Partition study of textile dye Remazol Yellow Gold RNL in aqueous two-phase systems

Alvarenga, Juliana Maria de; Fideles, Renata Aparecida; Silva, Maira Vieira da; Murari, Gabriella Frade; Taylor, Jason G.; Lemos, Leandro Rodrigues de; Rodrigues, Guilherme Dias; Mageste, Aparecida Barbosa

doi:10.1016/j.fluid.2015.01.022

Cited by 51 publications

(33 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The cloud point method was used to obtain the binodal curves Preparation of ATPS Assays. As previously reported in others authors' works on the literature [22,23], the ATPS assays follows a well established methodology. Previously, stocks solutions of PEG and (NH 4 ) 2 SO 4 were prepared by weighing appropriate amounts of reagents on an analytical balance (Shimadzu, AX 200 with an uncertainty of ± 0.0001 g).…”

Section: Methodsmentioning

confidence: 99%

Phase diagrams of aqueous two-phase systems formed by polyethylene glycol+ammonium sulfate+water: equilibrium data and thermodynamic modeling

Murari

Penido

Machado

et al. 2015

Fluid Phase Equilibria

Self Cite

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

Phase diagrams of aqueous two-phase systems formed by polyethylene glycol+ammonium sulfate+water: equilibrium data and thermodynamic modeling

Murari

Penido

Machado

et al. 2015

Fluid Phase Equilibria

Self Cite

View full text Add to dashboard Cite

“…Commercially available Fe 0 aggregate has long been applied in soil and groundwater remediation for reductive transformation of certain persistent organic and inorganic pollutants (Wilkin et al, 2005;Weng et al, 2007). In this study, an anionic reactive dye, RemazolÒ Golden Yellow RGB (RGY), a widely used dye in textile processing industries worldwide (Alvarenga et al, 2015) was used as model target compound to evaluate the decolorization efficiency of PS activated with Fe 0 aggregate (PS/Fe 0 ). To the best of our knowledge, there have been no studies of Fe 0 aggregate as an activator for PS oxidation of reactive dyes.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient persulfate oxidation process activated with Fe0 aggregate for decolorization of reactive azo dye Remazol Golden Yellow

Weng

Tao

2018

Arabian Journal of Chemistry

View full text Add to dashboard Cite

The commercially available Fe 0 aggregate has advantages of low-cost, fast-effective decontamination, reusability, and ease of operation. However, little study has been done on the performance of Fe 0 aggregate as a catalyst in degradation of azo dyes, particularly used in persulfate (PS) oxidation process. This study investigated decolorization of a reactive azo dye, Remazol Golden Yellow (RGY, Reactive Orange 107), by persulfate oxidation activated with Fe 0 aggregate. RGY decolorization was not effective in ultrasound-activated, heat-activated, and base-activated persulfate oxidation; however, a significant decolorization improvement was achieved by applying Fe 0 aggregate to activated persulfate (PS/Fe 0 ). Decolorization was strongly influenced by pH, Fe 0 , persulfate dosages and temperature. The suitable conditions for RGY decolorization were pH 6.0, PS 5 · 10 -3 M, and Fe 0 0.5 g/L. This condition yields 98% color removal of 100 mg/L RGY solution within 20 min treatment; the azo bonds of RGY were completely broken down. RGY decolorization followed the first-order kinetics. Activation energy of the PS/Fe 0 system was 0.479 kJ/mol, suggesting the temperature dependence of RGY decolorization is small. The presence of inorganic salt in RGY solution had an adverse effect on decolorization. The inhibitory effect of various inorganic salts on decolorization followed the sequence of Na 2 HPO 4 ) NaHCO 3 ) NaClO 4 > NaCl > NaNO 3 > NaClO 4 > no salt. The Fe 0 aggregate was reusable and a satisfactory decolorization efficiency was achieved with the repeated use of Fe 0 for five times. The PS/Fe 0 process provides an efficiency and effective technology for RGY decolorization. ª 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

show abstract

“…As generally occurs with other solute partitioning in ATPSs, 8,14,15 the K values of phenothiazine dyes and the dependence of these values on the TLL could be affected by the nature of the ATPS electrolyte. Cation effects are strong on the partitioning behavior of different solutes between ATPS phases and follow the order Li + > Na + > Mg +2 .…”

Section: Cation Effect On Phenothiazine Dye Partition Behaviormentioning

confidence: 94%

“…ITC is a very sensitive technique that can detect the very low energy fluxes (around 0.2 μW) that are associated with the different thermodynamic processes that occur with very small changes in a system enthalpy, such as in the dilution of solutes. 43 As water is generally the main component in many different ATPSs, 8 it is very important to understand the specific interaction that occurs between dyes and water molecules.…”

Section: Thermodynamic Parameters Of Phenothiazine Dye Partitionmentioning

confidence: 99%

“…Since 1958 with the pioneering work of Albertson, 1 aqueous two-phase systems (ATPS) have proven to be efficient and environmentally safe methods for the extraction and purification of a great number of chemical species, such as enzymes, 2 proteins, 3 metals, 4,5 nanoparticles, 6 carbon nanotubes, 7 and synthetic [8][9][10][11][12][13] and natural [14][15][16] dyes. Despite these works, most of the studies 9,[17][18][19][20][21] investigating the partitioning of solutes have been limited to investigating the feasibility of utilizing aqueous two-phase extraction for the separation and purification of the solutes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New Insights into the Partitioning of Phenothiazine Dyes in Aqueous Two-Phase Systems

Coelho

Agudelo

Ferreira

et al. 2020

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

Aqueous two-phase systems (ATPSs) have proven to be efficient and environmentally safe methods for extracting chemical species. However, the driving forces behind the partition of solutes in these systems are still little understood. A complete thermodynamic partitioning of phenothiazine dyes was investigated in poly(ethylene oxide) (PEO) + salt + water ATPSs. Standard transfer parameters (Gibbs free energy change (Δ tr G o), enthalpy change (Δ tr H o) and entropy change (TΔ tr S o)) were evaluated, and their dependence on the dye structure, electrolyte nature and tie line length (TLL). All phenothiazine dyes are concentrated predominantly in the polymer enriched phase, with Δ tr G o values ranging from −4.1 up to −13.4 kJ mol −1. Due to the dye-PEO attractive interactions that occur mainly via benzene condensed ring present in the structures of phenothiazine dyes, the partitioning of these dyes was enthalpically driven, with −11.4 ≥ Δ tr H o ≥ −52 kJ mol −1 and −4.93 ≥ TΔ tr S o ≥ −38 kJ mol −1 .

show abstract

Partition study of textile dye Remazol Yellow Gold RNL in aqueous two-phase systems

Cited by 51 publications

References 35 publications

Phase diagrams of aqueous two-phase systems formed by polyethylene glycol+ammonium sulfate+water: equilibrium data and thermodynamic modeling

Phase diagrams of aqueous two-phase systems formed by polyethylene glycol+ammonium sulfate+water: equilibrium data and thermodynamic modeling

Highly efficient persulfate oxidation process activated with Fe0 aggregate for decolorization of reactive azo dye Remazol Golden Yellow

New Insights into the Partitioning of Phenothiazine Dyes in Aqueous Two-Phase Systems

Contact Info

Product

Resources

About