Advanced Oxidation of Tartrazine and Brilliant Blue with Pulsed Ultraviolet Light Emitting Diodes

Scott, Robert W. J.; Mudimbi, Patrick M; Miller, Michael E.; Magnuson, Matthew L.; Willison, Stuart A.; Phillips, Rebecca; Harper, Willie F.

doi:10.2175/106143016x14733681696167

Cited by 16 publications

(7 citation statements)

References 31 publications

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“…Scott et al reported the oxidative degradation under UV light of Tz and BB, which resulted in a slow process. After 300 min of UV light exposure, 83% of BB and only 17% of Tz underwent degradation [47]. Taking into account that using silver nanoparticles as catalysts of the degradation reactions of the above mentioned dyes, Tz concentration lowered by 26% after 45 min of reaction and 97% of BB was removed after 15 min, is highly recommended to use the catalytic degradation of these dyes instead of their UV light mediated oxidation.…”

Section: Dye Reducing Catalytic Activity Of Agnpsmentioning

confidence: 99%

Green Synthesis of Biogenic Silver Nanoparticles for Efficient Catalytic Removal of Harmful Organic Dyes

2020

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The present article reports an environmentally benign method for synthesizing silver nanoparticles using the fruit extract of Viburnum opulus L. as a source of bioactive compounds, which can act as reducing agents of the silver ions and also as stabilizing agents of the obtained nanoparticles. The catalytic ability of the synthesized silver nanoparticles (AgNPs) to remove toxic organic dyes was also evaluated. The biosynthesis of silver nanoparticles was firstly confirmed by UV-Vis spectral analysis, which revealed the presence of the characteristic absorption peak at 415 nm corresponding to the surface plasmon vibration of colloidal silver. Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) studies were conducted to confirm the presence of bioactive phytocompounds, especially phenolics, as capping and stabilizing agents of the AgNPs. The size, morphology and crystalline nature of the synthesized AgNPs were investigated by transmission electron microscopy and X-ray diffraction techniques revealing that the obtained nanoparticles were spherical shaped, with an average diameter of 16 nm, monodispersed, face centered cubic nanoparticles. Further, the catalytic ability in the degradation of tartrazine, carmoisine and brilliant blue FCF dyes by NaBH4 was evaluated. The results demonstrated an efficient activity against all the investigated dyes being an outstanding catalyst for the degradation of brilliant blue FCF. This eco-friendly synthetic approach can generate new tools useful in environmental pollution control.

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Section: Dye Reducing Catalytic Activity Of Agnpsmentioning

confidence: 99%

Green Synthesis of Biogenic Silver Nanoparticles for Efficient Catalytic Removal of Harmful Organic Dyes

2020

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“…Similarly, Scott et al. (2017) studied the degradation of tartrazine and Brilliant Blue in solutions containing hydrogen peroxide exposed to UV light; here again, the hydroxyl radicals produced catalyzed the reaction and could serve as a means for removing the colorants from wastewater. These studies were attempting to intentionally decolorize the solutions.…”

Section: Resultsmentioning

confidence: 99%

“…Oancea and Meltzer (2014) reported fast degradation of tartrazine in solutions containing hydrogen peroxide; upon UV light exposure, hydrogen peroxide F I G U R E 1 Degradation of tartrazine in iron-containing solutions at pH 3 and 30°C as affected by UV light exposure (365 nm, 39 μW/cm 2 ) modeled via pseudo-first-order kinetics F I G U R E 2 Degradation of Allura Red in 0.05 M citrate buffer and water with and without 3.6 ppm iron at pH 3 and 30°C during UV light exposure (365 nm, 39 μW/cm 2 ) modeled via pseudo-zeroorder kinetics undergoes photolysis to yield hydroxyl radicals that react with tartrazine. Similarly, Scott et al (2017) studied the degradation of tartrazine and Brilliant Blue in solutions containing hydrogen peroxide exposed to UV light; here again, the hydroxyl radicals produced catalyzed the reaction and could serve as a means for removing the colorants from wastewater. These studies were attempting to intentionally decolorize the solutions.…”

Section: Colorant Stability Upon Uv Light Exposurementioning

confidence: 99%

Ingredient photostability as affected by iron: Colorant degradation

James

Bell

2020

J. Food Process. Preserv.

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Composition and storage parameters affect the chemical stability of foods and beverages. Temperature, water activity, oxygen levels, pH, buffer salts, carbonyl compounds, and minerals are some of the variables that influence chemical reactions within the food (Bell, 2007). Vitamin degradation, color loss, and flavor changes are examples of unwanted chemical reactions that may occur in food products. These chemical changes will consequently lessen the product's quality and shelf life. Understanding ways to minimize the rates of these reactions is, therefore, an important aspect of food product development. The food industry has utilized artificial colors for decades. Colors certified for food use by the Federal Food, Drug and Cosmetic Act are classified as FD&C colors (Francis, 1999). Some examples of FD&C colors include Brilliant Blue (FD&C Blue No. 1), tartrazine (FD&C Yellow No. 5), and Allura Red (FD&C Red No. 40). In his overview of colorant stability, Francis (1999) noted tartrazine and Allura Red have good stability in acid and upon light exposure; Brilliant Blue also has good stability in acid but slightly lower stability when exposed to light. Degradation of the colorant would result in the gradual fading of the respective color until complete decolorization occurs, resulting in food quality being compromised. The degradation of rebaudioside A, a natural sweetener, is another reaction that can lessen a food's shelf life. Zhang and Bell (2017) noted that rebaudioside A degradation in solution was enhanced by exposure to ultraviolet (UV) light. Further investigations found that degradation occurred faster in the presence of iron (Toohey & Bell, 2019). The fastest degradation was observed when solutions containing both citrate and iron were exposed to UV light

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“…To compare the reactivity of the K 2 S 2 O 8 /AgNPs system, the degradation % and rate constants of different dyes with H 2 O 2 and other metal NPs are summarized in Table . It is well known that the experimental conditions such as the type of irradiation and metal NPs have significant impact on the degradation of dyes. − K 2 S 2 O 8 /AgNPs is found to be more active to the E133 degradation compared to others. AgNPs activate the peroxide bond of S 2 O 8 2– and generate the oxygen reactive species (SO 4 · – and HO · ), which might be responsible for the degradation of toxic wastewater pollutants.…”

Section: Resultsmentioning

confidence: 99%

Photo-oxidative Decolorization of Brilliant Blue with AgNPs as an Activator in the Presence of K₂S₂O₈ and NaBH₄

et al. 2021

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The decolorization of brilliant blue (E133) in aqueous solution by K2S2O8 and NaBH4 with AgNPs as an activator was studied spectrophotometrically under normal laboratory conditions. Batch experiments were performed to investigate the effects of reaction time, initial dye concentration, activator concentration, solution pH, and temperature on the decolorization of E133. K2S2O8 and NaBH4 did not decolorize the dye E133 in the absence of AgNPs. The optimum dosage of AgNPs was 0.01 g/L, and 98% dye E133 degradation was observed with 3.75 mM K2S2O8 at 30 °C in ca. 60 min of reaction time. In the NaBH4/AgNPs system, only 60% dye degradation was observed for an identical reaction condition. The decolorization rate constant increases with the increase in concentrations of AgNPs, K2S2O8, NaBH4, and reaction temperature. The decolorization degree of the E133 responded linearly with K2S2O8 and NaBH4 concentrations. The existence of sulfate radicals (SO4 · –) and hydroxyl radicals (HO·) generated during the decolorization of E133 was identified by using ethanol and tertiary butyl alcohol as scavengers. Based on the E133 solution absorbance changes at 628 nm, the decolorization mechanism was proposed and discussed.

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Advanced Oxidation of Tartrazine and Brilliant Blue with Pulsed Ultraviolet Light Emitting Diodes

Cited by 16 publications

References 31 publications

Green Synthesis of Biogenic Silver Nanoparticles for Efficient Catalytic Removal of Harmful Organic Dyes

Green Synthesis of Biogenic Silver Nanoparticles for Efficient Catalytic Removal of Harmful Organic Dyes

Ingredient photostability as affected by iron: Colorant degradation

Photo-oxidative Decolorization of Brilliant Blue with AgNPs as an Activator in the Presence of K₂S₂O₈ and NaBH₄

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Advanced Oxidation of Tartrazine and Brilliant Blue with Pulsed Ultraviolet Light Emitting Diodes

Cited by 16 publications

References 31 publications

Green Synthesis of Biogenic Silver Nanoparticles for Efficient Catalytic Removal of Harmful Organic Dyes

Green Synthesis of Biogenic Silver Nanoparticles for Efficient Catalytic Removal of Harmful Organic Dyes

Ingredient photostability as affected by iron: Colorant degradation

Photo-oxidative Decolorization of Brilliant Blue with AgNPs as an Activator in the Presence of K2S2O8 and NaBH4

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Photo-oxidative Decolorization of Brilliant Blue with AgNPs as an Activator in the Presence of K₂S₂O₈ and NaBH₄