobilized on the brilliant green coupled membrane showed around 2.4-fold increase in Km value (47.4 mM) as well as similar optimum pH (7.2) and temperature (40 °C). The immobilized enzyme retained almost 50% activity after 107 days and 50 cycles of operation. Almost 50% decrease in buffer flux after enzyme immobilization was observed. At the end of the 30 cycles, flux pattern shows around 38% decrease in buffer flux however, after 16 cycles of operation flux moves closer towards the steady state.
12 citations
TL;DR: In this article , a combination of magnetic anion exchange microbeads and magnetic cation exchange micro-bead was used to remove crystal violet (CV; a basic dye) and acid green 9 (AG9; an acidic dye) from their individual and combined solutions.
12 citations
DOI•
24 May 2016
TL;DR: In this paper, the response surface methodology has been used to determine the optimum conditions for the Brilliant Green dye removal efficiency from aqueous solution by electrocoagulation, and the experimental parameters which have been investigated were initial dye concentration: 100-500 mg/L; voltage: 4-12V; NaCl Concentration: 0.5-1.5g/l and reaction time: 10-30min.
Abstract: The response surface methodology has been used to determine the optimum conditions for the Brilliant Green dye removal efficiency from aqueous solution by electrocoagulation. The experimental parameters which have been investigated were initial dye concentration: 100–500 mg/L; voltage: 4-12V; NaCl Concentration:0.5-1.5g/l and reaction time: 10–30min. These parameters were changed at three levels according to the Box Behnken Design to evaluate their effects on decolorization through analysis of variance. High R2 value of 96.16% shows a high correlation between the experimental and predicted values and expresses that the second-order regression model is acceptable for Brilliant Green dye removal efficiency. Optimum dye removal efficiency of 99.0% was observed experimentally at NaCl concentration of 0.5008g/l, initial dye concentration of 500 mg/L, applied voltage of 4.0065V and reaction time of 12.22 min, which is close to model predicted (98.9997%) result.
12 citations
TL;DR: In this article, the shrinking core model (SCM) was used to describe adsorption in porous systems, but not in clay/polymer composite beads, and the experimental changes in penetration radius and dye concentration with time were compared with SCM predictions at different initial concentrations of brilliant green.
Abstract: Montmorillonite/alginate composite beads have been studied for adsorption of brilliant green dye in batch experiments. The geometry and features of this clay/polymer composite, in combination with the strong color of the dye, were very useful to apply and test in a simple way the shrinking core model (SCM). This model is very popular for describing adsorption in porous systems, but not in clay/polymer composite beads. The SCM describes the adsorption as a diffusion process of the adsorbate through a spherical shell. The great advantage of using the clay and the dye is that they allow observing with the naked eye or through digital photographs the progress of the front of adsorption (penetration radius) as the reaction takes place. This was never informed in the literature. The experimental changes in penetration radius and dye concentration with time were compared with SCM predictions at different initial concentrations of brilliant green. There was an excellent agreement between theory and experiments, and thus the kinetics of the process could be thoroughly evaluated. The estimated values of the parameters liquid phase mass transfer coefficient and effective diffusion coefficient in the adsorbent are kf > 0.00008 m s−1 and Dp = 5 × 10−10 m2 s−1 respectively.
12 citations