Tratamento de efluentes industriais por processos oxidativos na presença de ozônio

Almeida, Edna dos Santos; Assalin, Márcia Regina; Rosa, Maria Aparecida; Durán, Nelsón

doi:10.1590/s0100-40422004000500023

Cited by 75 publications

(80 citation statements)

References 43 publications

(93 reference statements)

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“…Therefore, a series of diverse compounds may be present, such as veterinary drugs administered to the animals through feed and excreted by them in urine, and sanitizer agents and pesticides used in the cleaning and disinfection of the work environment (Genena, 2009). These compounds, which are persistent compounds, are very harmful to the environment, presenting high toxicity and bioaccumulation (Almeida et al, 2004). They are complex and often difficult to degrade in the biological treatment systems commonly present in industrial wastewater treatment plants.…”

Section: Poultry Hatchery Wastewater Treatmentmentioning

confidence: 99%

Sustainability of Wastewater Treatment and Excess Sludge Handling Practices in the Federated States of Micronesia

2015

Water Treatment in Developed and Developing Nations

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Section: Poultry Hatchery Wastewater Treatmentmentioning

confidence: 99%

Sustainability of Wastewater Treatment and Excess Sludge Handling Practices in the Federated States of Micronesia

2015

Water Treatment in Developed and Developing Nations

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“…A decomposição do ozônio pode ser acelerada pelo aumento do pH, pela adição de peróxido de hidrogênio ou pela radiação UV. 126 Desta maneira, a oxidação de quinolonas durante a ozonização pode ocorrer via ozônio molecular (reação direta -predominante em meio ácido) ou radical hidroxila (reação indireta -predominante em meio básico). Em meio neutro, ambos oxidantes podem estar atuando.…”

Section: Ozôniounclassified

Occurrence and Degradation of Quinolones by Advanced Oxidation Processes

Rodrigues-Silva¹,

Maniero²,

Peres³

et al. 2014

Química Nova

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OCCURRENCE AND DEGRADATION OF QUINOLONES BY ADVANCED OXIDATION PROCESSES. In this review, the presence of quinolones in the environment, their risks and the available processes for water decontamination were addressed. Their occurrence in surface waters and also in soil raises concerns about the risk of the development of resistant bacteria and other potential chronic effects. AOPs (UV/H 2 O 2 , Fenton, photo-Fenton, and UV/TiO 2 ) and ozonation proved effective for degrading these emerging contaminants due to hydroxyl radical formation, surpassing the efficacy of conventional methods. In addition, the main degradation mechanisms of these drugs as well as data on residual biological activity were analyzed.Keywords: antimicrobials; degradation mechanisms; toxicity. INTRODUÇÃOAntimicrobianos são definidos como compostos naturais, sinté-ticos ou semi-sintéticos, cuja finalidade é prevenir ou tratar doenças infecciosas causadas por micro-organismos patogênicos, 1 tanto nos seres humanos como na medicina veterinária. Visto que não são totalmente metabolizados durante o uso terapêutico, os antimicrobianos estão presentes no esgoto doméstico principalmente como resultado da excreção humana. O uso de antimicrobianos na atividade pecuária contribui, também, para a sua introdução no meio ambiente, como resultado de processos de manufatura, disposição irregular ou excreção metabólica.2 Dessa forma, esses compostos são continuamente lançados no ambiente e, considerando sua característica recalcitrante de difícil remoção/degradação, são considerados pseudopersistentes.Existem aproximadamente onze diferentes classes de antimicrobianos, 3 que se diferenciam por sua estrutura química ou mecanismos de ação no tratamento específico de determinado patógeno. As quinolonas, antimicrobianos sintéticos, são eficientes no tratamento de infecções por bactérias Gram-positivas e Gram-negativas e são largamente empregadas tanto na medicina humana como veteriná-ria. Bactérias Gram-negativas são aquelas que possuem uma parede celular com poucas camadas de peptideoglicana e uma segunda membrana de lipopolissacarídeo. No processo de coloração, a lavagem com álcool rompe a camada externa de lipopolissacarídeo e o corante é removido por meio da camada de peptideoglicana. Consequentemente, as células Gram-negativas permanecem incolores até serem coradas com a safranina (segundo corante), adquirindo tonalidade rosa-avermelhada. Como exemplo, pode-se citar: Pseudomonas aeruginosa (causadora de infecções no aparelho pulmonar, urinário e respiratório), Escherichia coli (causadora de infecções urinárias) e Salmonella (causadora de intoxicações alimentares). As bactérias Gram-positivas, como por exemplo, a Streptococcus pneumoniae, possuem uma parede com mais camadas de peptideoglicana que as bactérias Gram-negativas. Empregando-se a coloração de Gram, apresentam-se com coloração púrpura quando fixadas com cristal violeta (primeiro corante), uma vez que essas bactérias retêm esse corante mesmo quando expostas ao álcool. 4,5 Dentre os principais riscos ...

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“…The ozone in its gaseous or aqueous phases is effective against the majority of microorganisms tested by numerous research groups (2,4,5,6,26). Low concentrations and shortterm contact are enough to inactivate bacteria, mold yeast, protozoa algae and fungi (10,11,12,20).…”

Section: Introductionmentioning

confidence: 99%

The use of ozonized oil in the treatment of dermatophitosis caused by Microsporum canis in rabbits

Daud

Ueda

Navarini

et al. 2011

Braz. J. Microbiol.

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The ozone is effective against most microorganisms due to its high oxidant power. Low concentrations and short-term contact are sufficient to inactivate bacteria, mold, yeast, parasites, seaweeds, protozoa and fungi. Microsporum canis is an important agent of dermatophitosis in human and animal. The aim of the current study was to assess the efficacy of ozonized oil over Microsporum canis in rabbits. Eighteen male New Zealand white rabbits, weight ranging from 2 to 3.2 kg were depilated in the cranial dorso-lateral and right caudal, and cranial and left caudal regions. The regions were inoculated with Microsporum canis, excepting the right caudal region, and were denominated TM, O, OM and M, respectively. After seven days, the treatment of lesions in TM began with 0.12g of terbinaphine 1% cream; in OM and O with 0.12g of ozonized oil; all animals were treated once a day for 28 days. Region M was not treated. Material was collected from those regions for cultivation in Sabouraud agar at day 28 of treatment. In the evolution of the treatment with terbinaphine, of 14 contaminated regions with Microsporum canis ten evolved to cure.With the ozonized oil, of 15 contaminations, four were cured. Clinically, that is, the macroscopic evaluation of lesions showed improvement in the TM and OM treated regions. We can conclude that there was statistical evidence of the protection action of the oil against the dermatophyte.

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Tratamento de efluentes industriais por processos oxidativos na presença de ozônio

Cited by 75 publications

References 43 publications

Sustainability of Wastewater Treatment and Excess Sludge Handling Practices in the Federated States of Micronesia

Sustainability of Wastewater Treatment and Excess Sludge Handling Practices in the Federated States of Micronesia

Occurrence and Degradation of Quinolones by Advanced Oxidation Processes

The use of ozonized oil in the treatment of dermatophitosis caused by Microsporum canis in rabbits

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