Electrocatalytic Degradation of Phenol by the Electrooxidation–Electrocoagulation Hybrid Process: Kinetics and Identification of Degradation Intermediates

Öztürk, Hazal; Barışçı, Sibel; Türkay, Özge; Veli, Sevil

doi:10.1061/(asce)ee.1943-7870.0001514

Cited by 9 publications

(6 citation statements)

References 33 publications

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“…Therefore, many make pH adjustments before processing either using ozonation or a combination of electrocoagulation with ozonation [12]. This is in line with research conducted by Öztürk et al [19] who performed phenol processing using a combination method of electrooxidation and electrocoagulation reported that the phenol removal efficiency was directly proportional to the increase in pH to pH 7 the removal efficiency decreased. Same as done by Muryanto et al [20], it was reported in the study that there was an increase in pH in tofu waste treated by electrocoagualation for 8 hours.…”

Section: Phsupporting

confidence: 61%

The Efficiency of Reducing COD and Turbidity of Tofu Wastewater using A Combination of Electrocoagulation and Ozone

Oktiawan

Samadikun

Ashari

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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We present an investigation of tofu wastewater that contains organic substances that can cause rapid microbial growth in the water. It can lead to a decrease in oxygen levels. In addition, tofu wastewater also contains suspended substances that cause turbidity. This study aims to evaluate changes in pH, temperature, and efficiency of reducing turbidity & chemical oxygen demand (COD) of tofu wastewater using a combination of electrocoagulation and ozone. This research method was carried out on a laboratory scale using tofu wastewater. The ozone generator is used for ozonising tofu wastewater and an acrylic batch type electrochemical reactor. The electrode material used for the anode and cathode is made of aluminum and iron sheets. There were also differences in the highest turbidity removal of 78.3% at the 60 th min when the wastewater was treated using a combination of electrocoagulation followed by ozone. The highest COD removal of 51.9% resulted from the treatment of tofu wastewater using ozone for 60 min. The initial temperature was 27.6°C then increased by 28.1°C (1.8%). Combination of electrocoagulation followed by ozone was more effective in reducing pollutants in tofu wastewater.

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Section: Phsupporting

confidence: 61%

The Efficiency of Reducing COD and Turbidity of Tofu Wastewater using A Combination of Electrocoagulation and Ozone

Oktiawan

Samadikun

Ashari

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…The banghman's pore diffusion model was also applied to the adsorption data of phenol and PNP. The equation for the pore diffusion model is given below [3] (11)…”

Section: Kinetics Studymentioning

confidence: 99%

“…A continuous release of phenols from petrochemical industries, coal conversion, and other phenol-releasing industries result in surface water and groundwater contamination [2]. Phenolic compounds are considered toxic hazards to the environment due to their low biodegradation rate and they get bioaccumulated in nature that has deleterious effects, and impacts on the environment [3]. Phenol imparts bad taste and odor to the water [4].…”

Section: Introductionmentioning

confidence: 99%

Adsorption and equilibrium studies of phenol and para-nitrophenol by magnetic activated carbon synthesised from cauliflower waste

Yadav

Maddheshiaya

Rawat

et al. 2019

Environmental Engineering Research

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In this study, waste cauliflower leaves were used for adsorbent preparation. The waste cauliflower leaves were converted into activated carbon by pyrolysis at two different temperatures 250˚C and 500˚C with magnetic property. The prepared adsorbents were denoted as CAC-250 and CAC-500 and characterized by the use of scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The adsorbents were applied for the removal of phenol and PNP from their aqueous solutions. The adsorption of phenol was found very less by the application CAC-250, whereas by the application of CAC-500 the adsorption of both phenol and PNP was enhanced. The maximum adsorption of phenol was found 99% and that of PNP was found ~100% using CAC-500, with initial adsorbate concentration 5 mg/L at 25˚C. The adsorption data was analysed with Langmuir, Freundlich and Temkin isotherm models and different kinetic models that are pseudo first order, pseudo second order, Elovich, intraparticle and pore diffusion model.

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“…Electrochemical treatment technologies have been used in industrial wastewater treatment processes and have recently gained attention for drinking water treatment based on their ability to provide efficient, safe, and effective removal of a variety of pollutants (Heffron et al, 2019;Maher et al, 2019a;Ö ztürk et al, 2019). Electrooxidation (EO) employs inert electrodes that indirectly oxidize contaminants through the generation of oxidants in solution and directly oxidize contaminants on the surface of the electrode (Chen, 2004;Heffron et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Electrocoagulation (EC) offers a well-documented approach to remove organic matter and would do well ahead of EO (Dubrawski and Mohseni, 2013). EC is the in situ generation of a metal oxide coagulant via the dissolution of sacrificial electrodes, either iron or aluminum, through the release of metal ions (Fe +2 , Fe +3 , and Al +3 ) (Linares-Hernández et al, 2010;Ö ztürk et al, 2019). Previous studies have found that iron EC is capable of efficiently removing dissolved organic carbon (DOC) (Dubrawski and Mohseni, 2013;Ulu et al, 2014), but EC is not an efficient treatment method for estrogenic compound removal (Maher et al, 2019b).…”

Section: Introductionmentioning

confidence: 99%

Removal of Estrogenic Compounds from Water Via Energy Efficient Sequential Electrocoagulation-Electrooxidation

Maher

O’Malley

Dollhopf

et al. 2020

Environmental Engineering Science

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The purpose of this study was to investigate energy reduction using electrocoagulation (EC) followed by electrooxidation (EO) targeting initial removal of dissolved organic carbon (DOC) during EC and subsequent removal of estrogenic compounds in EO. EC offers benefits over conventional coagulation such as in situ generation of coagulant but is not practical for removing estrogenic compounds. Advanced oxidation processes, including EO, can effectively remove micropollutants such as estrogenic compounds but are hindered by the presence of bulk organic matter. This study investigated four estrogenic compounds from the U.S. EPA's Contaminant Candidate List: estrone (E1), 17b-estradiol (E2), estriol (E3), and 17a-ethynylestradiol (EE2). First, EC (iron electrodes) was employed to remove humic acid and improve downstream removal of estrogenic compounds while reducing overall energy consumption in EO (boron-doped diamond electrodes). The sequential EC and EO system effectively reduced overall electrical energy per order (EEO) by more than half compared with EO alone for each estrogenic compound. The system also effectively removed humic acid and estrogenic compounds. An EC current density of 8.88 mA/cm 2 and electrolysis time of 8 min with a flocculation stir rate of 40 rpm (G = 23 s-1) achieved the greatest DOC and UV-VIS 254 removal. EO treatment achieved the highest estrogenic compound removal at a current density of 22.2 mA/cm 2. Initial humic acid sodium salt concentration (0-60 mg/L C) had an effect on EC iron dose and estrogenic compound removal. The EEO for EC-EO treatments was lower than EC alone, EO alone, UV photolysis, UV photocatalysis, and ozone but was higher than a photocatalytic reactor membrane and UV/H 2 O 2. Overall, the EC-EO system was effective at removing bulk organic matter during EC and estrogenic compounds during EO. EC-EO reduced overall energy demand, indicating that this system should be developed further as an advanced technology that could efficiently remove micropollutants.

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Electrocatalytic Degradation of Phenol by the Electrooxidation–Electrocoagulation Hybrid Process: Kinetics and Identification of Degradation Intermediates

Cited by 9 publications

References 33 publications

The Efficiency of Reducing COD and Turbidity of Tofu Wastewater using A Combination of Electrocoagulation and Ozone

The Efficiency of Reducing COD and Turbidity of Tofu Wastewater using A Combination of Electrocoagulation and Ozone

Adsorption and equilibrium studies of phenol and para-nitrophenol by magnetic activated carbon synthesised from cauliflower waste

Removal of Estrogenic Compounds from Water Via Energy Efficient Sequential Electrocoagulation-Electrooxidation

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