Recent developments in the coupling of photoassisted and aerobic biological processes for the treatment of biorecalcitrant compounds

Sarria, V.; Parra, S.; Adler, N.; Péringer, Paul; Benítez, Norberto; Pulgarín, C.

doi:10.1016/s0920-5861(02)00228-6

Cited by 247 publications

(136 citation statements)

References 24 publications

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“…The degradation of dyes has become increasingly important during the last decade in the field of Advanced Oxidation Technologies (AOT's) [1][2][3][4][5]. Azo-dyes like Orange II represent more than 15% of the world production of dyes used in the textile manufacturing industry.…”

Section: Introductionmentioning

confidence: 99%

Bleaching and photobleaching of Orange II within seconds by the oxone/Co2+ reagent in Fenton-like processes

Fernández

Maruthamuthu

Renken

et al. 2004

Applied Catalysis B: Environmental

125

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Accelerated bleaching, photobleaching and mineralization of the non-biodegradable azo-dye, Orange II, was observed with oxone in solutions with Co 2+ -ions. The bleaching rate of Orange II in the dark was found to follow a first-order kinetics with respect to [Co 2+ ] with a rate constant of 20 M −1 s −1 . Fitting of the Orange II photobleaching experimental points in the presence of the Co 2+ /oxone reagent was carried out and followed the trend known for reactions presenting a chain radical branched mechanism. The photobleaching trace could be fitted by a single mathematical expression with an error <5% with respect to the experimental data. The bleaching trace observed for the Orange II solution in the dark followed zero-order decay kinetics. In a typical run, Orange II (0.20 mM or TOC 30 mg C/l) in the presence of oxone and Co 2+ was bleached under visible light within ∼15 s. The Co 2+ -ion concentrations necessary to catalyze the Orange II mineralization by oxone was observed to be ∼100 times lower than the oxone concentration. A 100% TOC decrease, under visible light irradiation, was attained for an Orange II (0.2 mM) solution in the presence of Co 2+ -ions (0.06 mM) and oxone (20 mM) within times ∼70 min for solutions purged with oxygen. Under visible light irradiation, Orange II mineralization in the presence of O 2 involves the photo-dissociation of reaction intermediates leading to organic peroxides in the second step of the mineralization process.

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Section: Introductionmentioning

confidence: 99%

Bleaching and photobleaching of Orange II within seconds by the oxone/Co2+ reagent in Fenton-like processes

Fernández

Maruthamuthu

Renken

et al. 2004

Applied Catalysis B: Environmental

125

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“…Technologies based on Advanced Oxidative Processes (AOPs), which promote chemical changes in the substrate, can also lead to the complete mineralization of metallic chemical elements [11,12]. In addition, AOPs may be used to treat contaminants whose concentration is very low (ppb) [13,14], as it happens to some metals.…”

Section: Journal Of Bioremediation and Biodegradationmentioning

confidence: 99%

Applying Ionizing Radiation to Metal Speciation for the Environmental Assessment of Underground Aquifer Associated with Technogenic Landfill Containing Sludge from A Water Treatment Plant (WTP)

Ral¹,

R²,

Abda³

2018

J Bioremediat Biodegrad

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This study was carried out in a technogenic landfill of sludge from the Taiaçupeba Water Treatment Station, Suzano, Brazil. The availability of this residue is a problem, since the presence of heavy metals in the sludge increases the risk of contamination of the physical environment, especially the soils and groundwater. The metal dosage methodologies in the samples took into account the presence of organic matter, and the use of technologies based on Advanced Oxidative Processes (AOPs) were applied to lead to the complete mineralization of metallic chemical elements. The results indicated that the irradiated samples presented higher metals dosages in relation to the non irradiated samples. The application of water analysis techniques through advanced oxidation processes (AOP) such as radiolysis indicated that contents found in environments containing high organic matter concentration, such as the samples collected in the technogenic landfill where the sludge was deposited, presented different values from those analyzed through conventional techniques.

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“…La relación entre la constante de reacción y la temperatura se expresa mediante la Ecuación de Arrhenius: 13 (9) donde k ap = constante de velocidad de reacción, E a = energía de activación, R= constante de los gases, T= temperatura a la que ocurre la reacción, A= factor de frecuencia.…”

Section: Efecto De La Temperaturaunclassified

“…9 En los últimos años se han desarrollando procesos para degradar disruptores endocrinos a través de POA´s. El BPA fue degradado por medio de foto-catálisis con TiO 2 en china en el 2005, 6 la foto degradación con UV/H 2 O 2 de estradiol (E2), etenil estradiol, nonifenol (NP), Bisfenol A (BPA), se evaluó en Estados Unidos en el 2006.…”

Section: Introduccionunclassified

Fotodegradación heterogénea de bisfenol A en agua con dióxido de titanio

Gómez¹,

Sarria²

2009

Quím. Nova

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Recebido em 14/5/08; aceito em 5/12/08; publicado na web em 11/5/09 HETEROGENEOUS PHOTODEGRADATION OF BISPHENOL A IN WATER WITH TITANIUM DIOXIDE. Bisphenol A (BPA) is a monomer used in epoxy resin and polycarbonate manufacture. This molecule is considered as an endocrine disruptor that causes different diseases. The human exposition to this non biodegrable substance is increasing in the time; in particular, water is contaminated by industrial remainder flow. In this article heterogeneous photo degradation of a solution of BPA in water solution using a catalytic photo reactor with UV light and titanium dioxide (TiO 2 ) was evaluated. High performance liquid chromatography (HPLC) was used to analyze the photo degradation of BPA solutions. The influence of titanium dioxide amount, BPA concentration, reaction temperature and the catalyst state like suspension and immobilized were also determinated. The highest elimination of BPA was 83.2%, in 240 min, beginning with 0.05 mM of BPA and 100 mg/L of TiO 2 in suspension.Keywords: photo degradation; TiO 2 ; Bisphenol A. INTRODUCCIONActualmente se estima que en promedio 2.000 sustancias quími-cas, se incorporan anualmente al medio ambiente y a la vida humana. El hombre y su entorno resultan expuestos a estos compuestos desde el momento de su fabricación hasta su distribución, uso y posible degradación. La literatura científica especializada relaciona este crecimiento tan acelerado, como causa de nuevos síndromes y desarrollo de nuevas enfermedades. 1 Se ha presumido recientemente que ciertos productos químicos denominados como disruptores endocrinos tienen la capacidad de alterar el equilibrio hormonal y causar efectos adversos para la salud de los seres humanos y de la fauna, a concentraciones muy bajas. [1][2][3] La exposición de los seres vivos a estas sustancias es cada vez mayor, ya que son ampliamente utilizados, poseen baja degradabilidad, son transportados por aire, suelo y agua, además pueden bioacumularse en la cadena trófica debido a que se almacenan en la grasa de los organismos y son transmitidos a la descendencia a través de la madre durante la gestación y después de la lactancia. 1,4 El Bisfenol A (BPA) fue catalogado como disruptor endocrino según el ministerio del medio ambiente en Japón. 5 Esta sustancia es un monómero ampliamente utilizado en la industria de polímeros, resinas epóxicas y policarbonatos. Estudios atribuyen a esta sustancia; poliquistesis ovárica, problemas de fertilidad femenina, cromosomas fetales anormales, feminización, alteraciones reproductivas inmunológicas y de desarrollo. 5,6 Según la literatura se ha encontrado trazas de Bisfenol A en aire (2-208 ng/m 3 ), suelo y agua (8-21 ng/ml). 7 Se ha demostrado que esta sustancia contenida en resinas epóxicas como los productos enlatados alimenticios, puede migrar desde las paredes del material hasta el interior del producto. Se ha identificado trazas de BPA en animales marinos disponibles para el consumo humano. 7 Debido a las anteriores evidencias, varios países han restringido la conce...

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Recent developments in the coupling of photoassisted and aerobic biological processes for the treatment of biorecalcitrant compounds

Cited by 247 publications

References 24 publications

Bleaching and photobleaching of Orange II within seconds by the oxone/Co2+ reagent in Fenton-like processes

Bleaching and photobleaching of Orange II within seconds by the oxone/Co2+ reagent in Fenton-like processes

Applying Ionizing Radiation to Metal Speciation for the Environmental Assessment of Underground Aquifer Associated with Technogenic Landfill Containing Sludge from A Water Treatment Plant (WTP)

Fotodegradación heterogénea de bisfenol A en agua con dióxido de titanio

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