Degradation of diclofenac by heterogeneous electro-Fenton process using magnetic single-walled carbon nanotubes as a catalyst

Sadeghi, Mahdi; Mehdinejad, Mohammad Hadi; Mengelīzadeh, Nezamaddin; Mahdavi, Yousef; Pourzamani, Hamidreza; Hajizadeh, Yaghoub; Zare, Mohammad Reza

doi:10.1016/j.jwpe.2019.100852

Cited by 41 publications

(9 citation statements)

References 59 publications

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“…On the opposite side, at pH values greater than the optimum (4.14), the decomposition of H2O2 into oxygen and water molecules, as well as a reduction in the oxidation potential of • OH, results in a decreased removal efficiency [20]. This agrees with previous studies on the EF oxidation of other kinds of wastewaters.…”

Section: H2o2 + H + → H3o2+ (7)supporting

confidence: 91%

Optimization of electro-Fenton oxidation of carbonated soft drink industry wastewater using response surface methodology

Davarnejad

Azizi

Joodaki

et al. 2020

Maced. J. Chem. Chem. Eng.

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The immense volume of highly polluted organic wastewater continuously generated in the beverage industry urges the design of new types of wastewater treatment plants. This study aimed to evaluate the applicability of the electro-Fenton (EF) technique to reduce organic pollution of real effluent from a carbonated soft drink factory. The impact of various process variables like pH, time, current density, H2O2/Fe2+ molar ratio, and the volume ratio of H2O2/soft drink wastewater (SDW) was analyzed using response surface methodology (RSM). The observed responses were in good agreement with predicted values obtained through optimization. The optimum conditions showed a chemical oxygen demand (COD) removal efficiency of 73.07 %, pH of 4.14, time of 41.55 min, current density of 46.12 mA/cm2, H2O2/Fe2+ molar ratio of 0.9802, and H2O2/SDW volume fraction of 2.74 ml/l. The EF process was able to effectively diminish the organic pollution, reduce the residence time and, therefore, the operating costs.

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Section: H2o2 + H + → H3o2+ (7)supporting

confidence: 91%

Optimization of electro-Fenton oxidation of carbonated soft drink industry wastewater using response surface methodology

Davarnejad

Azizi

Joodaki

et al. 2020

Maced. J. Chem. Chem. Eng.

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“…In addition, less H 2 O 2 accumulation was detected in the bulk solution as a result of rapid decomposition to hydroxyl radicals [79]. Similar enhancement was reported by Sadeghi et al [44] using Fe-MWCNTs as the heterogeneous catalyst.…”

Section: Nsaidssupporting

confidence: 82%

“…Diclofenac is a popular choice of model compound within the scientific community [39,43,44] and has been detected in surface water and groundwater at concentration levels ranging from 0.8 ng/L to 4.4 µg/L [74][75][76]. Its high solubility at neutral-alkaline conditions and low solubility at pH ≤ pKa (around 4.91) considerably hinder its removal by conventional treatments [77,78].…”

Section: Nsaidsmentioning

confidence: 99%

Heterogeneous Electro-Fenton as “Green” Technology for Pharmaceutical Removal: A Review

et al. 2021

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The presence of pharmaceutical products in the water cycle may cause harmful effects such as morphological, metabolic and sex alterations in aquatic organisms and the selection/development of organisms resistant to antimicrobial agents. The compounds’ stability and persistent character hinder their elimination by conventional physico-chemical and biological treatments and thus, the development of new water purification technologies has drawn great attention from academic and industrial researchers. Recently, the electro-Fenton process has been demonstrated to be a viable alternative for the removal of these hazardous, recalcitrant compounds. This process occurs under the action of a suitable catalyst, with the majority of current scientific research focused on heterogeneous systems. A significant area of research centres working on the development of an appropriate catalyst able to overcome the operating limitations associated with the homogeneous process is concerned with the short service life and difficulty in the separation/recovery of the catalyst from polluted water. This review highlights a present trend in the use of different materials as electro-Fenton catalysts for pharmaceutical compound removal from aquatic environments. The main challenges facing these technologies revolve around the enhancement of performance, stability for long-term use, life-cycle analysis considerations and cost-effectiveness. Although treatment efficiency has improved significantly, ongoing research efforts need to deliver economic viability at a larger scale due to the high operating costs, primarily related to energy consumption.

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“…[7][8][9] Hence, DCF has been widely detected in effluent of wastewater treatment plants (WWTPs), surface water, groundwater and even tap water due to its widespread use and low removal. [10][11][12] Furthermore, in the drinking water treatment process, the harmful disinfection byproducts (DBPs) produced by the reaction between disinfectants and DCF may pose a serious threat to human health. 13 Therefore, it is indispensable to develop efficient treatment methods for DCF removal in aquatic environment.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and reaction mechanism of photochemical degradation of diclofenac by UV-activated peroxymonosulfate

et al. 2021

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Degradation of diclofenac by heterogeneous electro-Fenton process using magnetic single-walled carbon nanotubes as a catalyst

Cited by 41 publications

References 59 publications

Optimization of electro-Fenton oxidation of carbonated soft drink industry wastewater using response surface methodology

Optimization of electro-Fenton oxidation of carbonated soft drink industry wastewater using response surface methodology

Heterogeneous Electro-Fenton as “Green” Technology for Pharmaceutical Removal: A Review

Kinetics and reaction mechanism of photochemical degradation of diclofenac by UV-activated peroxymonosulfate

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