Industrial wastewater treatment using a bubble photo-Fenton reactor with continuous gas supply

Sampaio, Emanuel F. S.; Rodrigues, Carmen S.D.; Lima, Vanessa N.; Madeira, Luís M.

doi:10.1007/s11356-020-10741-z

Cited by 6 publications

(10 citation statements)

References 41 publications

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“…On the other hand, in the range of 0.7–1.05 gFe 2+ /L at varying doses, a reduction of 30%, 60%, and 15% were observed in COD, SS, and color removal, respectively. Sampaio et al (2021) explained the reason for this decrease as a result of the undesirable scavenging reaction (Reaction ) between excess Fe 2+ and HO• radicals.

$$ {Fe}^{2+}+{OH}^{.

…”

Section: Findings and Discussionmentioning

confidence: 99%

“…By increasing of Fe 2+ dose from 0.15 g/L to 0.7 g/L, approximately a 30% increase in COD, SS, and color removal was observed. This result shows that an increase in Fe 2+ doses also increases HO• radical formation (Abedinzadeh et al, 2018;Ramos et al, 2019;Sampaio et al, 2021). On the other hand, in the range of 0.7-1.05 gFe 2+ /L at varying doses, a reduction of 30%, 60%, and 15% were observed in COD, SS, and color removal, respectively.…”

Section: Effect Of the Fe 2+ Dose On The Pfopmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The basic working principle of AOPs is based on the formation of hydroxyl radicals (HO•) with an oxidation potential of 2.80 V in the reactor where the process takes place. The HO•s formed can partially or completely mineralize most of the organic substances and dyestuffs (Sampaio et al, 2021). AOPs have been widely studied for a long time, and the Fenton and photo-Fenton oxidation processes (FOP and PFOP) stand out with their efficiency and results (Sözen et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Many parameters such as contact or reaction time, reactor volume, temperature pH, H 2 O 2 and Fe 2+ concentrations, UV intensity, flow rate, and effluent quality affect the performance of FOP and PFOP applied in the treatment of textile wastewater. This large number of parameters and complex reactions occurring in the reactor makes performance predictions difficult, causing waste of time and financial loss in process design and scaling (Kakavandi & Babaei, 2016;Sampaio et al, 2021;Talwar et al, 2019). This study introduces a unique comparison of the performance of FOP (H 2 O 2 /Fe 2+ ) and PFOP (UV/H 2 O 2 / Fe 2+ ) in removing chemical oxygen demand (COD), suspended solids (SS), and color from real textile wastewater due to its simple and fast reactions, environmentally friendly acceptance, and low cost.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

The comparison of Fenton and photo‐Fenton oxidation as a primary unit process for the treatment of raw textile wastewaters

Sarı

Türkeş

HakanGüney

et al. 2022

Water Environment Research

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The Fenton and photo‐Fenton oxidation processes (FOP and PFOP) are usually applied as a secondary unit process, and direct usage of both processes is critical in textile wastewater treatment. There is seldom study on the direct application of the FOP or PFOP showing the treatment of raw textile industry wastewaters. This study demonstrates the application and comparison of both FOP and PFOP as single units separately for the treatment of wastewater in a textile industry producing woven fabrics. In both processes, the highest treatment efficiency was achieved at pH 3. Chemical oxygen demand (COD), suspended solids (SS), and color parameters in FOP reduced from 1341 to 254 mg/L, 99.5 to 19.9 mg/L, and 1396 to 97.7 Pt‐Co, respectively. Separately, in the PFOP, 365‐nm wavelength UV radiation sources have been used. In PFOP, the same parameters were reduced from 715 to 42.9 mg/L, 90 to 9 mg/L, and 2080 to 83.2 Pt‐Co, respectively. These results were obtained at 0.7 g Fe2+/L and 2 mM H2O2 concentrations in both studies. PFOP can meet the textile industry receiving environment discharge standards of many countries, especially in Turkey. The use of PFOP as a single unit is possible in the treatment of textile industry wastewater without primary precipitation. The findings in this study may be practical for the adaptation of the processes on the field scale. Practitioner Points There is seldom study on the direct application of Fenton or photo‐Fenton processes as a single unit to raw textile wastewaters This study shows the application of the Fenton or photo‐Fenton processes as single units for the treatment of raw wastewater in a textile industry Results of both processes in this study meet the discharge standards of many countries Evaluations of efficiencies of both processes were achieved This study may be the focus of attention of treatment plant operators and researchers

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$$ {Fe}^{2+}+{OH}^{.

…”

Section: Findings and Discussionmentioning

confidence: 99%

Section: Effect Of the Fe 2+ Dose On The Pfopmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The comparison of Fenton and photo‐Fenton oxidation as a primary unit process for the treatment of raw textile wastewaters

Sarı

Türkeş

HakanGüney

et al. 2022

Water Environment Research

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The Utilization and Modeling of Photo‐Fenton Process as a Single Unit in Textile Wastewater Treatment

Sarı

Türkeş

Güney

et al. 2022

CLEAN Soil Air Water

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Studies on the direct application of the photo-Fenton process (PFOP) to disinfect and decontaminate textile wastewater are rare. The output of the artificial neural network (ANN) models applied to the wastewater of a textile factory producing woven fabrics, which is used to assess the efficiency of the PFOP process, are investigated and compared with each other in this study. The highest PFOP efficiency is obtained at a pH of 3. Chemical oxygen demand (COD), suspended solids (SS) and color removal rates are 94%, 90%, and 96%, respectively. The data are modeled with ANNs and nonlinear external input autoregressive ANNs (NARX-ANN) using the MATLAB R2020a software program. Both Levenberg-Marquardt (trainlm) and scaled conjugate gradient (trainscg) algorithms are employed in the ANN and NARX-ANN models, whereas hyperbolic tangent sigmoid (Tansig) and logistic sigmoid (Logsig) functions are superimposed on the hidden layer in the ANN model, and Tansig functions are superimposed on the NARX-ANN model. It is determined that the developed ANN models are more effective in estimating the PFOP efficiency. The mean squared error is 0.000 953, and the coefficient of determination (R 2 ) is 0.96 661.

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Bubble‐Assisted Sample Preparation Techniques for Mass Spectrometry

Elpa,

Urban

2024

Mass Spectrometry Reviews

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This review delves into the efficacy of utilizing bubbles to extract analytes into the gas phase, offering a faster and greener alternative to traditional sample preparation methods for mass spectrometry. Generating numerous bubbles in liquids rapidly transfers volatile and surface‐active species to the gas phase. Recently, effervescence has found application in chemical laboratories for swiftly extracting volatile organic compounds, facilitating instantaneous analysis. In the so‐called fizzy extraction, liquid matrices are pressurized with gas and then subjected to sudden decompression to induce effervescence. Alternatively, specifically designed effervescent tablets are introduced into the liquid samples. In situ bubble generation has also enhanced dispersion of extractant in microextraction techniques. Furthermore, droplets from bursting bubbles are collected to analyze non‐volatile species. Various methods exist to induce bubbling for sample preparation. The polydispersity of generated bubbles and the limited control of bubble size pose critical challenges in the stability of the bubble–liquid interface and the ability to quantify analytes using bubble‐based sample preparation techniques. This review covers different bubble‐assisted sample preparation methods and gives practical guidance on their implementation in mass spectrometry workflows. Traditional, offline, and online approaches for sample preparation relying on bubbles are discussed. Unconventional bubbling techniques for sample preparation are also covered.

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Industrial wastewater treatment using a bubble photo-Fenton reactor with continuous gas supply

Cited by 6 publications

References 41 publications

The comparison of Fenton and photo‐Fenton oxidation as a primary unit process for the treatment of raw textile wastewaters

The comparison of Fenton and photo‐Fenton oxidation as a primary unit process for the treatment of raw textile wastewaters

The Utilization and Modeling of Photo‐Fenton Process as a Single Unit in Textile Wastewater Treatment

Bubble‐Assisted Sample Preparation Techniques for Mass Spectrometry

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