Tratamento de efluentes de lavanderia hospitalar por processo oxidativo avançado: UV/H2O2

Souza, Renata Cristina; Silva, Thiago Lopes da; Santos, Alessandra Zacarias dos; Tavares, C. R. G.

doi:10.1590/s1413-41522019092923

Cited by 13 publications

(10 citation statements)

References 21 publications

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“…Souza et al [6] treated hospital laundry wastewater by applying H2O2 as a function of COD in the following ratios [COD]:[H2O2]. high catalyst concentration [1:5.0], medium catalyst concentration [1:2.5] and low catalyst concentration [1:0.5].…”

Section: B Sampling and Analysismentioning

confidence: 99%

“…high catalyst concentration [1:5.0], medium catalyst concentration [1:2.5] and low catalyst concentration [1:0.5]. The same ratios [COD]:[H2O2] applied by Souza and collaborators [6] for high and medium catalyst concentrations were used in this study. However, a low concentration was fixed at [1:0.3] to optimize catalyst addition.…”

Section: B Sampling and Analysismentioning

confidence: 99%

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Linear Alkylbenzene Sulfonate Removal by Oxidative Ozonation Coupled with UV/H2O2 Oxidative Process

Terán

Santos

Silva

et al. 2022

EJENG

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In this study, the results of the application of advanced oxidative processes to remove linear alkylbenzene sulfonate (LAS) from wastewater produced in the laundry industry are presented. Photocatalysis with UV radiation and oxygen peroxide (H2O2) was applied followed by ozonation (O3). LAS removal was higher than 90% in the first 60 min. H2O2 application based on COD reached its most effective concentration for the rate of [1:2.5] with O3 acting as a polishing agent. Excessive foam formation caused by the bubbling effect led to the necessity of introducing a lag into the process, retarding the O3 application in 30 min. Therefore, complete oxidation was achieved with a low concentration of LAS, and no foam was observed by the end of the process. The best COD removal results were achieved when low doses of H2O2 were applied. Using UV/H2O2/O3, 51.2% removal was achieved.

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Section: B Sampling and Analysismentioning

confidence: 99%

Section: B Sampling and Analysismentioning

confidence: 99%

Linear Alkylbenzene Sulfonate Removal by Oxidative Ozonation Coupled with UV/H2O2 Oxidative Process

Terán

Santos

Silva

et al. 2022

EJENG

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“…Obtiveram como resultado um aumento de remoção de 36,4% de DQO (demanda química de oxigênio), com relação ao efluente pré-tratado por coagulação-floculação com FeCl 3, o qual apresentava 637,2 mg L -1 de matéria orgânica. Souza et al (2019), por sua vez, trataram com H 2 O 2 /UV efluente de lavanderia hospitalar. O efluente bruto apresentava concentrações iniciais de 217 mg L -1 de DQO, 368 uH de cor e 76 UNT de turbidez.…”

Section: Processo H 2 O 2 /Uvunclassified

A Influência Das Vertentes Na Gestão Urbana

Bonifácio¹,

Nóbrega²

2021

Gestão Urbana Sustentável, Águas Urbanas

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O processo de urbanização desenfreada torna o meio físico vulnerável às ações antrópicas, e condiciona a vários problemas de ordem socioambientais. O excesso de superfícies impermeabilizadas, resultante do acelerado crescimento urbano, reduz a infiltração da água da precipitação e aumenta a velocidade do escoamento da água em superfície, neste sentido, provoca alterações morfológicas nas vertentes e no funcionamento dos fluxos hídricos superficiais e subsuperficiais. À medida que a impermeabilização produzida pela urbanização aumenta, as alterações são mais intensas e os riscos de degradação tornam-se mais críticos. O conhecimento da dinâmica das vertentes e dos efeitos da urbanização sobre ela, fornecem subsídios para um planejamento urbano sustentável.

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“…As a consequence, its main C/F mechanisms are considerably impaired. Souza 172 points out that the addition of CS in effluents with a pH above 9, in addition to not observing the formation of flakes, the treatment was ineffective. Thus, before adding coagulant, the pH was adjusted according to Table 2.…”

Section: Materials and Equipmentmentioning

confidence: 99%

Use of Natural Coagulants/Flocculants in the Treatment of Hospital Laundry Effluents

Abreu

Montel²,

Scapin³

2020

Preprint

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<p>Water is a fundamental substance for the existence of life on earth. However, globally there is a freshwater crisis. Hospitals generate exorbitant volumes of effluents (5 to 15 times more toxic than urban ones). Hospital laundry is known for demanding the highest volumes of water, generating a proportional amount of complex effluents with high toxicity and recalcitrance. Adequate treatment for hospital wastewater is always an essential solution. Among all treatment methods, coagulation/flocculation emerges as one of the best alternatives. However, the use of traditional compounds such as aluminium sulfate has caused secondary pollution; its residues are harmful to public and environmental health. In this sense, the present study used natural compounds that do not cause adverse effects, such as chitosan/hydroxyapatite, to clarify the laundry effluents of the largest hospital from the Tocantins. The results showed that the hydroxyapatite associated with chitosan, at pH 6 and dosage of 50 mg/L, reduced the turbidity and apparent colour of these wastewaters by up to 67 and 55%, respectively. With lower performance and higher dosage (60 mg/L), the chitosan gel used (pH 6) promoted a maximum reduction of 35% of the apparent colour and 40% of turbidity.<br></p>

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Tratamento de efluentes de lavanderia hospitalar por processo oxidativo avançado: UV/H2O2

Cited by 13 publications

References 21 publications

Linear Alkylbenzene Sulfonate Removal by Oxidative Ozonation Coupled with UV/H2O2 Oxidative Process

Linear Alkylbenzene Sulfonate Removal by Oxidative Ozonation Coupled with UV/H2O2 Oxidative Process

A Influência Das Vertentes Na Gestão Urbana

Use of Natural Coagulants/Flocculants in the Treatment of Hospital Laundry Effluents

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