Electrochemical oxidation of industrial wastewater with the tube type electrolysis module system

Jeong, Jongsik; Lee, Jaebok

doi:10.1016/j.seppur.2011.09.033

Cited by 19 publications

(4 citation statements)

References 31 publications

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“…Water-based organic pollutants such as methylene blue (MB), methylene orange (MO), and rhodamine B (RB) have been a big concern and serious challenge all over the world, so a variety of environmental remediation of these contaminants inclusive of biological degradation, electrolysis oxidation degradation, and photocatalytic degradation has been frequently employed. Due to their excellent advantages like complete mineralization of pollutants, no requirement for the disposal of sludge, and low energy consumption, several photocatalytic degradation techniques with dispersive nanostructured catalyst or substrate-supported nanostructured catalyst or catalyst-coated macroscale channel, or nanostructured catalyst-based microfluidic reactor have been put forward to carbonize relevant organic species in wastewater.…”

Section: Introductionmentioning

confidence: 99%

Regulation of the Volume Flow Rate of Aqueous Methyl Blue Solution and the Wettability of CuO/ZnO Nanorods to Improve the Photodegradation Performance of Related Microfluidic Reactors

Jing

Gao

et al. 2021

Langmuir

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Six CuO/ZnO nanorod (CuO/ZnONR)-based microfluidic reactors were constructed for different UV irradiation durations, with which an aqueous methylene blue (MB) solution was photodegraded at varied volume flow rate Q. Via numerical and experimental routes, the effects of the Q on the kinetic adsorption rate constant K a and the initial rate constant K A of the CuO/ZnONR-based microfluidic reactors were discussed. Moreover, a reverse contacting angle (CA) trend of CuO/ZnONRs to the reaction constant K curve of corresponding CuO/ZnONR-based microfluidic reactor suggested that the CA of CuO/ZnONRs was another key influencing factor that affected greatly the photodegradation performance of the microfluidic reactors. The Q of the aqueous MB solution and the UV irradiation duration for the photodeposition of CuO/ZnONRs were optimized to be 125 μL/min and 1.0 h, the K of the CuO/ZnONR-based microfluidic reactors reached 4.84 min–1, and the related ΔK A/K was less than 6%. Similarly, these methods and results can be employed not only to enhance the mass transport and adsorption of specific species within other nanostructured matrix material-coated microchannels but also to enlarge the actual contacting surface areas between these microchannels and the related solution, which further improve the performance of other nanostructured catalyst-based microfluidic reactors, rGO microfluidic voltage generation, and a GOx/AuNW enzymatic glucose microfluidic sensor.

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Section: Introductionmentioning

confidence: 99%

Regulation of the Volume Flow Rate of Aqueous Methyl Blue Solution and the Wettability of CuO/ZnO Nanorods to Improve the Photodegradation Performance of Related Microfluidic Reactors

Jing

Gao

et al. 2021

Langmuir

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“…Anodic oxidation as one of the advance oxidation processes also so-called "electrochemical incineration processes" [10] has widely been used to treat different kinds of organic matters in wastewaters. A few applications of which, that have had good results, are as follows: electrochemical treatment of organic matters and colloids in municipal wastewater [11], small organic molecules [12], organic polymers [13], pharmaceutical wastewater [14], landfill leachate [15], ethanol and methanol [16], petroleum refinery wastewater [17], herbicides [18], azo dyes [19], and non-biodegradable organic contaminants [20].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Electrochemical oxidation of activated sludge by using direct and indirect anodic oxidation

Rahmani

Godini

Nematollahi

et al. 2014

Desalination and Water Treatment

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A B S T R A C TThe electrochemical oxidation of activated sludge (EOAS) was studied by direct anodic oxidation on the surfaces of stainless steel and graphite electrodes as well as by indirect anodic oxidation on Pb/PbO 2 surface. The effects of several operating parameters such as current density, charge passed, initial pH, mixing speed, and configuration, and position of electrodes on the removal rate of chemical oxygen demand (COD), total and fecal coliform were investigated. The experimental data indicated that COD removal rates were, respectively, 66.9 and 77.5% in direct and indirect methods. The results also showed that the Pb/PbO 2 electrode through indirect electrooxidation mediated based on the electrogeneration of physisorbed hydroxyl radical and other oxidants like active chlorine has higher mineralization rates and consumes the least energy. Over 99% of total and fecal coliform was removed, which is mainly attributed to electrogeneration of hypochlorite and chloride ions in the aqueous solution. Kinetic trend of COD and total and fecal coliform removal for Pb/PbO 2 electrode were obtained. In order to better function of EOAS, selection of suitable mixing speed and configuration and position of electrodes are essential.

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“…This technology does not generate sludge but its energy consumption is about 1 or 2 orders of magnitude higher than the activated sludge processes. Recent references show a wide range of potential applications: landfill leachate, , dyes and textile industry effluents, − high salinity industrial wastewater, herbicides, aquaculture saline water, reverse osmosis concentrates, , and other organic toxic compounds. − Currently, a lot of interest is now focused in the decontamination of effluents polluted by hazardous substances, − keeping in mind that the final toxicity of the effluent after the treatment should be taken into account in order to avoid the creation of additional environmental problems . However, few references are focused on urban wastewater treatment by electrochemical oxidation technology and even less are available for the continuous operation at pilot scale. ,, Consequently, as the references are available about the removal of emerging pollutants, it is important to understand how an EO process can work under continuous operation such as in a UWWT plant, especially for low flow rate applications and water reclamation objectives, because EO processes allow a disinfection of the reclaimed water.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Modeling of the Continuous Electro-oxidation Process for Organic Matter Removal in Urban Wastewater Treatment

Domínguez-Ramos

Irabien

2013

Ind. Eng. Chem. Res.

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Electro-oxidation (EO) is one of the most promising forefront technologies to remove pollutants from wastewater. Most of the available references have shown interesting results for biorefractory compounds, especially at laboratory scale. However, the continuous operation of an EO process has not been studied in detail, even less at pilot scale. In this work, the EO technology has been applied to treat an effluent from an Urban Waste Water Treatment plant in a pilot scale with an anodic area of 0.35 m 2 (boron-doped diamond electrodes) taking into account the previous results obtained at lab scale (electrode area 7 × 10 −3 m 2 ). A model based on the mass balance, leads to the Damkoḧler number as the main parameter to describe the removal of organic matter expressed as chemical oxygen demand (COD) at lab and pilot scales. COD reduction is possible to manage by adjusting the flow rate to the anodic area ratio. The main difficulties for the process at pilot scale came from the formation of nonconductive films, which increases near two times the energy losses.

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Electrochemical oxidation of industrial wastewater with the tube type electrolysis module system

Cited by 19 publications

References 31 publications

Regulation of the Volume Flow Rate of Aqueous Methyl Blue Solution and the Wettability of CuO/ZnO Nanorods to Improve the Photodegradation Performance of Related Microfluidic Reactors

Regulation of the Volume Flow Rate of Aqueous Methyl Blue Solution and the Wettability of CuO/ZnO Nanorods to Improve the Photodegradation Performance of Related Microfluidic Reactors

Electrochemical oxidation of activated sludge by using direct and indirect anodic oxidation

Analysis and Modeling of the Continuous Electro-oxidation Process for Organic Matter Removal in Urban Wastewater Treatment

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