Removal of reactive blue 21 and reactive red 195 dyes using horseradish peroxidase as catalyst

Farias, Simone; Oliveira, Débora de; Souza, Sabrina da Silva de; Souza, Selene M.A. Guelli U. de; Morgado, Ayres Ferreira

doi:10.1590/0104-6632.20170343s20160091

Cited by 13 publications

(5 citation statements)

References 25 publications

(22 reference statements)

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“…It is a reactive mono azo dye (description of is chemical structure is provided as Supplementary material, S1). Reactive dyes represent approximately over 12% of the worldwide production [10] and are extensively used in textile and printing industries [11] for dyeing of cellulose, wool and cotton fiber [12]. Reactive dyes form covalent bonds with the fibers that are to be colored;…”

mentioning

confidence: 99%

Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: Analysis of kinetics, equilibrium and adsorption mechanisms

Pérez-Calderón

Santos

Zaritzky

2018

Journal of Environmental Chemical Engineering

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Chitosan particles (CP) prepared by coacervation technique were used as bio-sorbent material to remove the azo RR-195 dye; removal percentage (%RM) and adsorption capacity (Q) in batch adsorption experiments under different conditions of bio-sorbent doses, agitation speed and pH medium were determined; the maximum pH of dye removal was 4. Different adsorption equilibrium isotherms were tested and Redlich-Peterson was the model that best fitted experimental results. From the adsorption thermodynamic parameters, it was concluded that the adsorption process of RR-195 onto CP is spontaneous, favorable (ΔG < 0), endothermic (ΔH > 0) and the dye molecules show affinity for the bio-sorbent (ΔS > 0). The maximum monolayer adsorption capacity (Q m ) of CP was 82.1 mg.g −1 at pH = 4 and 318 K; therefore coacervated chitosan particles are among the top three adsorbent agents for this dye. The %RM was 84.2% in 10 h when the initial concentration of the dye was 300 mg.L −1 . The mixed surface reaction and diffusion-controlled kinetic model (MSR-DCK), fitted satisfactorily experimental results, by considering simultaneous mechanisms of diffusion and adsorption process in the active sites. Fourier transform infrared spectroscopy (FTIR) with attenuated total reflection (ATR), scanning electron microscope-energy dispersion spectrometry X-ray (SEM-EDS) and Zeta potential analysis revealed that the interaction between dye molecules and the bio-sorbent are of an electrostatic nature. Desorption/regeneration experiments indicated that CP can be used in adsorptions/desorption cycles for the removal of wastewater containing RR-195. The information presented in this work demonstrates that CP can be a potent eco-friendly bio-adsorbent for the remediation of industrial wastewater. which in turn deteriorates the aquatic biota [7]. Moreover, these toxic compounds affect the human health; several pathologies such as cancer, jaundice, tumors, skin irritation, allergies, heart effects and mutation arise due to exposure to contaminated wastewater [8,9]. The chemical structure of the dyes allows to classify them as anionic (direct, acid and reactive dyes); cationic (basic dyes); and non-ionic (disperse dyes) [4]. The azo dyes are one of the most important synthetic dyes and they are characterized by having an azo group (eN]Ne) as chromophore, in addition to sulfonate groups (-SO 3 − ), giving the molecule its anionic nature. In the present work the removal of the azo dye Reactive Red 195 (RR-195) was analyzed. It is a reactive mono azo dye (description of is chemical structure is provided as Supplementary material, S1). Reactive dyes represent approximately over 12% of the worldwide production [10] and are extensively used in textile and printing industries [11] for dyeing of cellulose, wool and cotton fiber [12]. Reactive dyes form covalent bonds with the fibers that are to be colored;

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confidence: 99%

Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: Analysis of kinetics, equilibrium and adsorption mechanisms

Pérez-Calderón

Santos

Zaritzky

2018

Journal of Environmental Chemical Engineering

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“…The colour changing is our strategy in identification of pathogen in this study, on the other hand, transfer of dye into silica particles has always been a major challenge because of hydrophilic environments that do not have the ability of inserting the hydrophobic dye into the particles, so in this study, C.I. Reactive Blue 21, a polar and organic dye was used to increase the electrostatic attraction of the dye molecules with a negative charge in the silica matrix [22]. Among the various available methods for the synthesis of coloured silica nanoparticles, w/o method was selected for easy control of the particles size, cost-effectiveness, thermodynamic and isotropic properties [14,23].…”

Section: Discussionmentioning

confidence: 99%

Designing an immunosensor for detection of Brucella abortus based on coloured silica nanoparticles

Shams

Zarif

2019

Artificial Cells, Nanomedicine, and Biotechnology

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Brucellosis has always been a threat to the health and economics of societies. We report a new colorimetric immunoassay based on colored silica nanoparticles for detection of Brucella abortus. An immunosensor was designed based on blue-SiNPs and paramagnetic nanoparticles (PMNPs). The synthesized immunosensor was conjugated with a polyclonal antibody against B. abortus, which was activated by 1-Ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) and N-hydroxysuccinimide (NHS) to form detection and capture probes, respectively. After adding the conjugates to the bacterial suspension, sandwich structure of PMNPs B. abortus-blue-SiNPs was formed and then separated by a magnet. The blue dye was released from the silica structure and its absorbance was measured at 670 nm with a spectrophotometer. Under optimal conditions, results showed a wide dynamic range from 1.5 Â 10 3 to 1.5 Â 10 8 cfu mL À1 with a detection limit of 450 cfu mL À1. The specificity of the sensor was confirmed in comparison with 5 other bacteria. Also, during the 120-days period, the complex was stable. The results suggested that it can be used in real samples (R 2 ¼ .9865). This designed colorimetric immunoassay strategy can be used as an alternative, user-friendly and on-site tool for the rapid detection of Brucella spp. compared to other common methods with high sensitivity and specificity in a short time.

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“…Different methodologies have been developed for the degradation and/or scavenging of those dyes, especially azo dyes (the most common synthetic dyes, ca 70% wt.). These methodologies include adsorption, biological oxidation, membrane filtration, ozonation, oxidation using UV/H2O2, UV/TiO2 and UV or visible light and catalysis [3,[6][7][8][9]. The approaches based on catalytic processes appear as important alternatives in the remediation of effluents.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of methyl orange mediated by a silica coated nanomagnet porphyrin hybrid

Castro

Rodrigues

Faustino

et al. 2021

Journal of Organometallic Chemistry

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Removal of reactive blue 21 and reactive red 195 dyes using horseradish peroxidase as catalyst

Cited by 13 publications

References 25 publications

Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: Analysis of kinetics, equilibrium and adsorption mechanisms

Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: Analysis of kinetics, equilibrium and adsorption mechanisms

Designing an immunosensor for detection of Brucella abortus based on coloured silica nanoparticles

Photocatalytic degradation of methyl orange mediated by a silica coated nanomagnet porphyrin hybrid

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