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Vinayagam V, Palani KN, Ganesh S, Rajesh S, Akula VV, Avoodaiappan R, Kushwaha OS, Pugazhendhi A. Recent developments on advanced oxidation processes for degradation of pollutants from wastewater with focus on antibiotics and organic dyes. ENVIRONMENTAL RESEARCH 2024; 240:117500. [PMID: 37914013 DOI: 10.1016/j.envres.2023.117500] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 10/13/2023] [Accepted: 10/23/2023] [Indexed: 11/03/2023]
Abstract
The existence of various pollutants in water environment contributes to global pollution and poses significant threats to humans, wildlife, and other living beings. The emergence of an effective, realistic, cost-effective, and environmentally acceptable technique to treat wastewater generated from different sectors is critical for reducing pollutant accumulation in the environment. The electrochemical advanced oxidation method is a productive technology for treating hazardous effluents because of its potential benefits such as lack of secondary pollutant and high oxidation efficiency. Recent researches on advanced oxidation processes (AOPs) in the period of 2018-2022 are highlighted in this paper. This review emphasizes on recent advances in electro-oxidation (EO), ozone oxidation, sonolysis, radiation, electro-Fenton (EF), photolysis and photocatalysis targeted at treating pharmaceuticals, dyes and pesticides polluted effluents. In the first half of the review, the concept of the AOPs are discussed briefly. Later, the influence of increasing current density, pH, electrode, electrolyte and initial concentration of effluents on degradation are discussed. Lastly, previously reported designs of electrochemical reactors, as well as data on intermediates generated and energy consumption during the electro oxidation and Fenton processes are discussed. According to the literature study, the electro-oxidation technique is more appropriate for organic compounds, whilst the electro-Fenton technique appear to be more appropriate for more complex molecules.
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Affiliation(s)
- Vignesh Vinayagam
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Chennai, Tamil Nadu, 602117, India
| | | | - Sudha Ganesh
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Chennai, Tamil Nadu, 602117, India
| | - Siddharth Rajesh
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Chennai, Tamil Nadu, 602117, India
| | - Vedha Varshini Akula
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Chennai, Tamil Nadu, 602117, India
| | - Ramapriyan Avoodaiappan
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Chennai, Tamil Nadu, 602117, India
| | - Omkar Singh Kushwaha
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, 600036, India
| | - Arivalagan Pugazhendhi
- School of Engineering, Lebanese American University, Byblos, Lebanon; Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, 603103, Tamil Nadu, India.
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2
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Mosur Nagarajan A, Subramanian A, Prasad Gobinathan K, Mohanakrishna G, Sivagami K. Electrochemical-based approaches for the treatment of pharmaceuticals and personal care products in wastewater. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 344:118385. [PMID: 37392690 DOI: 10.1016/j.jenvman.2023.118385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 05/15/2023] [Accepted: 06/11/2023] [Indexed: 07/03/2023]
Abstract
In recent times, emerging contaminants (ECs) like pharmaceuticals and personal care products (PPCPs) in water and wastewater have become a major concern in the environment. Electrochemical treatment technologies proved to be more efficient to degrade or remove PPCPs present in the wastewater. Electrochemical treatment technologies have been the subject of intense research for the past few years. Attention has been given to electro-oxidation and electro-coagulation by industries and researchers, indicating their potential to remediate PPCPs and mineralization of organic and inorganic contaminants present in wastewater. However, difficulties arise in the successful operation of scaled-up systems. Hence, researchers have identified the need to integrate electrochemical technology with other treatment technologies, particularly advanced oxidation processes (AOPs). Integration of technologies addresses the limitation of indiviual technologies. The major drawbacks like formation of undesired or toxic intermediates, s, energy expenses, and process efficacy influenced by the type of wastewater etc., can be reduced in the combined processes. The review discusses the integration of electrochemical technology with various AOPs, like photo-Fenton, ozonation, UV/H2O2, O3/UV/H2O2, etc., as an efficient way to generate powerful radicals and augment the degradation of organic and inorganic pollutants. The processes are targeted for PPCPs such as ibuprofen, paracetamol, polyparaben and carbamezapine. The discussion concerns itself with the various advantages/disadvantages, reaction mechanisms, factors involved, and cost estimation of the individual and integrated technologies. The synergistic effect of the integrated technology is discussed in detail and remarks concerning the prospects subject to the investigation are also stated.
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Affiliation(s)
- Aditya Mosur Nagarajan
- Industrial Ecology Research Group, School of Chemical Engineering, Vellore Institute of Technology, Vellore, India; Faculty of Process and Systems Engineering, Otto-von-Guericke-Universität, Magdeburg, Germany
| | - Aishwarya Subramanian
- Industrial Ecology Research Group, School of Chemical Engineering, Vellore Institute of Technology, Vellore, India; School of Process Engineering, Technische Universität Hamburg, Hamburg, Germany
| | - Krishna Prasad Gobinathan
- Industrial Ecology Research Group, School of Chemical Engineering, Vellore Institute of Technology, Vellore, India; School of Process Engineering, Technische Universität Hamburg, Hamburg, Germany
| | - Gunda Mohanakrishna
- Center for Energy and Environment (CEE), School of Advanced Sciences, KLE Technological University, Hubli, India.
| | - Krishnasamy Sivagami
- Industrial Ecology Research Group, School of Chemical Engineering, Vellore Institute of Technology, Vellore, India.
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3
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Cerro-Lopez M, Castro-Pastrana LI, Campos-Delgado J, Rubio-Rosas E, Bustos E, Martínez-Huitle CA. Mesostructured lead dioxide grown on titania nanotubes for diclofenac water removal through electrocatalytic and photoelectrocatalytic processes. ENVIRONMENTAL RESEARCH 2023; 231:116094. [PMID: 37201700 DOI: 10.1016/j.envres.2023.116094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 04/08/2023] [Accepted: 05/09/2023] [Indexed: 05/20/2023]
Abstract
Mesostructured PbO2/TiO2 materials were synthesized to perform electrocatalysis (as electrooxidation, EO) and photoelectrocatalysis for removing diclofenac (DCF), 15 ppm concentration in 0.1 M NaSO4 solutions, at different pH conditions (3.0, 6.0 and 9.0) by applying 30 mA cm-2. Titania nanotubes (TiO2NTs)-based materials were prepared to synthetize with a massive PbO2 deposit on this support to obtain TiO2NTs/PbO2 and a TiO2NTs:PbO2 material consisting in a dispersed PbO2 deposit on TiO2-NTs that allowed the formation of a heterostructured surface of combined composition (TiO2 and PbO2). Organics removal (DCF and byproducts) was monitored through UV-vis spectrophotometry and high-performance liquid chromatography (HPLC) during degradation tests. TiO2NTs/PbO2 electrode was tested in both processes, removing DCF at neutral and alkaline solution conditions in EO while an unimportant photoactivity was registered at this material. Conversely, TiO2NTs:PbO2 was used as electrocatalytic material in EO experiments, achieving more than 50% of DCF removal at pH 6.0 by applying 30 mA cm-2. Also, for first time, the synergic effect was investigated when it was exposed to UV irradiation in photoelectrocatalytic experiments, enhancing its efficacy (⁓more than 20%) to remove DCF from a solution with 15 ppm over performance removals achieved (56%) when EO was applied under similar conditions. Chemical Oxygen Demand (COD) analyses showed that significantly higher DCF degradation is reached under photoelectrocatalysis, since COD values decrease a 76% against a 42% decrease achieved with electrocatalysis. Scavenging experiments showed a significant participation on the pharmaceutical oxidation process through the generation of photoholes (h+), hydroxyl radicals and sulfate-based oxidants.
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Affiliation(s)
- Monica Cerro-Lopez
- Universidad de Las Américas-Puebla, Depto. Cs. Quimico Biológicas, Lab. de Electrocatálisis, Sta. Catarina Mártir S/N, Cholula, 72810, Puebla, Mexico.
| | - Lucila I Castro-Pastrana
- Universidad de Las Américas-Puebla, Depto. Cs. Quimico Biológicas, Lab. de Electrocatálisis, Sta. Catarina Mártir S/N, Cholula, 72810, Puebla, Mexico
| | - Jessica Campos-Delgado
- Benemérita Universidad Autónoma de Puebla, Instituto de Física, Av. San Claudio y Blvd. 18 Sur, Ciudad Universitaria, Col. San Manuel, 72570, Puebla, Puebla, Mexico
| | - Efrain Rubio-Rosas
- Benemérita Universidad Autónoma de Puebla, Centro Universitario de Vinculación y Transferencia de Tecnología, Prolongación 24 Sur, Esquina con Av. San Claudio, Ciudad Universitaria, Col. Sn. Manuel, 72540; Puebla, Puebla. Mexico
| | - Erika Bustos
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C. Parque Tecnológico Querétaro S/n, Sanfandila, 76703, Pedro Escobedo, Querétaro, Mexico
| | - Carlos A Martínez-Huitle
- Renewable Energies and Environmental Sustainability Research Group, Institute of Chemistry, Universidade Federal do Río Grande do Norte, Campus Universitário, Av. Salgado Filho 3000, Lagoa Nova, Natal, 59078-900, RN, Brazil
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4
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Sarfo DK, Kaur A, Marshall DL, O'Mullane AP. Electrochemical degradation and mineralisation of organic dyes in aqueous nitrate solutions. CHEMOSPHERE 2023; 316:137821. [PMID: 36640986 DOI: 10.1016/j.chemosphere.2023.137821] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
Electrochemical treatment of organic matter for environmental remediation necessitates the development of cheap and robust electrodes that are chemically and structurally stable. To address this challenging requirement, we demonstrate a new electrochemical approach using a simple copper electrode under cathodic conditions to electrochemically generate reactive nitrosonium ions for the degradation of different classes of synthetic organic dyes. This could be achieved in an aqueous HNO3/KNO3 electrolyte at a relatively low cathodic potential of -0.5 V RHE at room temperature. UV-visible absorption spectroscopy, Raman spectroscopy, liquid chromatography - mass spectrometry and total organic carbon measurements revealed the rapid decolorisation and mineralisation of several dye types such as triarylmethane dyes (crystal violet, cresol red), an azo dye (methyl orange) as well as a sulfur containing thiazine dye (toluidine blue). The total organic carbon content of a 50 mg L-1 methyl orange solution was found to decrease by 83% after 1 h of electrolysis. Promisingly, locally sourced river and creek water samples spiked with 50 mg L-1 methyl orange were also successfully treated for up to 6 cycles at a simple Cu electrode, demonstrating potential for the remediation of polluted waterways.
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Affiliation(s)
- Daniel K Sarfo
- School of Chemistry and Physics, Queensland University of Technology (QUT), Brisbane, QLD, 4001, Australia; Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD, 4001, Australia
| | - Arshdeep Kaur
- School of Chemistry and Physics, Queensland University of Technology (QUT), Brisbane, QLD, 4001, Australia; Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD, 4001, Australia
| | - David L Marshall
- Central Analytical Research Facility (CARF), Queensland University of Technology (QUT), Brisbane, QLD, 4001, Australia
| | - Anthony P O'Mullane
- School of Chemistry and Physics, Queensland University of Technology (QUT), Brisbane, QLD, 4001, Australia; Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD, 4001, Australia.
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5
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Aqueous biphasic systems composed of alcohol-based deep eutectic solvents and inorganic salts: Application in the extraction of dyes with varying hydrophobicity. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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6
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Abidi J, Clematis D, Samet Y, Delucchi M, Cademartori D, Panizza M. Influence of anode material and chlorides in the new-gen solid polymer electrolyte cell for electrochemical oxidation – Optimization of Chloroxylenol degradation with response surface methodology. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116584] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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7
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Chen S, He Z. Sonoelectrochemical activation of peroxymonosulfate: Influencing factors and mechanism of FA degradation, and application on landfill leachate treatment. CHEMOSPHERE 2022; 296:133365. [PMID: 34954193 DOI: 10.1016/j.chemosphere.2021.133365] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 12/16/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
In this work, sonoelectrochemically activated peroxymonosulfate (US-EC/PMS) was used to degrade fulvic acid (FA) in water. Compared with other technologies, the US-EC/PMS system can achieve higher FA decolorization in a short time. Moreover, the benefits of synergy are more prominent in the US-EC/PMS system. The effects of operating parameters on the sonoelectrochemical degradation of FA were investigated, including initial pH, initial FA concentration, current density, ultrasonic power, PMS dosage. The results showed the initial FA concentration and current density were critical to the degradation of FA. Under optimized parameters: initial pH of 2, 50 mg L-1 initial FA concentration, 30 mA cm-2 current density, 50 W ultrasonic power, 1 mM PMS dosage, the US-EC/PMS system can achieve 93% FA decolorization. The calculation results of current efficiency and energy consumption indicate that the introduction of PMS into the US-EC system has economic applicability. Scavenger experiments and electron paramagnetic resonance suggest that hydroxyl radicals, sulfate radicals, and singlet oxygen were the main ROS produced in the US-EC/PMS system. Accordingly, the possible mechanism of FA degradation by sonoelectrochemical activation PMS was proposed. Finally, the US-EC/PMS system was used to treat the aged landfill leachate. Three-dimensional fluorescence analysis showed that most of the humic substances (Hss) were effectively removed, and the biodegradability of the leachate was considerably improved. In addition, the effective removal of COD, chroma, and ammonia nitrogen were observed, proving that this technology is a powerful means to treat organic wastewater contaminated by Hss.
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Affiliation(s)
- Shuxun Chen
- School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, PR China
| | - Zhengguang He
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, 450001, PR China.
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8
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Chaparinia F, Cheshmeh Soltani RD, Safari M, Godini H, Khataee A. Treatment of aquatic medium containing common and emerging contaminants using an aero-electrochemical process based on graphite cathode and three metal oxides alloy as anode: Central composite design and photo/sono-enhancement. CHEMOSPHERE 2022; 297:134129. [PMID: 35231477 DOI: 10.1016/j.chemosphere.2022.134129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/19/2022] [Accepted: 02/24/2022] [Indexed: 06/14/2023]
Abstract
An aero-electrochemical advanced oxidation process (aero-EAOP) equipped with graphite cathode and dimensionally stable anodes was utilized for the treatment of aquatic media containing common and emerging contaminants. Among various anode materials, the application of Ti/RuO2/IrO2/SnO2 anode resulted in the highest effectiveness. Central composite experimental design (CCED) was used to attain the optimum operational parameters in terms of chlorine generation. Simultaneous decolorization and ammonium removal by the aero-EAOP process were investigated. Accordingly, the decolorization efficiency of 94%, along with the ammonium removal of 65.2%, was obtained within 30 min. Implementation of ultrasound and UV irradiation resulted in the complete decolorization within 25 and 20 min, respectively. In comparison, the influence of ultrasound and UV irradiation on the ammonium removal by the aero-EAOP reactor was not remarkable. Mineralization efficiency of 75.1% was obtained during the short reaction time of 30 min. With increasing hydraulic retention time (HRT) from 2 to 20 min, decolorization efficiency increased from 12.0 to 55.7% and ammonium removal efficiency increased from 16.6 to 37.8%, respectively. The complete degradation of amoxicillin (AMX) and tetracycline (TC) antibiotics were achieved within 25 and 30 min, respectively. The degradation efficiencies of ibuprofen (IBP), acetaminophen (APAP) and endocrine disrupting compound of bisphenol A (BPA) were obtained to be 58, 66 and 78% within 30 min, respectively. Photo-assisted aero-EAOP was more efficient than the aero-EAOP in degrading target emerging pollutants.
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Affiliation(s)
- Fatemeh Chaparinia
- Department of Environmental Health Engineering, School of Health, Arak University of Medical Sciences, Arak, Iran
| | | | - Mahdi Safari
- Department of Environmental Health Engineering, Faculty of Health, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Hatam Godini
- Department of Environmental Health Engineering, Faculty of Health, Alborz University of Medical Sciences, Karaj, Iran
| | - Alireza Khataee
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran; Department of Materials Science and Nanotechnology Engineering, Faculty of Engineering, Near East University, 99138, Nicosia, North Cyprous, Mersin 10, Turkey; Department of Material Science and Physical Chemistry of Materials, South Ural State University, 454080, Chelyabinsk, Russian Federation
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9
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Hassani A, Malhotra M, Karim AV, Krishnan S, Nidheesh PV. Recent progress on ultrasound-assisted electrochemical processes: A review on mechanism, reactor strategies, and applications for wastewater treatment. ENVIRONMENTAL RESEARCH 2022; 205:112463. [PMID: 34856168 DOI: 10.1016/j.envres.2021.112463] [Citation(s) in RCA: 51] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 11/18/2021] [Accepted: 11/27/2021] [Indexed: 05/26/2023]
Abstract
The electrochemical advanced oxidation processes (EAOPs) have received significant attention among the many other water and wastewater treatment technologies. However, achieving a desirable removal effect with a single technique is frequently difficult. Therefore, the integration of ultrasound technique with other processes such as electrocoagulation, electro-Fenton, and electrooxidation is a critical way to achieve effective organic pollutants decomposition from wastewater. This review paper is focused on ultrasound-assisted electrochemical (US/electrochemical) processes, so-called sonoelectrochemical processes of various organic pollutants. Emphasis was given to recently published articles for discussing the results and trends in this research area. The use of ultrasound and integration with electrochemical processes has a synergistic impact owing to the physical and chemical consequences of cavitation, resulting in enhancing the mineralization of organic pollutants. Various types of sonoelectrochemical reactors (batch and continuous) employed in the US/electrochemical processes were reviewed. In addition, the strategies to avoid passivation, enhanced generation of reactive oxygen species, and mixing effect are reviewed. Finally, concluding remarks and future perspectives on this research topic are also explored and recommended.
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Affiliation(s)
- Aydin Hassani
- Department of Materials Science and Nanotechnology Engineering, Faculty of Engineering, Near East University, 99138 Nicosia, TRNC, Mersin 10, Turkey.
| | - Milan Malhotra
- Environmental Science and Engineering Department, Indian Institute of Technology, Bombay, India
| | - Ansaf V Karim
- Environmental Science and Engineering Department, Indian Institute of Technology, Bombay, India
| | - Sukanya Krishnan
- Environmental Science and Engineering Department, Indian Institute of Technology, Bombay, India
| | - P V Nidheesh
- CSIR National Environmental Engineering Research Institute, Nagpur, Maharashtra, India.
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10
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Feng L, Liu J, Guo Z, Pan T, Wu J, Li X, Liu B, Zheng H. Reactive black 5 dyeing wastewater treatment by electrolysis-Ce (IV) electrochemical oxidation technology: Influencing factors, synergy and enhancement mechanisms. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Sridhar A, Ponnuchamy M, Kapoor A, Prabhakar S. Valorization of food waste as adsorbents for toxic dye removal from contaminated waters: A review. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127432. [PMID: 34688000 DOI: 10.1016/j.jhazmat.2021.127432] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 09/09/2021] [Accepted: 10/02/2021] [Indexed: 05/07/2023]
Abstract
Industrial contaminants such as dyes and intermediates are released into water bodies, making the water unfit for human use. At the same time large amounts of food wastes accumulate near the work places, residential complexes etc. polluting the air due to putrefaction. The need of the hour lies in finding innovative solutions for dye removal from wastewater streams. In this context, the article emphasizes adoption or conversion of food waste materials, an ecological nuisance, as adsorbents for the removal of dyes from wastewaters. Adsorption, being a well-established technique, the review critically examines the specific potential of food waste constituents as dye adsorbents. The efficacy of food waste-based adsorbents is examined, besides addressing the possible adsorption mechanisms and the factors affecting phenomenon such as pH, temperature, contact time, adsorbent dosage, particle size, and ionic strength. Integration of information and communication technology approaches with adsorption isotherms and kinetic models are emphasized to bring out their role in improving overall modeling performance. Additionally, the reusability of adsorbents has been highlighted for effective substrate utilization. The review makes an attempt to stress the valorization of food waste materials to remove dyes from contaminated waters thereby ensuring long-term sustainability.
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Affiliation(s)
- Adithya Sridhar
- School of Food Science and Nutrition, Faculty of Environment, The University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Muthamilselvi Ponnuchamy
- Department of Chemical Engineering, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603 203, India
| | - Ashish Kapoor
- Department of Chemical Engineering, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603 203, India.
| | - Sivaraman Prabhakar
- Department of Chemical Engineering, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603 203, India
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12
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Patidar R, Srivastava VC. Ultrasound-assisted electrochemical treatment of cosmetic industry wastewater: Mechanistic and detoxification analysis. JOURNAL OF HAZARDOUS MATERIALS 2022; 422:126842. [PMID: 34416687 DOI: 10.1016/j.jhazmat.2021.126842] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 08/04/2021] [Accepted: 08/04/2021] [Indexed: 06/13/2023]
Abstract
This study aims to investigate the mineralization of cosmetics producing industrial wastewater (CW) using sono-electrochemical (US-EC) treatments. The influence of operating parameters such as current density (j), electrolyte (Na2SO4) concentration (m), initial pH (pHo), and ultrasonic power was investigated using Ti/RuO2 dimensionally stable electrodes. The results demonstrated 80.9% chemical oxygen demand (COD) removal efficiency, 433.5 kWh (kg COD removed)-1 of specific energy consumption at the optimum conditions of P = 100 W, j = 213 A m-2, pHo= 7.6 (natural pH), and m = 1.5 g L-1. With the application of ultrasound, COD removal efficiency increases from 60.2% to 80.9%, with a synergistic effect of 1.1. Kinetics study analysis confirms that mineralization follows the nth order kinetics model. In the presence of ultrasound, the performance of electrochemical treatment gets enhanced due to higher electron transfer, the enhanced production of •OH radicals, and sulfate radicals (SO4•-). The pathway for the degradation of the compound was suggested by quadrupole time of flight mass spectroscopy (QToF-MS). The operating cost of the process was also evaluated to establish the applicability of the US-EC process at the industrial scale.
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Affiliation(s)
- Ritesh Patidar
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Vimal Chandra Srivastava
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
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13
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Sun W, Liu D, Zhang M. Application of electrode materials and catalysts in electrocatalytic treatment of dye wastewater. Front Chem Sci Eng 2021. [DOI: 10.1007/s11705-021-2108-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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14
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Titchou FE, Zazou H, Afanga H, El Gaayda J, Ait Akbour R, Lesage G, Rivallin M, Cretin M, Hamdani M. Electrochemical oxidation treatment of Direct Red 23 aqueous solutions: Influence of the operating conditions. SEP SCI TECHNOL 2021. [DOI: 10.1080/01496395.2021.1982978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Fatima Ezzahra Titchou
- Faculty of Sciences, Chemical Department, Ibn Zohr University, Dakhla District, Agadir, Morocco
| | - Hicham Zazou
- Faculty of Sciences, Chemical Department, Ibn Zohr University, Dakhla District, Agadir, Morocco
| | - Hanane Afanga
- Faculty of Sciences, Chemical Department, Ibn Zohr University, Dakhla District, Agadir, Morocco
| | - Jamila El Gaayda
- Faculty of Sciences, Chemical Department, Ibn Zohr University, Dakhla District, Agadir, Morocco
| | - Rachid Ait Akbour
- Faculty of Sciences, Chemical Department, Ibn Zohr University, Dakhla District, Agadir, Morocco
| | - Geoffroy Lesage
- Institut Européen des Membranes, Iem, Univ Montpellier, Cnrs, Enscm, Montpellier, France
| | - Matthieu Rivallin
- Institut Européen des Membranes, Iem, Univ Montpellier, Cnrs, Enscm, Montpellier, France
| | - Marc Cretin
- Institut Européen des Membranes, Iem, Univ Montpellier, Cnrs, Enscm, Montpellier, France
| | - Mohamed Hamdani
- Faculty of Sciences, Chemical Department, Ibn Zohr University, Dakhla District, Agadir, Morocco
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Saleh M, Yildirim R, Isik Z, Karagunduz A, Keskinler B, Dizge N. Optimization of the electrochemical oxidation of textile wastewater by graphite electrodes by response surface methodology and artificial neural network. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 84:1245-1256. [PMID: 34534120 DOI: 10.2166/wst.2021.240] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In this study, electrochemical oxidation of combed fabric dyeing wastewater was investigated using graphite electrodes. The response surface methodology (RSM) was used to design the experiments via the central composite design (CCD). The planned experiments were done to track color changes and chemical oxygen demand (COD) removal. The experimental results were used to develop optimization models using RSM and the artificial neural network (ANN) and they were compared. The developed models by the two methods were in good agreement with the experimental results. The optimum conditions were found at 150 A/m2, pH 5, and 120 min. The removal efficiencies for color and COD reached 96.6% and 77.69%, respectively. The operating cost at the optimum conditions was also estimated. The energy and the cost of 1 m3 of wastewater required 34.9 kWh and 2.58 US$, respectively. The graphite electrodes can be successfully utilized for treatment of combed fabric dyeing wastewater with reasonable cost.
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Affiliation(s)
- Mohammed Saleh
- Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey E-mail:
| | - Rabia Yildirim
- Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey E-mail:
| | - Zelal Isik
- Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey E-mail:
| | - Ahmet Karagunduz
- Department of Environmental Engineering, Gebze Technical University, Kocaeli, 41400, Turkey
| | - Bulent Keskinler
- Department of Environmental Engineering, Gebze Technical University, Kocaeli, 41400, Turkey
| | - Nadir Dizge
- Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey E-mail:
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Zhang F, Wang W, Xu L, Zhou C, Sun Y, Niu J. Treatment of Ni-EDTA containing wastewater by electrochemical degradation using Ti 3+ self-doped TiO 2 nanotube arrays anode. CHEMOSPHERE 2021; 278:130465. [PMID: 34126689 DOI: 10.1016/j.chemosphere.2021.130465] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 03/27/2021] [Accepted: 03/31/2021] [Indexed: 06/12/2023]
Abstract
Ethylene diamine tetraacetic acid (EDTA) could form stable complexes with nickel due to its strong chelation. Ni-EDTA has significant impacts on human health because of its acute toxicity and low biodegradability, thus some appropriate approaches are required for its removal. In this research, a Ti3+ self-doped TiO2 nanotube arrays electrode (ECR-TiO2 NTA) was prepared and employed in electrochemical degradation of Ni-EDTA. The oxygen evolution potential of ECR-TiO2 NTA was 2.6 V vs. SCE. More than 96% Ni-EDTA and 88% TOC was removed after reaction for 120 min at current density 2 mA cm-2 at pH 4.34. The degradation of Ni-EDTA was mainly through the cleavage of amine group within Ni-EDTA and furthermore decomposed it into small molecular acids and inorganic ions including NH4+and NO3-. The electro-deposition of nickel ions at cathode was confirmed by XPS and was greatly affected by the pH of solution. The effects of current density, initial Ni-EDTA concentration, initial pH of solution and HCO3- concentration on Ni-EDTA degradation were investigated. The results exhibited that the ECR-TiO2 NTA had excellent efficiencies in electrochemical degradation of Ni-EDTA. The LSV analysis suggested that Ni-EDTA oxidation on ECR-TiO2 NTA anode and the production of hydroxyl radical (·OH) on the anode played an important role in the removal of Ni-EDTA.
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Affiliation(s)
- Fan Zhang
- Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Weilai Wang
- Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Lei Xu
- Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Chengzhi Zhou
- Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Yanglong Sun
- Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Junfeng Niu
- Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China.
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17
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Rahmani A, Seid-Mohammadi A, Leili M, Shabanloo A, Ansari A, Alizadeh S, Nematollahi D. Electrocatalytic degradation of diuron herbicide using three-dimensional carbon felt/β-PbO 2 anode as a highly porous electrode: Influencing factors and degradation mechanisms. CHEMOSPHERE 2021; 276:130141. [PMID: 33714150 DOI: 10.1016/j.chemosphere.2021.130141] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/20/2021] [Accepted: 02/25/2021] [Indexed: 06/12/2023]
Abstract
Traditional planar PbO2 anodes have been used extensively for the electrocatalytic degradation process. However, by using porous PbO2 anodes that have a three-dimensional architecture, the efficiency of the process can be significantly upgraded. In the current study, carbon felt (CF) with a highly porous structure and a conventional planar graphite sheet (G) were used as electrode substrate for PbO2 anodes. Both CF/β-PbO2 and G/β-PbO2 anodes were prepared by the anodic deposition method. The main properties of the electrodes were characterized by XRD, EDX-mapping, FESEM, and BET-BJH techniques. The electrocatalytic degradation of diuron using three-dimensional porous CF/β-PbO2 anode was modeled and optimized by a rotatable central composite design. After optimizing the process, the ability of porous CF/β-PbO2 and planar G/β-PbO2 anodes to degrade and mineralize diuron was compared. The electrocatalytic degradation of the diuron was well described by a quadratic model (R2 > 0.99). Under optimal conditions, the kinetics of diuron removal using CF/β-PbO2 anode was 3 times faster than the G/β-PbO2 anode. The energy consumed for the complete mineralization of diuron using CF/β-PbO2 anode was 2077 kWh kg-1 TOC. However, the G/β-PbO2 anode removed only 65% of the TOC by consuming 54% more energy. The CF/β-PbO2 had more stability (115 vs. 91 h), larger surface area (1.6287 vs. 0.8565 m2 g-1), and higher oxygen evolution potential (1.89 vs. 1.84 V) compared to the G/β-PbO2. In the proposed pathways for diuron degradation, the aromatic ring and groups of carbonyl, dimethyl urea, and amide were the main targets for HO• radical attacks.
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Affiliation(s)
- Alireza Rahmani
- Department of Environmental Health Engineering, Faculty of Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Abdolmotaleb Seid-Mohammadi
- Department of Environmental Health Engineering, Faculty of Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mostafa Leili
- Department of Environmental Health Engineering, Faculty of Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Amir Shabanloo
- Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, Iran.
| | - Amin Ansari
- Faculty of Chemistry, Bu-Ali-Sina University, Hamadan, Iran
| | - Saber Alizadeh
- Faculty of Chemistry, Bu-Ali-Sina University, Hamadan, Iran
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18
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Radical scavenger competition of alizarin and curcumin: a mechanistic DFT study on antioxidant activity. J Mol Model 2021; 27:166. [PMID: 33987710 PMCID: PMC8119285 DOI: 10.1007/s00894-021-04778-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 04/25/2021] [Indexed: 12/11/2022]
Abstract
In vivo hydroxyl, peroxyl, and superoxide free radicals caused by oxidative stress can be toxic to molecules that are essential for the human body. However, there are natural compounds that can decrease the amount of these harmful species. In this work, we are focusing on two well-known compounds, alizarin (red) and curcumin, to study their interactions with these small radicals for a comparison between a rigid and a flexible structure. We made a mechanistic study and found the major and minor degradation products of curcumin as well as the autoxidation products of it based on a wide range of literature. We found several more favored pathways than those that were previously proposed. On the contrary, for degradation/oxidation of alizarin, only a few proposed mechanisms can be found which were performed in specific conditions. Our calculations predicted some favored rearrangements for the alizarin by peroxyl and superoxide radicals. Interaction of alizarin red and bright yellow curcumin with small radicals like hydroxyl, peroxyl, and superoxide radicals, such as the reaction between curcumin radicals and oxygen molecule, results in different species like epoxides or another kind of radical forms. The stability of epoxides is different in the case of rigid and flexible structures. ![]()
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Chen S, He P, Zhou P, Wang X, Xiao F, He Q, Li J, Jia L, Zhang H, Jia B, Tang B. Development of a novel graphitic carbon nitride and multiwall carbon nanotube co-doped Ti/PbO 2 anode for electrocatalytic degradation of acetaminophen. CHEMOSPHERE 2021; 271:129830. [PMID: 33556630 DOI: 10.1016/j.chemosphere.2021.129830] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/25/2021] [Accepted: 01/29/2021] [Indexed: 06/12/2023]
Abstract
In this work, we have constructed a novel graphitic carbon nitride/multiwall carbon nanotube (GCN/CNT) doped Ti/PbO2 as anode for highly effective degradation of acetaminophen (ACE) wastewater. The ACE removal efficiency of 83.2% and chemical oxygen demand removal efficiency of 76.3% are achieved under the optimal condition of temperature 25 °C, initial pH 7, current density 15 mA cm-2 and Na2SO4 concentration 6.0 g L-1. The excellent electrocatalytic activity of Ti/PbO2-GCN-CNT anode for ACE oxidation is ascribed to the effective suppression of oxygen evolution and the enhanced electron transfer after introducing GCN and CNT. Furthermore, Ti/PbO2-GCN-CNT electrode displays excellent stability and reusability. ACE degradation is accomplished by direct oxidation and indirect oxidation, and ∙OH radical plays primary role in the indirect oxidation of ACE wastewater. The intermediates of ACE degradation are detailly investigated using LC-MS analysis and a possible degradation mechanism is proposed.
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Affiliation(s)
- Shouxian Chen
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Ping He
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China; International Science and Technology Cooperation Laboratory of Micro-nanoparticle Application Research, Southwest University of Science and Technology, Mianyang, 621010, PR China.
| | - Pengcheng Zhou
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Xuejiao Wang
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Feng Xiao
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Qihang He
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Jing Li
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Lingpu Jia
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Hui Zhang
- International Science and Technology Cooperation Laboratory of Micro-nanoparticle Application Research, Southwest University of Science and Technology, Mianyang, 621010, PR China; Department of Chemical and Biochemical Engineering, Western University, London, Ontario N6A 5B9, Canada
| | - Bin Jia
- International Science and Technology Cooperation Laboratory of Micro-nanoparticle Application Research, Southwest University of Science and Technology, Mianyang, 621010, PR China; Key Laboratory of Shock and Vibration of Engineering Materials and Structures of Sichuan Province, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Bin Tang
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, PR China.
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20
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Chen Z, Lai W, Xu Y, Xie G, Hou W, Zhanchang P, Kuang C, Li Y. Anodic oxidation of ciprofloxacin using different graphite felt anodes: Kinetics and degradation pathways. JOURNAL OF HAZARDOUS MATERIALS 2021; 405:124262. [PMID: 33213981 DOI: 10.1016/j.jhazmat.2020.124262] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/26/2020] [Accepted: 10/09/2020] [Indexed: 06/11/2023]
Abstract
Ciprofloxacin (CIP) is ubiquitous in the environment which poses a certain threat to human and ecology. In this investigation, the physical and electrochemical properties of graphite felt (GF) anodes which affected the anodic oxidation (AO) performance, and the CIP removal effect of GF were evaluated. The GFs were used as anodes for detection of ·OH with coumarin (COU) as molecule probe and removal of CIP in a 150 mL electrolytic cell with Pt cathode (AO-GF/Pt system). The results showed that hydrophilic GF (B-GF) owned higher sp3/sp2 and more oxygen-containing and nitrogen-containing functional groups than the hydrophobic GF (A-GF). Moreover, B-GF possessed higher oxygen evolution potential (1.12 V), more active sites and stronger ·OH generation capacity. Above mentioned caused that B-GF exhibited more superior properties for CIP removal. The best efficiencies (96.95%, 99.83%) were obtained in the AO-B-GF/Pt system at 6.25 mAcm-2 after 10 min (k1, 0.356 min-1) and 60 min (k2, 0.224 min-1), respectively. Furthermore, nine degradation pathways of CIP in AO-B-GF/Pt system were summarized as the cleavage of the piperazine ring, cyclopropyl group, quinolone ring and F atom by ·OH. It provides new insights into the removal and degradation pathways of CIP with GF in AO system.
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Affiliation(s)
- Zhuoyao Chen
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Weikang Lai
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Yanbin Xu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - Guangyan Xie
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Waner Hou
- Analysis and Test Center, Guangdong University of Technology, Guangzhou 510006, China
| | - Pan Zhanchang
- School of Chemical Engineering & Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Chaozhi Kuang
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Yuxin Li
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
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21
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Rao Y, Zhang Y, Li A, Zhang T, Jiao T. Photocatalytic activity of G-TiO 2@Fe 3O 4 with persulfate for degradation of alizarin red S under visible light. CHEMOSPHERE 2021; 266:129236. [PMID: 33310365 DOI: 10.1016/j.chemosphere.2020.129236] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 11/30/2020] [Accepted: 12/04/2020] [Indexed: 06/12/2023]
Abstract
A composite photocatalyst combined with TiO2, graphite (G) and Fe3O4 was prepared by co-precipitation method. Then the G-TiO2@Fe3O4 was employed with persulfate (PS) to degrade alizarin red S (ARS) under visible light. The removal rate of ARS reached 100% after 60 min irradiation. The degradation rate constant of G-TiO2@Fe3O4/PS exhibited 20.8, 9.0 and 3.1 times than that of TiO2, G-TiO2 and G-TiO2@Fe3O4, respectively. The effects of photocatalyst dosage, mass ratios of graphite and Fe3O4 to TiO2, PS dosage, initial pH and ARS concentration on the degradation efficiency were investigated. The optimal removal efficiency of ARS was obtained when G-TiO2@Fe3O4 dosage was 0.25 g/L, G: TiO2 = 0.005, Fe3O4: TiO2 = 0.8, PS concentration was 6 mmol/L, initial pH = 3, and initial concentration of ARS was 100 mg/L. The SO4·- was demonstrated more important than O2- and·OH in the degradation of ARS. The intermediates and possible degradation pathways of ARS were discussed. Reuse and stability of G-TiO2@Fe3O4 were also tested, and 88.3% photocatalytic activity was maintained after five cycles. Therefore, the proposed G-TiO2@Fe3O4/PS not only had excellent photocatalytic activity, but also showed superior stability and reusability.
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Affiliation(s)
- Yandi Rao
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China; Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, 066004, China
| | - Yuxin Zhang
- Heibei Province Low-carbon and Clean Building Heating Technology Innovation Center, Hebei Key Laboratory of Green Construction and Intelligent Maintenance for Civil Engineering, School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao, 066006, China
| | - Aoqi Li
- Heibei Province Low-carbon and Clean Building Heating Technology Innovation Center, Hebei Key Laboratory of Green Construction and Intelligent Maintenance for Civil Engineering, School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao, 066006, China
| | - Tianhu Zhang
- Heibei Province Low-carbon and Clean Building Heating Technology Innovation Center, Hebei Key Laboratory of Green Construction and Intelligent Maintenance for Civil Engineering, School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao, 066006, China.
| | - Tifeng Jiao
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China; Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, 066004, China.
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22
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Adsorption of Malachite Green and Alizarin Red S Dyes Using Fe-BTC Metal Organic Framework as Adsorbent. Int J Mol Sci 2021; 22:ijms22020788. [PMID: 33466760 PMCID: PMC7830139 DOI: 10.3390/ijms22020788] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/08/2021] [Accepted: 01/10/2021] [Indexed: 12/02/2022] Open
Abstract
Synthetic organic dyes are widely used in various industrial sectors but are also among the most harmful water pollutants. In the last decade, significant efforts have been made to develop improved materials for the removal of dyes from water, in particular, on nanostructured adsorbent materials. Metal organic frameworks (MOFs) are an attractive class of hybrid nanostructured materials with an extremely wide range of applications including adsorption. In the present work, an iron-based Fe-BTC MOF, prepared according to a rapid, aqueous-based procedure, was used as an adsorbent for the removal of alizarin red S (ARS) and malachite green (MG) dyes from water. The synthesized material was characterized in detail, while the adsorption of the dyes was monitored by UV-Vis spectroscopy. An optimal adsorption pH of 4, likely due to the establishment of favorable interactions between dyes and Fe-BTC, was found. At this pH and at a temperature of 298 K, adsorption equilibrium was reached in less than 30 min following a pseudo-second order kinetics, with k″ of 4.29 × 10−3 and 3.98 × 10−2 g∙mg−1 min−1 for ARS and MG, respectively. The adsorption isotherm followed the Langmuir model with maximal adsorption capacities of 80 mg∙g−1 (ARS) and 177 mg∙g−1 (MG), and KL of 9.30·103 L∙mg−1 (ARS) and 51.56·103 L∙mg−1 (MG).
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Guo H, Xu Z, Qiao D, Wang L, Xu H, Yan W. Fabrication and characterization of titanium-based lead dioxide electrode by electrochemical deposition with Ti 4 O 7 particles. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2021; 93:42-50. [PMID: 32304604 DOI: 10.1002/wer.1339] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 04/03/2020] [Accepted: 04/07/2020] [Indexed: 06/11/2023]
Abstract
A novelly modified Ti/PbO2 electrode was synthesized with Ti4 O7 particles through electrochemical deposition method (marked as PbO2 -Ti4 O7 ). The properties of the as-prepared electrodes were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), hydroxyl radical concentration, accelerated life test, etc. Azophloxine was chosen as the model pollutant for electro-catalytic oxidation to evaluate electrochemical activity of the electrode. The experimental results indicated that Ti4 O7 modification could prominently improve the properties of the electrodes, especially, improve the surface morphology, enhance the current response, and reduce the impedance. However, the predominant phases of PbO2 electrodes were unchanged, which were completely pure β-PbO2 . During the electrochemical oxidation process, the PbO2 -Ti4 O7 (1.0) electrode showed the best performance on degradation of AR1 (i.e., the highest removal efficiency and the lowest energy consumption), which could be attributed to its high oxygen evolution potential (OEP) and strong capability of HO· generation. Moreover, the accelerated service lifetime of PbO2 -Ti4 O7 (1.0) electrode was 175 hr, 1.65 times longer than that of PbO2 electrode (105.5 hr). PRACTITIONER POINTS: PbO2 /Ti4 O7 composite anode was fabricated through electrochemical co-deposition. Four concentration gradients of Ti4 O7 particle were tested. PbO2 -Ti4 O7 (1.0) showed optimal electrocatalytic ability due to its high OEP and HO· productivity.
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Affiliation(s)
- Hua Guo
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Zhicheng Xu
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Dan Qiao
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Liangtian Wang
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Hao Xu
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Wei Yan
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China
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Wang L, Wang J, Pan H, Zhao M, Chen J. Kinetics and removal pathwayof basic fuchsin by electrochemical oxidization. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2020.114792] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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25
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Martín de Vidales MJ, Rua J, Montero de Juan JL, Fernández-Martínez F, Dos santos-García AJ. Degradation of Contaminants of Emerging Concern by Electrochemical Oxidation: Coupling of Ultraviolet and Ultrasound Radiations. MATERIALS 2020; 13:ma13235551. [PMID: 33291437 PMCID: PMC7730255 DOI: 10.3390/ma13235551] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 11/29/2020] [Accepted: 12/02/2020] [Indexed: 11/24/2022]
Abstract
In this work, we study the electrochemical oxidation of methyl red, a dye present in textile industrial effluents, which is selected as the model for the degradation of Contaminants of Emerging Concern. The influence of the initial pollutant concentration (1–5 mg dm−3), applied current density (2–15 mA cm−2), and the coupling of ultraviolet or ultrasound radiation have been studied using a titanium plate as anode. The results show that electrochemical oxidation is able to efficiently remove methyl red, and the process efficiency decreases with the initial pollutant concentration. At high applied current densities, efficiency drastically decreases due to a less effective mass transfer of the pollutant on the anodic surface. On one hand, the coupling of ultrasound entails an antagonistic effect on the process efficiency, which is probably due to a massive formation of oxidant radicals followed by a fast recombination process. On the other hand, the coupling of ultraviolet radiation increases the process efficiency. Concomitantly to the oxidation processes, titanium electrode produces rising TiO2–anatase nanoparticles, boosting the mineralization process. This new finding sets up a significant improvement over conventional photocatalysis treatments using TiO2–anatase as a catalyst due to synergistic effects coming from the coupling of the electrochemical oxidation and photocatalysis process with Ti anode.
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26
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Teng J, You S, Ma F, Chen X, Ren N. Enhanced electrochemical decontamination and water permeation of titanium suboxide reactive electrochemical membrane based on sonoelectrochemistry. ULTRASONICS SONOCHEMISTRY 2020; 69:105248. [PMID: 32652485 DOI: 10.1016/j.ultsonch.2020.105248] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 06/28/2020] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
Reactive electrochemical membrane (REM) allows electrochemical oxidation (EO) water purification under flow-through operation, which improves mass transfer on the anode surface significantly. However, O2 evolution reaction (OER) may cause oxygen bubbles to be trapped in small-sized confined flow channels, and thus degrade long-term filterability and treatability of REM. In this study, ultrasound (ultrasonic vibrator, 28 kHz, 180 W) was applied to EO system (i. e. sonoelectrochemistry) containing titanium suboxide-REM (TiSO-REM) anode for enhanced oxidation of 4-chlorophenol (4-CP) target pollutant. Both experimental and modeling results demonstrated that ultrasound could mitigate the retention of O2 bubbles in the porous structures by destructing large-size bubbles, thus not only increasing permeate flux but also promoting local mass transfer. Meanwhile, oxidation rate of 4-CP for EO with ultrasound (EO-US, 0.0932 min-1) was 216% higher than that for EO without ultrasound (0.0258 min-1), due to enhanced mass transfer and OH production under the cavitation effect of ultrasound. Density functional theory (DFT) calculations confirmed the most efficient pathway of 4-CP removal to be direct electron transfer of 4-CP to form [4-CP]+, followed by subsequent oxidation mediated by OH produced from anodic water oxidation on TiSO-REM anode. Last, the stability of TiSO-REM could be improved considerably by application of ultrasound, due to alleviation of electrode deactivation and fouling, indicated by cyclic test, scan electron microscopy (SEM) observation and Fourier transform infrared spectroscopy (FT-IR) characterization. This study provides a proof-of-concept demonstration of ultrasound for enhanced EO of recalcitrant organic pollutants by REM anode, making decentralized wastewater treatment more efficient and more reliable.
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Affiliation(s)
- Jie Teng
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Shijie You
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Fang Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xiaodong Chen
- Innovative Centre for Flexible Devices (iFLEX), School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Nanqi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
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Chen S, Zhou L, Yang T, He Q, Zhou P, He P, Dong F, Zhang H, Jia B. Thermal decomposition based fabrication of dimensionally stable Ti/SnO 2-RuO 2 anode for highly efficient electrocatalytic degradation of alizarin cyanin green. CHEMOSPHERE 2020; 261:128201. [PMID: 33113663 DOI: 10.1016/j.chemosphere.2020.128201] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 08/26/2020] [Accepted: 08/27/2020] [Indexed: 06/11/2023]
Abstract
In this work, Ti/SnO2-RuO2 dimensionally stable anode has been successfully fabricated via thermal decomposition method and further used for highly efficient electrocatalytic degradation of alizarin cyanin green (ACG) dye wastewater. The morphology, crystal structure and composition of Ti/SnO2-RuO2 electrode are characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray fluorescence spectroscopy (XRF), respectively. The result of accelerated life test suggests that as-prepared Ti/SnO2-RuO2 anode exhibits excellent electrochemical stability. Some parameters, such as reaction temperature, initial pH, electrode spacing and current density, have been investigated in detail to optimize the degradation condition of ACG. The results show that the decolorization efficiency and chemical oxygen demand removal efficiency of ACG reach up to 80.4% and 51.3% after only 40 min, respectively, under the optimal condition (reaction temperature 25 °C, pH 5, electrode spacing 1.0 cm and current density 3 mA cm-2). Furthermore, the kinetics analysis reveals that the process of electrocatalytic degradation of ACG follows the law of quasi-first-order kinetics. The excellent electrochemical activity demonstrates that the Ti/SnO2-RuO2 electrode presents a favorable application prospect in the electrochemical treatment of anthraquinone dye wastewater.
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Affiliation(s)
- Shouxian Chen
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Lianhong Zhou
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Tiantian Yang
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Qihang He
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Pengcheng Zhou
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Ping He
- State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China.
| | - Faqin Dong
- Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, PR China
| | - Hui Zhang
- International Science and Technology Cooperation Laboratory of Micro-nanoparticle Application Research, Mianyang, 621010, Sichuan, PR China; Department of Chemical and Biochemical Engineering, Western University, London, Ontario, N6A 5B9, Canada
| | - Bin Jia
- Key Laboratory of Shock and Vibration of Engineering Materials and Structures of Sichuan Province, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, PR China
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Liu T, Miao D, Liu G, Wei Q, Zhou K, Yu Z, Ma L. A novel gradient current density output mode for effective electrochemical oxidative degradation of dye wastewater by boron-doped diamond (BDD) anode. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 82:2085-2097. [PMID: 33263586 DOI: 10.2166/wst.2020.473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In order to solve the problems of high energy consumption and low current efficiency in electrochemical oxidation (EO) degradation under the traditional constant output process (COP), a gradient output process (GOP) of current density is proposed in this paper. That is, the current density is gradually reduced in a fixed degradation time, and the Reactive Blue 19 simulated dye wastewater was used as the degradation target. The general applicability of the process was further confirmed by studying the optimal gradient current density output parameters, the dye concentration, electrolyte concentration and other dye compounds with different molecular structures. The corresponding results show that the chemical oxygen demand (COD) removal (78%) and the color removal (100%) under the GOP are similar to those in the COP, and the overall energy consumption is reduced by about 50% compared with that in the traditional constant current mode. Moreover, the current efficiency in the middle and late stages of EO process has increased by 8.6 times compared with COP.
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Affiliation(s)
- Ting Liu
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail: ; The authors contributed equally to this work and should be considered co-first authors
| | - Dongtian Miao
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail: ; The authors contributed equally to this work and should be considered co-first authors
| | - Guoshuai Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Qiuping Wei
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
| | - Kechao Zhou
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
| | - Zhiming Yu
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
| | - Li Ma
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
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Patidar R, Srivastava VC. Mechanistic insight into ultrasound-induced enhancement of electrochemical oxidation of ofloxacin: Multi-response optimization and cost analysis. CHEMOSPHERE 2020; 257:127121. [PMID: 32512327 DOI: 10.1016/j.chemosphere.2020.127121] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 05/09/2020] [Accepted: 05/17/2020] [Indexed: 06/11/2023]
Abstract
In this paper, a hybrid advanced oxidation process of sonoelectrochemical, in which ultrasound and electrochemical are applied simultaneously, has been used for the degradation of ofloxacin (bio-recalcitrant pharmaceutical pollutant). Response surface methodology based central composite design was applied to understand the parametric effects of ultrasonic power, current density, initial pH, and electrolyte dose. Enhanced ofloxacin degradation was obtained using sonoelectrochemical (≈95%) process in comparison to the electrochemical (≈60.6%) and sonolysis alone (≈7.2%) after 120 min treatment time. Multi-response optimization was used so as to maximize COD removal (70.12%) and minimize specific energy consumption (11.92 kWh (g COD removed)-1)at the optimized parametric condition of pH = 6.3 (natural pH), ultrasonic power = 54 W, current density = 213 A m-2, and Na2SO4 electrolyte dose = 2.0 g L-1. It was revealed that •OH radicals contribute major to the ofloxacin degradation reaction among the other oxidizing agents. Degradation of the ofloxacin followed pseudo-first-order kinetics with a higher reaction rate, which confirmed the synergistic effect of 34% between ultrasound and electrochemical approaches. The degradation pathway of ofloxacin removal was elucidated at optimum condition by the temporal evolution of the intermediate compounds and final products using gas chromatography coupled with mass spectroscopy (GC-MS), liquid chromatography-mass spectroscopy (LC-MS), high-resolution mass spectroscopy (HR-MS), and Fourier transform infrared spectroscopy (FTIR). Atomic force microscopy (AFM) and field emission scanning electron microscope (FE-SEM) coupled with energy dispersed X-ray (EDX) were used to determine the morphology of electrodes. Operational cost analysis was done based on the reactor employed in the present study.
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Affiliation(s)
- Ritesh Patidar
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India.
| | - Vimal Chandra Srivastava
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India.
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Yang W, Liu G, Chen Y, Miao D, Wei Q, Li H, Ma L, Zhou K, Liu L, Yu Z. Persulfate enhanced electrochemical oxidation of highly toxic cyanide-containing organic wastewater using boron-doped diamond anode. CHEMOSPHERE 2020; 252:126499. [PMID: 32224356 DOI: 10.1016/j.chemosphere.2020.126499] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 02/24/2020] [Accepted: 03/13/2020] [Indexed: 06/10/2023]
Abstract
Cyanide-containing organic wastewater is discharged in large quantities by coking, electroplating and pharmaceutical industries, which seriously endangers environmental safety and human health. In this paper, Electrochemical Oxidation-Persulfate (EO-PS) Advanced Oxidation Process (AOP) was firstly used to treat high concentration cyanide-containing organic wastewater obtained from a chemical enterprise. The potential application of this process in the treatment of high concentration cyanide-containing organic wastewater was explored for the first time, and the effects of current density, initial pH, temperature and initial concentration on chemical oxygen demand (COD), total organic carbon (TOC) and total cyanide (CN-) removal in wastewater were systematically investigated. The results shown that the EO-PS process had an excellent removal effect on organics and cyanide in high concentration cyanide-containing organic wastewater which contained 11,290 mg L-1 COD, 4456 mg L-1 TOC and 1280.15 mg L-1 CN-. The COD, TOC and CN- removal at optimized operating parameters for 24 h were 95.8%, 87.8% and 98.4%, respectively. The corresponding electrical energy per order was only 41.6 kWh m-3 order-1. In addition, the pollutants removal can be accelerated under conditions of high current density, acidic solution, appropriate temperature and low pollutant concentration, among which low current density, low pH, appropriate temperature and low pollutant concentration can effectively diminish energy consumption. Cyanide, COD and TOC degradation in all reaction conditions followed the pseudo-first-order kinetic model.
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Affiliation(s)
- Wanlin Yang
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Guoshuai Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China
| | - Yinhao Chen
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Dongtian Miao
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Qiuping Wei
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, 410083, People's Republic of China.
| | - Haichao Li
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Li Ma
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Kechao Zhou
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Libin Liu
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, 410083, People's Republic of China
| | - Zhiming Yu
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha, 410083, People's Republic of China
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Miao D, Liu G, Wei Q, Hu N, Zheng K, Zhu C, Liu T, Zhou K, Yu Z, Ma L. Electro-activated persulfate oxidation of malachite green by boron-doped diamond (BDD) anode: effect of degradation process parameters. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 81:925-935. [PMID: 32541111 DOI: 10.2166/wst.2020.176] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this paper, boron-doped diamond (BDD) electro-activated persulfate was studied to decompose malachite green (MG). The degradation results indicate that the decolorization performance of MG for the BDD electro-activated persulfate (BDD-EAP) system is 3.37 times that of BDD electrochemical oxidation (BDD-EO) system, and BDD-EAP system also exhibited an enhanced total organic content (TOC) removal (2.2 times) compared with BDD-EO system. Besides, the degradation parameters such as persulfate concentration, current density, and pH were studied in detail. In a wider range of pH (2-10), the MG can be efficiently removed (>95%) in 0.02 M persulfate solution with a low current density of 1.7 mA/cm2 after 30 min. The BDD-EAP technology decomposes organic compounds without the diffusion limitation and avoids pH adjustment, which makes the EO treatment of organic wastewater more efficient and more economical.
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Affiliation(s)
- Dongtian Miao
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
| | - Guoshuai Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Qiuping Wei
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
| | - Naixiu Hu
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
| | - Kuangzhi Zheng
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
| | - Chengwu Zhu
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
| | - Ting Liu
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
| | - Kechao Zhou
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
| | - Zhiming Yu
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
| | - Li Ma
- State Key Laboratory of Powder Metallurgy, School of Materials Science and Engineering, Central South University, Changsha 410083, China E-mail:
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Sartaj S, Ali N, Khan A, Malik S, Bilal M, Khan M, Ali N, Hussain S, Khan H, Khan S. Performance evaluation of photolytic and electrochemical oxidation processes for enhanced degradation of food dyes laden wastewater. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 81:971-984. [PMID: 32541115 DOI: 10.2166/wst.2020.182] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Wastewater containing dyes is considered as the top-priority pollutant when discharged into the environment. Herein, we report for the applicability of 254 nm ultraviolet light and electrochemical process using a titanium ruthenium oxide anode for the degradation of Allura red and erythrosine dyes. During the photolytic process, 95% of Allura red dye (50 ppm) was removed after 1 h at pH 12 and 35 °C, whereas 90% color removal of erythrosine dye (50 ppm) was achieved after 6 h of treatment at pH 6.0 and 30 °C. On the other hand, 99.60% of Allura red dye (200 ppm) was removed within 5 min by the electrochemical process applying a current density (5 mA cm-2) at pH 5.0 and 0.1 mol L-1 sodium chloride (NaCl) electrolytic medium. Similarly, 99.61% of erythrosine dye (50 ppm) degradation was achieved after 10 min at a current density of 8 mA cm-2, pH 6.0, and 0.1 mol L-1 of NaCl electrolyte. The minimum energy consumption value for Allura red and erythrosine dyes (0.196 and 0.941 kWh m-3, respectively) was calculated at optimum current densities of 5 and 8 mA cm-2. The results demonstrated that the electrochemical process is more efficient at removing dyes in a shorter time than the photolytic process since it generates powerful oxidants like the chlorine molecule, hypochlorous acid, and hypochlorite on the surface of the anode and initiates a chain reaction to oxidize the dyes molecules.
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Affiliation(s)
- Seema Sartaj
- Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, National & Local Joint Engineering Research Center for Deep Utilization Technology of Rock-salt Resource, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian 223003, China; Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa 25120, Pakistan
| | - Nisar Ali
- Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, National & Local Joint Engineering Research Center for Deep Utilization Technology of Rock-salt Resource, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian 223003, China
| | - Adnan Khan
- Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa 25120, Pakistan
| | - Sumeet Malik
- Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa 25120, Pakistan
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China E-mail:
| | - Menhad Khan
- Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa 25120, Pakistan
| | - Nauman Ali
- Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa 25120, Pakistan
| | - Sajjad Hussain
- Faculty of Materials & Chemical Engineering GIK, Institute of Engineering Sciences & Technology, 23460 Topi, KP, Pakistan
| | - Hammad Khan
- Faculty of Materials & Chemical Engineering GIK, Institute of Engineering Sciences & Technology, 23460 Topi, KP, Pakistan
| | - Sabir Khan
- Department of Analytical Chemistry, Institute of Chemistry, State University of São Paulo (UNESP), 14801-970 Araraquara, SP, Brazil
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Zhang Z, Chen H, Wu W, Pang W, Yan G. Efficient removal of Alizarin Red S from aqueous solution by polyethyleneimine functionalized magnetic carbon nanotubes. BIORESOURCE TECHNOLOGY 2019; 293:122100. [PMID: 31518817 DOI: 10.1016/j.biortech.2019.122100] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 08/29/2019] [Accepted: 08/31/2019] [Indexed: 06/10/2023]
Abstract
Alizarin Red S (ARS) has been extensively used in the dyeing industry. In order to effectively remove the ARS form dyeing wastewater, polyethyleneimine (PEI)-functionalized magnetic carbon nanotubes (PEI@MCNTs) adsorbent was successfully prepared and its adsorption performances were also investigated in detail. The PEI@MCNTs could efficiently remove the ARS from acidic aqueous solution (pH ≤ 6.0) within 40 min under room temperature. Benefiting from a large number of adsorption sites and multiple interactions, PEI@MCNTs possessed high selectivity towards ARS with spontaneous adsorption process. The maximum adsorption capacity of PEI@MCNTs for ARS was 196.08 mg g-1 obtained from Langmuir isotherm, higher than that of available conventional adsorbents. Moreover, the PEI@MCNTs could be easily collected by an external magnet, and then effectively regenerated through 10 mM NaOH solution. The prepared PEI@MCNTs could be considered as the promising adsorbent for the removal of anthraquinone dyes in large-scale wastewater treatment.
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Affiliation(s)
- Zhifeng Zhang
- Shanxi Normal University, Linfen, Shanxi 041000, China.
| | - Huijuan Chen
- Shanxi Normal University, Linfen, Shanxi 041000, China
| | - Wenmei Wu
- Shanxi Normal University, Linfen, Shanxi 041000, China
| | - Wenting Pang
- Shanxi Normal University, Linfen, Shanxi 041000, China
| | - Guiqin Yan
- Shanxi Normal University, Linfen, Shanxi 041000, China
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Machineni L. Review on biological wastewater treatment and resources recovery: attached and suspended growth systems. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2019; 80:2013-2026. [PMID: 32198320 DOI: 10.2166/wst.2020.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The treatment of wastewater for reuse is a potential solution to meet ever increasing urban, industrial, agricultural, and environmental demands across the world, where clean water availability is scarce. There are several traditional wastewater treatment processes that offer varying degrees of effectiveness in addition to presenting environmental, economic, and social disadvantages. Development of promising and inexpensive technologies to provide the reusable water in needful amounts using wastewaters as a cheap source of key nutrients and organic matter is required. Wastewater treatment by biological methods is becoming more important in the light of recovering value-added plant nutrients, heavy metals, biosolids, and bioenergy resources. Different types of solid contaminants in effluents can be removed simultaneously by pure cultures or mixed microbial consortia. Based on the structural organization of microbial biomass, biological treatment systems are classified into two types: dispersed growth system and attached growth system. Biological treatment methods associated with fixed-film growth have been recognized as highly effective and more energy efficient than suspended growth systems. This review discusses the recent breakthroughs in advanced biological wastewater treatment using both the systems, and also focuses on key energetic resources recovery driven by biological technologies.
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An Easy Synthesis for Preparing Bio-Based Hybrid Adsorbent Useful for Fast Adsorption of Polar Pollutants. NANOMATERIALS 2019; 9:nano9050731. [PMID: 31083562 PMCID: PMC6566375 DOI: 10.3390/nano9050731] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 05/03/2019] [Accepted: 05/06/2019] [Indexed: 12/01/2022]
Abstract
For the first time, γ-Al2O3 and Bio-Based Substances (BBS) hybrids (A-BBS) were prepared through a simple electrostatic interaction occurring between alumina, used as a support, and BBS (Bio-Based Substance from composted biowastes) carrying positive and negative charges, respectively. We evaluated the optimal amount of BBS to be immobilized on the support and the stability of the resulting A-BBS in order to use this novel hybrid material as an adsorbent for the removal of polar pollutants. Characterization was carried out by X-Ray Diffraction (XRD) for evaluating the crystal structure of the support, Fourier transform infrared spectroscopy (FT-IR) to evidence the presence of BBS on the hybrid material, thermogravimetric analysis (TGA) to measure the thermal stability of the hybrid materials and quantify the BBS amount immobilized on the support, N2 adsorption at 77 K for the evaluation of the surface area and porosity of the systems, Zeta potential measurements to evaluate the effect of BBS immobilization on the surface charge of the particles and choose the substrates possibly interacting with them. Firstly, we tested the adsorption capability of three samples differently coated with BBS toward cationic species considering various adsorbate/adsorbent ratio. Crystal Violet (CV) was chosen as model pollutant to compare the performance of the hybrid materials with those of other materials described in the literature. The adsorption data were modeled by Langmuir and Freundlich adsorption isotherms. Then, we studied the adsorption capability of the developed material towards molecules with different structures; for this purpose, two contaminants of emerging concerns (carbamazepine and atenolol) were tested. The results indicate that A-BBS could be applied in wastewater treatment for the removal of a significant amount of polar species. In addition, a comparison with literature data concerning CV adsorption was carried out in order to evaluate the environmental impact of synthetic routes used to prepare different adsorbents.
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He Y, Lin H, Guo Z, Zhang W, Li H, Huang W. Recent developments and advances in boron-doped diamond electrodes for electrochemical oxidation of organic pollutants. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.11.056] [Citation(s) in RCA: 156] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Abstract
The reduced natural waters and the large amount of wastewater produced by textile industry necessitate an effective water reuse treatment. In this study, a combined two-stage water reuse treatment was established to enhance the quality and recovery rate of reused water. The primary treatment incorporated a flocculation and sedimentation system, two sand filtration units, an ozonation unit, an ultrafiltration (UF) system, and a reverse osmosis (RO) system. The second treatment included an ozonation unit, a sand filtration unit, and UF and RO systems. The color removal rate increased with the increasing ozone dosage, and the relational expression between the ozone dosage and color removal rate was fitted. Ozonation greatly reduced the color by 92.59 and 97.27 times during the primary and second ozonation stages, respectively. RO had the highest removal rate. The combined processes showed good performance in water reuse treatment. The treated, reused water satisfied the reuse standard and surpassed the drinking water standard rates for chemical oxygen consumption (CODcr), color, NH3-N, hardness, Cl−, SO42−, turbidity, Fe3+, and Cu2+. The operating cost of reuse water treatment was approximately 0.44 USD·m−3.
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Gao X, Li W, Mei R, Zhu C, Zhou B, Ma L, Wei Q, Liu T. Effect of the B2H6/CH4/H2 ratios on the structure and electrochemical properties of boron-doped diamond electrode in the electrochemical oxidation process of azo dye. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2018.11.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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