Evaluation of advanced oxidative processes in biodiesel wastewater treatment

Brito, Gabriel Ferreira da Silva; Oliveira, Rhaul; Grisólia, César Koppe; Guirra, Layanne Souza; Weber, Ingrid Távora; Almeida, F.

doi:10.1016/j.jphotochem.2019.01.013

Cited by 25 publications

(10 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Os Processos Oxidativos Avançados (POA), baseiam-se na atuação de radicais com alto poder oxidante, geralmente a hidroxila (HO•), com o intuito de degradar poluentes orgânicos, gerando produtos mais simples ou não poluentes, como água, sais inorgânicos ou dióxido de carbono (CO2) (Brito et al, 2019). O mecanismo de abstração de hidrogênio é o mais comum quando se explica a interação entre o radical hidroxila e a matéria orgânica, Equações 4 e 5, onde, num meio aerado, há formação de radicais orgânicos, que podem formar substâncias mais simples após consecutivas etapas de reação, por meio de reações em cadeia; no entanto, devido a alta reatividade e baixa seletividade desse radical, deve-se atentar à formação de poluentes orgânicos persistentes (Araújo et al, 2016).…”

Section: Resultsunclassified

“…Os POAs que se destacam são os químicos, foto-químicos, eletroquímicos e combinações entre esses (Araújo et al, 2016). O POA químico de maior interesse é o processo Fenton, que baseia-se na formação de radicais hidroxila via interação entre íons ferrosos, Fe 2+ , e agentes oxidantes fortes, como peróxido de hidrogênio, em meio aquoso (Equação 6) (Brito et al, 2019).…”

Section: Resultsunclassified

“…Se tratando do processo Fenton, Nascimento (2020), Brito et al (2019) e Vecchio (2019) propuseram-se a investigá-lo. Sob justificativas similares às de Vieira et al (2015), Brito et al (2019) investigaram a viabilidade da redução do teor de carbono orgânico da água residual do processo de produção de biodiesel de soja através do processo Fenton, utilizando H2O2 como agente oxidante, com proporção de Fe 2+ :H2O2 de 1:50 e com tempo de reação de 300 minutos. Desse sistema, os autores relataram um resultado pouco satisfatório, com uma média de 8,5% de remoção após os 300 minutos de reação.…”

Section: Resultsunclassified

See 2 more Smart Citations

Processos físicos e químicos para o tratamento de efluentes: uma revisão integrativa

Azevedo¹,

Cavalcanti²

2020

Rev. Bras. Gest. Amb. Sustent.

View full text Add to dashboard Cite

O aumento da produção industrial, provocado pelo crescimento da população mundial, tem gerado uma maior carga de poluentes, dentre eles, os efluentes, comprometendo recursos hídricos. A fim de mitigar os impactos ao meio ambiente, métodos de tratamentos de efluentes têm sido amplamente estudados, sendo os físicos (adsorção, coagulação/floculação) e os químicos (processos oxidativos) os principais. O presente trabalho traz uma revisão integrativa e principais resultados encontrados na literatura especializada para esses métodos, no tratamento de diversos tipos de efluentes. Diante disso, esse trabalho poderá servir de base para fundamentação teórica para pesquisas sobre tratamentos de efluentes, uma vez que foram reunidos e discutidos conceitos e resultados acerca destes tratamentos.

show abstract

Section: Resultsunclassified

See 1 more Smart Citation

Processos físicos e químicos para o tratamento de efluentes: uma revisão integrativa

Azevedo¹,

Cavalcanti²

2020

Rev. Bras. Gest. Amb. Sustent.

View full text Add to dashboard Cite

show abstract

“…These processes are capable of degrading pollutants by means of the oxidization of organic compounds, from those which are complex to those which are simpler. For example, wastewater treatments with biodiesel [20], volatile organic compounds [21] and the degradation of pharmaceuticals [22,23].…”

Section: Introductionmentioning

confidence: 99%

Degradation of Oxytetracycline in Aqueous Solutions: Application of Homogeneous and Heterogeneous Advanced Oxidative Processes

et al. 2020

View full text Add to dashboard Cite

Oxytetracycline is one of the antibiotics most frequently used in the Shrimp Industry during the control of bacterial diseases. These emerging pollutants, which appear in low concentrations, are persistent and alternative treatments and are required for their elimination. The degradation of oxytetracycline was evaluated in an aqueous solution by applying homogeneous (UV/H2O2 and photo-Fenton) and heterogeneous (UV/TiO2/H2O2) advanced oxidative processes (AOPs). The studies were carried out using a bench reactor with short-wave ultraviolet lamps (UV-C). We quantified the extent to which the degradation of the drug had been efficient by employing highly efficient liquid chromatography (HPLC) and a PDA detector with a wavelength of 354 nm and a C18 column. The best results were obtained when applying the UV/H2O2 treatment, which attained a degradation of 97% under the initial conditions of a dose of 8 µL of H2O2 and 120 min of radiation. The pseudo-first order kinetic model proposed by Chan and Chu showed that the experimental results had an adequate fit, with values greater than R2 ≥ 0.95. Toxicity tests were applied to verify the effect of AOPs employed, when the drug was present in low concentrations. The test results demonstrated a decrease in the root growth of the species Lactuca sativa and Daucus carota.

show abstract

“…It is responsible for the transformation of organic molecules into carbon dioxide and water, which have attracted the interest of the scientific community (Kanakaraju et al, 2018). AOPs are chemical oxidation techniques based on hydroxyl radical formation (OH•), a high oxidant able to degrade organic matter in liquid effluents (Vilardi et al, 2018;Brito et al, 2019). In these processes, the hydroxyl radicals act in a non-selective way and allow the degradation of numerous toxic organic contaminants.…”

Section: Introductionmentioning

confidence: 99%

Treatment of swine wastewater using the Fenton process with ultrasound and recycled iron

et al. 2020

View full text Add to dashboard Cite

Pork production involves the generation of wastewater containing a high pollutant load. Although the biological systems show satisfactory efficiency for the treatment of these effluents, they demand an elevated area for installation and high production of biological sludge. Alternatively, oxidative processes are an alternative for treating such effluents, requiring minor areas and increasing the efficiency of the treatment. We studied the Fenton process assisted with ultrasound for the treatment of swine slaughterhouse wastewater. Nails used in civil construction were used as the iron source. We evaluated the influence of pH, contact time, nail mass, and hydrogen peroxide concentration on color removal, turbidity, chemical oxygen demand (COD) and biochemical oxygen demand (BOD5). The removal of nutrients and oils and greases was also evaluated. The best results using the ultrasound-assisted Fenton process were obtained at pH 3, hydrogen peroxide concentration 90 mg L-1, and a nail unit (2.7g). In these conditions, color, turbidity, COD, and BOD5 removal of 98, 98.2, 84.6, and 98%, respectively, were achieved. The reduction in the other parameters evaluated was above 70%. Catalytic activity maintained above 90% until the sixth cycle of use. In general, the ultrasound-assisted Fenton process using the nail as a catalyst would be an alternative for the treatment of swine slaughterhouse wastewater. This alternative is responsible for the higher removal of organic load and nutrients in a shorter time when compared with biological systems.

show abstract

Evaluation of advanced oxidative processes in biodiesel wastewater treatment

Cited by 25 publications

References 26 publications

Processos físicos e químicos para o tratamento de efluentes: uma revisão integrativa

Processos físicos e químicos para o tratamento de efluentes: uma revisão integrativa

Degradation of Oxytetracycline in Aqueous Solutions: Application of Homogeneous and Heterogeneous Advanced Oxidative Processes

Treatment of swine wastewater using the Fenton process with ultrasound and recycled iron

Contact Info

Product

Resources

About