Effect of humic substances on the Fenton treatment of wastewater at acidic and neutral pH

Lipczyńska-Kochany, Ewa; Kochany, Jan

doi:10.1016/j.chemosphere.2008.06.028

Cited by 148 publications

(69 citation statements)

References 30 publications

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“…Son sustancias sólidas, cristalinas e incoloras, aunque a veces aparecen coloreadas debido a fenómenos de oxidación. Poseen olor característico, pueden destilarse sin lugar a descomposición y con frecuencia pueden ser arrastrados por vapor de agua (Lipczynska-Kochany, et al, 2008).…”

Section: Figura 1 Estructura Del áCido Para-hidroxibenzóicounclassified

“…Con respecto al hidrocarburo de donde proviene cada fenol, el grupo hidroxilo tiene influencia sobre las propiedades físicas de dichos compuestos: el punto de fusión y el punto de ebullición son considerablemente elevados, igualmente la solubilidad en agua aumenta a medida que aumenta el número de hidroxilos presentes, en el caso de los fenoles la formación de asociaciones moleculares COOH OH mediante puentes de Hidrógeno, es más fuerte en comparación con los alcoholes alifáticos (Lipczynska-Kochany, et al, 2008).…”

Section: Figura 1 Estructura Del áCido Para-hidroxibenzóicounclassified

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Evaluación del método Fenton para tratamientos de aguas industriales en ingeniería

P.¹,

G.²

2012

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Section: Figura 1 Estructura Del áCido Para-hidroxibenzóicounclassified

Evaluación del método Fenton para tratamientos de aguas industriales en ingeniería

P.¹,

G.²

2012

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“…The complex fraction of natural organic matter known as humic acids has also attracted some interest due to its ubiquitous presence in natural waters [18,19]. Treatment of heavily contaminated industrial wastewater has been shown to be efficient at neutral pH with the addition of humic acids [20]. However, for treating contaminants at the g L −1 level in neutral pH MWTP effluent, degradation rate was slow and the residual pH acidic, requiring adjustment prior to release [21].…”

Section: Introductionmentioning

confidence: 99%

Microcontaminant degradation in municipal wastewater treatment plant secondary effluent by EDDS assisted photo-Fenton at near-neutral pH: An experimental design approach

et al. 2015

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a b s t r a c tThis work aims to evaluate the applicability of EDDS (ethylenediamine-N,N -disuccinic acid) as an iron chelating agent for photo-Fenton treatment of municipal wastewater spiked with organic contaminants at near-neutral pH. A series of laboratory scale experiments are conducted under simulated sunlight in accordance with a central composite experimental design in order to define the most favorable conditions in terms of initial iron concentration (maintaining a molar ratio 1:2 of Fe:EDDS), H 2 O 2 and pH. The system is evaluated in terms of degradation efficiency, H 2 O 2 consumption and iron availability. The simulated system has been compared in terms of degradation efficiency with a 60 L compound parabolic collector (CPC), and significant correlation has been observed. An approach for estimating near-optimal regions of operability is also demonstrated.

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“…Effect of inorganics species in natural water at different isoxazolyl penicillin concentrations Recent investigations have shown that inorganic species in natural waters have inhibition and enhancement effects during the degradation of organic pollutants by AOPs (Costa and Olivi, 2009;Frontistis et al, 2014;Guzman-Duque et al, 2011;Hazime et al, 2012;Lipczynska-Kochany and Kochany, 2008;Merouani et al, 2010;Torres et al, 2007). In order to evaluate the effect of inorganics species commonly found in natural waters, experiments were carried out using characterized (Table 1) natural mineral water (pH 6.2).…”

Section: Effect Of Organic Additivesmentioning

confidence: 99%

Selecting the best AOP for isoxazolyl penicillins degradation as a function of water characteristics: Effects of pH, chemical nature of additives and pollutant concentration

Villegas-Guzmán

Silva-Agredo

Flórez

et al. 2017

Journal of Environmental Management

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a b s t r a c tTo provide new insights toward the selection of the most suitable AOP for isoxazolyl penicillins elimination, the degradation of dicloxacillin, a isoxazolyl penicillin model, was studied using different advanced oxidation processes (AOPs): ultrasound (US), photo-Fenton (UV/H 2 O 2 /Fe 2þ ) and TiO 2 photocatalysis (UV/TiO 2 ). Although all processes achieved total removal of the antibiotic and antimicrobial activity, and increased the biodegradability level of the solutions, significant differences concerning the mineralization extend, the pH of the solution, the pollutant concentration and the chemical nature of additives were found. UV/TiO 2 reached almost complete mineralization; while~10% mineralization was obtained for UV/H 2 O 2 /Fe 2þ and practically zero for US. Effect of initial pH, mineral natural water and the presence of organic (glucose, 2-propanol and oxalic acid) were then investigated. UV/H 2 O 2 /Fe 2þ and US processes were improved in acidic media, while natural pH favored UV/TiO 2 system. According to both the nature of the added organic compound and the process, inhibition, no effect or enhancement of the degradation rate was observed. The degradation in natural mineral water showed contrasting results according to the antibiotic concentration: US process was enhanced at low concentration of dicloxacillin followed by detrimental effects at high substrate concentrations. A contrary effect was observed during photo-Fenton, while UV/TiO 2 was inhibited in all of cases. Finally, a schema illustrating the enhancement or inhibiting effects of water matrix is proposed as a tool for selecting the best process for isoxazolyl penicillins degradation.

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Effect of humic substances on the Fenton treatment of wastewater at acidic and neutral pH

Cited by 148 publications

References 30 publications

Evaluación del método Fenton para tratamientos de aguas industriales en ingeniería

Evaluación del método Fenton para tratamientos de aguas industriales en ingeniería

Microcontaminant degradation in municipal wastewater treatment plant secondary effluent by EDDS assisted photo-Fenton at near-neutral pH: An experimental design approach

Selecting the best AOP for isoxazolyl penicillins degradation as a function of water characteristics: Effects of pH, chemical nature of additives and pollutant concentration

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