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Dhanda V, Kumar R, Yadav N, Sangwan S, Duhan A. Ultimate fate, transformation, and toxicological consequences of herbicide pretilachlor to biotic components and associated environment: An overview. J Appl Toxicol 2024; 44:41-65. [PMID: 37350328 DOI: 10.1002/jat.4507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/05/2023] [Accepted: 06/05/2023] [Indexed: 06/24/2023]
Abstract
Herbicides are applied for effective weed management in order to increase the crop yield. In recent decades, the overuse of these chemicals has posed adverse effects on different biotic components of the environment. Pretilachlor has been widely used during last few decades for weed management in paddy crop. Its excessive use may prove fatal for environment, various organisms, and nontarget plants. Thus, it is pertinent to know the extent to which herbicide residues remain in environment. The potential mobility and the release rate of herbicide in the soil are important factors governing ecotoxicological impact and degradation rate. Therefore, several techniques are being investigated for its effective removal from the contaminated sites. Furthermore, efforts have also been made to study the degradation of pretilachlor by various physicochemical processes, resulting into the formation of different types of metabolites. This review summarizes the available information on environmental fate, various degradation processes, microbial biotransformation, metabolites formed, ecotoxicological effects, techniques for detection in environmental samples, effect of safener, and various control release formulations for sustained release of pretilachlor in applied fields. The information so obtained will be very advantageous in deciding the future policies for safe and judicious use of the herbicide by maintaining health and environmental sustainability.
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Affiliation(s)
- Vidhi Dhanda
- Department of Chemistry, Chaudhary Charan Singh Haryana Agricultural University Hisar, Hisar, Haryana, India
| | - Ravi Kumar
- Department of Chemistry, Chaudhary Charan Singh Haryana Agricultural University Hisar, Hisar, Haryana, India
| | - Neelam Yadav
- Department of Chemistry, Chaudhary Charan Singh Haryana Agricultural University Hisar, Hisar, Haryana, India
| | - Sarita Sangwan
- Department of Chemistry, Chaudhary Charan Singh Haryana Agricultural University Hisar, Hisar, Haryana, India
| | - Anil Duhan
- Department of Chemistry, Chaudhary Charan Singh Haryana Agricultural University Hisar, Hisar, Haryana, India
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Kwatra N, Abraham J. Biomineralization of pretilachlor by free and immobilized fungal strains isolated from paddy field. Arch Microbiol 2023; 205:188. [PMID: 37052710 DOI: 10.1007/s00203-023-03538-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 04/03/2023] [Indexed: 04/14/2023]
Abstract
The excessive use of pretilachlor (a chloroacetamide herbicide) has raised concern throughout the world as it has been reported as highly toxic. The present study deals with isolating and screening pretilachlor degrading fungal strains. The strains Aspergillus ficuum (AJN2) and Aspergillus sp. (PDF1) isolated using enrichment technique were able to degrade 79% and 73% of pretilachlor respectively as analyzed using HPLC. Further, the immobilization technique was used in the study the pretilachlor degradation ability of the isolated strains. The immobilized spores of the strains AJN2 and PDF1 mineralized 84% and 95% of pretilachlor respectively. The degradation dynamics study revealed that the DT50 value of the herbicide was reduced to 2.4 d in aqueous medium due to the enhanced enzymatic activity. The enzymatic study showed high lignin peroxidase and manganese peroxidase activity by the strains AJN2 and PDF1 respectively. The study confirmed the efficient degradation of pretilachlor by Aspergillus ficuum (AJN2).
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Affiliation(s)
- Nancy Kwatra
- Microbial Biotechnology Laboratory, School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India
| | - Jayanthi Abraham
- Microbial Biotechnology Laboratory, School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India.
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Yu M, Dong H, Liu K, Zheng Y, Hoffmann MR, Liu W. Porous carbon monoliths for electrochemical removal of aqueous herbicides by "one-stop" catalysis of oxygen reduction and H 2O 2 activation. JOURNAL OF HAZARDOUS MATERIALS 2021; 414:125592. [PMID: 34030423 DOI: 10.1016/j.jhazmat.2021.125592] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 02/12/2021] [Accepted: 03/03/2021] [Indexed: 06/12/2023]
Abstract
The overuse of herbicides has posed a threat to human health and the aquatic environment via DNA mutations and antibiotic gene resistance. Carbon-based cathodic electrochemical advanced oxidation has evolved as a promising technology for herbicide degradation by generating hydroxyl radicals (•OH). However, conventional electro-Fenton process relies on interaction of multiple species that adds to the system complexity and cost and narrows the working pH range. Herein, a series of porous carbon monoliths (PCMs) were developed as a "one-stop" platform for catalysis of the 2-electron ORR coupled with further catalytic reductive cleavage of H2O2 to produce •OH. A PCM prepared using 1,6-hexamethylene diamine (denoted as PCM-HDA) produced H2O2 at a level that was 374% higher than that obtained using commercially available carbon black at circum-neutral pH. Meanwhile, the generated H2O2 was catalytically decomposed to produce •OH. Based on these results, the PCM-HDA electrode achieved an 80 ± 2% degradation of napropamide in 60 min over the pH range of 4-10 at a mildly reducing potential, with a 69 ± 2% TOC reduction at circum-neutral condition in 2 h. This simplified system overcomes the system complexity and pH limitation of the conventional electron-Fenton processes.
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Affiliation(s)
- Menglin Yu
- College of Environmental and Resource Science Zhejiang University, Hangzhou 310058, China; Linde + Robinson Laboratories California Institute of Technology, Pasadena, CA 91125, United States
| | - Heng Dong
- Linde + Robinson Laboratories California Institute of Technology, Pasadena, CA 91125, United States
| | - Kai Liu
- Linde + Robinson Laboratories California Institute of Technology, Pasadena, CA 91125, United States
| | - Yingdie Zheng
- College of Environmental and Resource Science Zhejiang University, Hangzhou 310058, China
| | - Michael R Hoffmann
- Linde + Robinson Laboratories California Institute of Technology, Pasadena, CA 91125, United States
| | - Weiping Liu
- College of Environmental and Resource Science Zhejiang University, Hangzhou 310058, China.
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A Review of Modified Steel Slag Application in Catalytic Pyrolysis, Organic Degradation, Electrocatalysis, Photocatalysis, Transesterification and Carbon Capture and Storage. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11104539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
As a by-product of the iron and steel industry, steel slag is rich in catalytically active substances and can therefore be used as a solid catalyst. Many studies have shown that the application potential of steel slag in catalysis is huge, which provides new development space for its application, thereby increasing its additional utilization value. This article primarily reviews the research progress in catalytic fields such as catalytic pyrolysis, organic degradation, electrocatalysis, photocatalysis, transesterification, and carbon capture and storage, as well as the modification methods of steel slag. The catalytic performance of the modified steel slag has been further improved, and it has the meaningful characteristics of high efficiency, cleanliness, and low costs.
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Liu HM, Yuan M, Liu AM, Ren L, Zhu GP, Sun LN. A bifunctional enzyme belonging to cytochrome P450 family involved in the O-dealkylation and N-dealkoxymethylation toward chloroacetanilide herbicides in Rhodococcus sp. B2. Microb Cell Fact 2021; 20:61. [PMID: 33663497 PMCID: PMC7934444 DOI: 10.1186/s12934-021-01544-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 02/18/2021] [Indexed: 11/22/2022] Open
Abstract
Background The chloroacetamide herbicides pretilachlor is an emerging pollutant. Due to the large amount of use, its presence in the environment threatens human health. However, the molecular mechanism of pretilachlor degradation remains unknown. Results Now, Rhodococcus sp. B2 was isolated from rice field and shown to degrade pretilachlor. The maximum pretilachlor degradation efficiency (86.1%) was observed at a culture time of 5 d, an initial substrate concentration 50 mg/L, pH 6.98, and 30.1 °C. One novel metabolite N-hydroxyethyl-2-chloro-N-(2, 6-diethyl-phenyl)-acetamide was identified by gas chromatography-mass spectrometry (GC–MS). Draft genome comparison demonstrated that a 32,147-bp DNA fragment, harboring gene cluster (EthRABCDB2), was absent from the mutant strain TB2 which could not degrade pretilachlor. The Eth gene cluster, encodes an AraC/XylS family transcriptional regulator (EthRB2), a ferredoxin reductase (EthAB2), a cytochrome P450 monooxygenase (EthBB2), a ferredoxin (EthCB2) and a 10-kDa protein of unknown function (EthDB2). Complementation with EthABCDB2 and EthABDB2, but not EthABCB2 in strain TB2 restored its ability to degrade chloroacetamide herbicides. Subsequently, codon optimization of EthABCDB2 was performed, after which the optimized components were separately expressed in Escherichia coli, and purified using Ni-affinity chromatography. A mixture of EthABCDB2 or EthABDB2 but not EthABCB2 catalyzed the N-dealkoxymethylation of alachlor, acetochlor, butachlor, and propisochlor and O-dealkylation of pretilachlor, revealing that EthDB2 acted as a ferredoxin in strain B2. EthABDB2 displayed maximal activity at 30 °C and pH 7.5. Conclusions This is the first report of a P450 family oxygenase catalyzing the O-dealkylation and N-dealkoxymethylation of pretilachlor and propisochlor, respectively. And the results of the present study provide a microbial resource for the remediation of chloroacetamide herbicides-contaminated sites.![]()
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Affiliation(s)
- Hong-Ming Liu
- The Research Center of Life Omics and Health, Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, Anhui Normal University, Wuhu, 241000, Anhui, People's Republic of China
| | - Meng Yuan
- The Research Center of Life Omics and Health, Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, Anhui Normal University, Wuhu, 241000, Anhui, People's Republic of China
| | - Ai-Min Liu
- The Research Center of Life Omics and Health, Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, Anhui Normal University, Wuhu, 241000, Anhui, People's Republic of China
| | - Lei Ren
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Guo-Ping Zhu
- The Research Center of Life Omics and Health, Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, Anhui Normal University, Wuhu, 241000, Anhui, People's Republic of China.
| | - Li-Na Sun
- Eco-Environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, 201403, People's Republic of China.
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Huang L, Li D, Liu J, Yang L, Dai C, Ren N, Feng Y. CFD simulation of mass transfer in electrochemical reactor with mesh cathode for higher phenol degradation. CHEMOSPHERE 2021; 262:127626. [PMID: 32777608 DOI: 10.1016/j.chemosphere.2020.127626] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/03/2020] [Accepted: 07/04/2020] [Indexed: 06/11/2023]
Abstract
Cathode, where electro-catalytic oxidation barely took place, could exert a significant influence on electro-catalytic efficiency, whereas little investigation has been focused on this effect. In this study, the effect of cathode configuration on electro-catalytic activities was investigated with phenol as model pollutant, and the mechanism was revealed from the perspective of mass transfer with computational fluid dynamics (CFD) simulation. Compared with the planar Ti cathode, the electro-catalytic reactor with mesh Ti exhibited 1.21-1.26 times faster phenol degradation rate under various testing inlet flow rates. CFD simulation revealed the higher velocity distribution both in the reactor and on anode surface when meshed Ti cathode was used, which benefited faster fluid flow so that the pollutant transfer was accelerate especially at higher inlet flow rate. Excellent agreement of mass transfer between CFD simulation and experimental analysis was achieved, the mass transfer coefficient with mesh Ti was 1.40-1.55 times of the case with planar cathode under various inlet flow rates. The enhanced mass transfer performance was mainly ascribed to the rhombic pores of mesh cathode where hydrogen bubbles generated on would escape timely and randomly at various directions, leading to the disturbance of fluid flow around the anode. This study highlighted mesh cathode played a key role in improving pollutant degradation, and CFD, as a versatile and convenient tool to analyze the hydrodynamic behavior of electro-catalytic reactor, showed a strong persuasion to guide the optimization of electrode configuration.
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Affiliation(s)
- Linlin Huang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Da Li
- School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Junfeng Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Lisha Yang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Changchao Dai
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Nanqi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Yujie Feng
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China.
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Huang L, Li D, Liu J, Yang L, Dai C, Ren N, Feng Y. Enhanced mass transfer and service time of mesh Ti/Sb-SnO 2 electrode for electro-catalytic oxidation of phenol. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:42072-42081. [PMID: 32705558 DOI: 10.1007/s11356-020-10070-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
Titanium-based SnO2 with Sb dopant (Ti/Sb-SnO2) was of interest in the field of electro-catalytic oxidation due to its high organic oxidation rates. However, the relatively poor mass transfer performance and short service time limited its practical application. To overcome this problem, Ti/Sb-SnO2 electrode was fabricated on mesh substrate and used as the anode for electrochemical oxidization of phenol. Compared to the anode prepared on planar Ti, the mesh anode with compact and uniform catalyst surface lowered electron transfer resistance and higher Oads content (17.41%), which benefited the generation of hydroxyl radicals (·OH) (increment of 24.5%). In addition, this structure accelerated the fluid perturbation around electrode in microscopic scale as the COMSOL simulation result indicated; the electric potential on mesh anode varied regularly along the undulant terrain of electrode so that the mass transfer coefficient was enhanced by 1.67 times. These structure-dependent characteristics contributed to the superior electro-catalytic performance toward degradation of phenol. Experimental results showed that mesh anode had a higher TOC removal efficiency of 90.6% and mineralization current efficiency of 20.1% at current density of 10 mA cm-2, which was 9.95% and 21.6% higher than the planar anode, and the service lifetime was 1.89 times longer than planar anode. This highly electro-catalytically active and stable Ti/Sb-SnO2 mesh electrode showed a potential application prospect toward electro-catalytic degradation process.
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Affiliation(s)
- Linlin Huang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Da Li
- School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Junfeng Liu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Lisha Yang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Changchao Dai
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Nanqi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Yujie Feng
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China.
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Barrera H, Roa‐Morales G, Balderas‐Hernández P, Barrera‐Díaz CE, Frontana‐Uribe BA. Catalytic Effect of Hydrogen Peroxide in the Electrochemical Treatment of Phenolic Pollutants using a BDD Anode. ChemElectroChem 2019. [DOI: 10.1002/celc.201900174] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Héctor Barrera
- Centro Conjunto de Investigación de Química Sustentable CCIQSUAEM-UNAM Carretera Toluca Atlacomulco, km 14.5, C.P. 50200 Toluca, Estado de México México
| | - Gabriela Roa‐Morales
- Centro Conjunto de Investigación de Química Sustentable CCIQSUAEM-UNAM Carretera Toluca Atlacomulco, km 14.5, C.P. 50200 Toluca, Estado de México México
| | - Patricia Balderas‐Hernández
- Centro Conjunto de Investigación de Química Sustentable CCIQSUAEM-UNAM Carretera Toluca Atlacomulco, km 14.5, C.P. 50200 Toluca, Estado de México México
| | - Carlos E. Barrera‐Díaz
- Centro Conjunto de Investigación de Química Sustentable CCIQSUAEM-UNAM Carretera Toluca Atlacomulco, km 14.5, C.P. 50200 Toluca, Estado de México México
| | - Bernardo A. Frontana‐Uribe
- Centro Conjunto de Investigación de Química Sustentable CCIQSUAEM-UNAM Carretera Toluca Atlacomulco, km 14.5, C.P. 50200 Toluca, Estado de México México
- Universidad Nacional Autónoma de MéxicoInstituto de Química Circuito exterior Ciudad Universitaria Ciudad de México 04510 México
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Fan TX, Cai Y, Chu GW, Luo Y, Zhang LL, Chen JF. A Novel Rotating Multielectrodes Reactor for Electrochemical Oxidation Process Intensification. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b05736] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Liu H, Ren M, Zhang Z, Qu J, Ma Y, Lu N. A novel electrocatalytic approach for effective degradation of Rh-B in water using carbon nanotubes and agarose. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:12361-12372. [PMID: 29455356 DOI: 10.1007/s11356-018-1516-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 02/08/2018] [Indexed: 06/08/2023]
Abstract
Carbon nanotubes (CNTs)/agarose (AG) membrane on the ITO (indium tin oxide) conductive glass, with high efficiency of electrocatalytic degradation for rhodamine B (Rh-B) in water, was prepared using an easy and green method. The prepared CNTs/AG membrane was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectra (EDS), infrared spectroscopy (IR), and electrochemical impedance spectroscopy (EIS). The results revealed that CNTs were dispersed in the AG membrane. Additionally, the electrocatalytic activities for Rh-B were conducted on the electrochemical workstation with a three-electrode system. Both initial pH and potential played an important role in the process of electrocatalytic degradation. At pH 3 and potential reaching 4 V, the removal rate of Rh-B (10 mg/L) in water achieved 96% within 20 min. The stability of the prepared CNTs/AG membrane was also investigated. Besides, the toxicities of the main intermediates from the electrocatalytic degradation for Rh-B were calculated using the ECOSAR program and EPIWIN software, and results indicated that the toxicities of some intermediates were higher than those of the parent pollutant (Rh-B). These findings provided a light-spot to simplify the preparation of efficient working electrode and emphasized the possible potential risks from intermediates at the same time.
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Affiliation(s)
- Haiyang Liu
- School of Environment, Northeast Normal University, No. 2555 Jingyue Street, Changchun, Jilin, 130117, China
| | - Miao Ren
- School of Environment, Northeast Normal University, No. 2555 Jingyue Street, Changchun, Jilin, 130117, China
| | - Zhaocheng Zhang
- School of Environment, Northeast Normal University, No. 2555 Jingyue Street, Changchun, Jilin, 130117, China
| | - Jiao Qu
- School of Environment, Northeast Normal University, No. 2555 Jingyue Street, Changchun, Jilin, 130117, China.
| | - Ying Ma
- School of Environment, Northeast Normal University, No. 2555 Jingyue Street, Changchun, Jilin, 130117, China
| | - Nan Lu
- School of Environment, Northeast Normal University, No. 2555 Jingyue Street, Changchun, Jilin, 130117, China.
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Wang Z, He X, Li J, Qi J, Zhao C, Yang G. Preparation of magnetic steel-slag particle electrode and its performance in a novel electrochemical reactor for oilfield wastewater advanced treatment. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2017.09.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hou X, Huang X, Jia F, Ai Z, Zhao J, Zhang L. Hydroxylamine Promoted Goethite Surface Fenton Degradation of Organic Pollutants. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:5118-5126. [PMID: 28358480 DOI: 10.1021/acs.est.6b05906] [Citation(s) in RCA: 220] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
In this study, we construct a surface Fenton system with hydroxylamine (NH2OH), goethite (α-FeOOH), and H2O2 (α-FeOOH-HA/H2O2) to degrade various organic pollutants including dyes (methyl orange, methylene blue, and rhodamine B), pesticides (pentachlorophenol, alachlor, and atrazine), and antibiotics (tetracycline, chloramphenicol, and lincomycin) at pH 5.0. In this surface Fenton system, the presence of NH2OH could greatly promote the H2O2 decomposition on the α-FeOOH surface to produce ·OH without releasing any detectable iron ions during the alachlor degradation, which was different from some previously reported heterogeneous Fenton counterparts. Moreover, the ·OH generation rate constant of this surface Fenton system was 102-104 times those of previous heterogeneous Fenton processes. The interaction between α-FeOOH and NH2OH was investigated with using attenuated total reflectance Fourier transform infrared spectroscopy and density functional theory calculations. The effective degradation of organic pollutants in this surface Fenton system was ascribed to the efficient Fe(III)/Fe(II) cycle on the α-FeOOH surface promoted by NH2OH, which was confirmed by X-ray photoelectron spectroscopy analysis. The degradation intermediates and mineralization of alachlor in this surface Fenton system were then systematically investigated using total organic carbon and ion chromatography, liquid chromatography-mass spectrometry, and gas chromatography-mass spectrometry. This study offers a new strategy to degrade organic pollutants and also sheds light on the environmental effects of goethite.
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Affiliation(s)
- Xiaojing Hou
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Xiaopeng Huang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Falong Jia
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Zhihui Ai
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Jincai Zhao
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Lizhi Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, Central China Normal University , Wuhan 430079, P. R. China
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Hou X, Huang X, Ai Z, Zhao J, Zhang L. Ascorbic acid/Fe@Fe2O3: A highly efficient combined Fenton reagent to remove organic contaminants. JOURNAL OF HAZARDOUS MATERIALS 2016; 310:170-178. [PMID: 26921510 DOI: 10.1016/j.jhazmat.2016.01.020] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Revised: 12/18/2015] [Accepted: 01/09/2016] [Indexed: 06/05/2023]
Abstract
In this study, we demonstrate that the combination of ascorbic acid and Fe@Fe2O3 core-shell nanowires (AA/Fe@Fe2O3) offers a highly efficient Fenton reagent. This combined Fenton reagent exhibited extremely high activity on the decomposition of H2O2 to produce OH for the degradation of various organic contaminants, including rhodamine B, methylene blue, alachlor, atrazine, siduron, lincomycin, and chloroamphenicol. The contaminant degradation constants in the AA/Fe@Fe2O3/H2O2 Fenton systems were 38-53 times higher than those in the conventional homogeneous Fenton system (Fe(II)/H2O2) at pH 3.8. Moreover, the OH generation rate constant in the AA/Fe@Fe2O3/H2O2 Fenton system was 1-3 orders of magnitudes greater than those of heterogeneous Fenton systems developed with other iron-containing materials (α-FeOOH, α-Fe2O3, FeOCl, and so on). The high activity of AA/Fe@Fe2O3 was attributed to the effective Fe(III)/Fe(II) cycle and the iron-ascorbate complex formation to stabilize ferrous ions with desirable and steady concentrations. During the AA/Fe@Fe2O3/H2O2 Fenton process, ascorbic acid served as a reducing and complexing reagent, enabling the reuse of Fe@Fe2O3 nanowires. We systematically investigated the alachlor and ascorbic acid degradation and found that they could be effectively degraded in the AA/Fe@Fe2O3/H2O2 system, accompanying with 100% of dechlorination and 92% of denitrification. This study sheds light on the importance of Fe(III)/Fe(II) cycle for the design of high efficient Fenton system and provides an alternative pathway for the organic contaminants removal.
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Affiliation(s)
- Xiaojing Hou
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Xiaopeng Huang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Zhihui Ai
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
| | - Jincai Zhao
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, PR China
| | - Lizhi Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
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Shan L, Liu J, Yu Y, Ambuchi JJ, Feng Y. Characterization of persistent colors and decolorization of effluent from biologically treated cellulosic ethanol production wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:10215-10222. [PMID: 26880521 DOI: 10.1007/s11356-016-6220-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 01/31/2016] [Indexed: 06/05/2023]
Abstract
The high chroma of cellulosic ethanol production wastewater poses a serious environmental concern; however, color-causing compounds are still not fully clear. The characteristics of the color compounds and decolorization of biologically treated effluent by electro-catalytic oxidation were investigated in this study. Excitation-emission matrix (EEM), fourier transform infrared spectrometer (FTIR), UV-Vis spectra, and ultrafiltration (UF) fractionation were used to analyze color compounds. High chroma of wastewater largely comes from humic materials, which exhibited great fluorescence proportion (67.1 %) in the biologically treated effluent. Additionally, the color compounds were mainly distributed in the molecular weight fractions with 3-10 and 10-30 kDa, which contributed 53.5 and 34.6 % of the wastewater color, respectively. Further decolorization of biologically treated effluent by electro-catalytic oxidation was investigated, and 98.3 % of color removal accompanied with 97.3 % reduction of humic acid-like matter was achieved after 180 min. The results presented herein will facilitate the development of a well decolorization for cellulosic ethanol production wastewater and better understanding of the biological fermentation.
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Affiliation(s)
- Lili Shan
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
| | - Junfeng Liu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
| | - Yanling Yu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China.
- School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, China.
| | - John J Ambuchi
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
| | - Yujie Feng
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China.
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15
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Martínez-Huitle CA, Rodrigo MA, Sirés I, Scialdone O. Single and Coupled Electrochemical Processes and Reactors for the Abatement of Organic Water Pollutants: A Critical Review. Chem Rev 2015; 115:13362-407. [PMID: 26654466 DOI: 10.1021/acs.chemrev.5b00361] [Citation(s) in RCA: 761] [Impact Index Per Article: 84.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Traditional physicochemical and biological techniques, as well as advanced oxidation processes (AOPs), are often inadequate, ineffective, or expensive for industrial water reclamation. Within this context, the electrochemical technologies have found a niche where they can become dominant in the near future, especially for the abatement of biorefractory substances. In this critical review, some of the most promising electrochemical tools for the treatment of wastewater contaminated by organic pollutants are discussed in detail with the following goals: (1) to present the fundamental aspects of the selected processes; (2) to discuss the effect of both the main operating parameters and the reactor design on their performance; (3) to critically evaluate their advantages and disadvantages; and (4) to forecast the prospect of their utilization on an applicable scale by identifying the key points to be further investigated. The review is focused on the direct electrochemical oxidation, the indirect electrochemical oxidation mediated by electrogenerated active chlorine, and the coupling between anodic and cathodic processes. The last part of the review is devoted to the critical assessment of the reactors that can be used to put these technologies into practice.
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Affiliation(s)
- Carlos A Martínez-Huitle
- Instituto de Química, Campus Universitário, Universidade Federal do Rio Grande do Norte , Av. Salgado Filho 3000 Campus Universitário Lagoa-Nova CEP 59078-970 Natal, RN, Brazil
| | - Manuel A Rodrigo
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Ciudad Real, Universidad de Castilla-La Mancha , Ciudad Real 13071, Spain
| | - Ignasi Sirés
- Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona , Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Onofrio Scialdone
- Dipartimento di Ingegneria Chimica, Gestionale, Informatica, Meccanica, Università degli Studi di Palermo , Palermo 90128, Italy
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16
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Madsen HT, Søgaard EG, Muff J. Study of degradation intermediates formed during electrochemical oxidation of pesticide residue 2,6-dichlorobenzamide (BAM) in chloride medium at boron doped diamond (BDD) and platinum anodes. CHEMOSPHERE 2015; 120:756-763. [PMID: 25465959 DOI: 10.1016/j.chemosphere.2014.10.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 09/22/2014] [Accepted: 10/26/2014] [Indexed: 06/04/2023]
Abstract
For electrochemical oxidation to become applicable in water treatment outside of laboratories, a number of challenges must be elucidated. One is the formation and fate of degradation intermediates of targeted organics. In this study the degradation of the pesticide residue 2,6-dichlorobenzamide, an important groundwater pollutant, was investigated in a chloride rich solution with the purpose of studying the effect of active chlorine on the degradation pathway. To study the relative importance of the anodic oxidation and active chlorine oxidation in the bulk solution, a non-active BDD and an active Pt anode were compared. Also, the effect of the active chlorine oxidation on the total amount of degradation intermediates was investigated. We found that for 2,6-dichlorobenzamide, active chlorine oxidation was determining for the initial step of the degradation, and therefore yielded a completely different set of degradation intermediates compared to an inert electrolyte. For the Pt anode, the further degradation of the intermediates was also largely dependent on active chlorine oxidation, while for the BDD anode anodic oxidation was most important. It was also found that the presence of active chlorine led to fewer degradation intermediates compared to treatment in an inert electrolyte.
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Affiliation(s)
- Henrik Tækker Madsen
- Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark.
| | - Erik Gydesen Søgaard
- Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark
| | - Jens Muff
- Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark
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17
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Preparation of catalytic particle electrodes from steel slag and its performance in a three-dimensional electrochemical oxidation system. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2013.12.065] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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18
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Zhang P, Tong M, Yuan S, Liao P. Transformation and removal of arsenic in groundwater by sequential anodic oxidation and electrocoagulation. JOURNAL OF CONTAMINANT HYDROLOGY 2014; 164:299-307. [PMID: 25041731 DOI: 10.1016/j.jconhyd.2014.06.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Accepted: 06/20/2014] [Indexed: 06/03/2023]
Abstract
Oxidation of As(III) to As(V) is generally essential for the efficient remediation of As(III)-contaminated groundwater. The performance and mechanisms of As(III) oxidation by an as-synthesized active anode, SnO2 loaded onto Ti-based TiO2 nanotubes (Ti/TiO2NTs/Sb-SnO2), were investigated. The subsequent removal of total arsenic by electrocoagulation (EC) was further tested. The Ti/TiO2NTs/Sb-SnO2 anode showed a high and lasting electrochemical activity for As(III) oxidation. 6.67μM As(III) in synthetic groundwater was completely oxidized to As(V) within 60min at 50mA. Direct electron transfer was mainly responsible at the current below 30mA, while hydroxyl radicals contributed increasingly with the increase in the current above 30mA. As(III) oxidation was moderately inhibited by the presence of bicarbonate (20mM), while was dramatically increased with increasing the concentration of chloride (0-10mM). After the complete oxidation of As(III) to As(V), total arsenic was efficiently removed by EC in the same reactor by reversing electrode polarity. The removal efficiency increased with increasing the current but decreased by the presence of phosphate and silica. Anodic oxidation represents an effective pretreatment approach to increasing EC removal of As(III) in groundwater under O2-limited conditions.
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Affiliation(s)
- Peng Zhang
- State Key Lab of Biogeology and Environmental Geology, China University of Geosciences, 388 Lumo Road, Wuhan 430074, PR China
| | - Man Tong
- State Key Lab of Biogeology and Environmental Geology, China University of Geosciences, 388 Lumo Road, Wuhan 430074, PR China
| | - Songhu Yuan
- State Key Lab of Biogeology and Environmental Geology, China University of Geosciences, 388 Lumo Road, Wuhan 430074, PR China.
| | - Peng Liao
- State Key Lab of Biogeology and Environmental Geology, China University of Geosciences, 388 Lumo Road, Wuhan 430074, PR China
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Madsen HT, Søgaard EG, Muff J. Study of degradation intermediates formed during electrochemical oxidation of pesticide residue 2,6-dichlorobenzamide (BAM) at boron doped diamond (BDD) and platinum-iridium anodes. CHEMOSPHERE 2014; 109:84-91. [PMID: 24873711 DOI: 10.1016/j.chemosphere.2014.03.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 03/04/2014] [Accepted: 03/06/2014] [Indexed: 06/03/2023]
Abstract
Electrochemical oxidation is a promising technique for degradation of otherwise recalcitrant organic micropollutants in waters. In this study, the applicability of electrochemical oxidation was investigated concerning the degradation of the groundwater pollutant 2,6-dichlorobenzamide (BAM) through the electrochemical oxygen transfer process with two anode materials: Ti/Pt90-Ir10 and boron doped diamond (Si/BDD). Besides the efficiency of the degradation of the main pollutant, it is also of outmost importance to control the formation and fate of stable degradation intermediates. These were investigated quantitatively with HPLC-MS and TOC measurements and qualitatively with a combined HPLC-UV and HPLC-MS protocol. 2,6-Dichlorobenzamide was found to be degraded most efficiently by the BDD cell, which also resulted in significantly lower amounts of intermediates formed during the process. The anodic degradation pathway was found to occur via substitution of hydroxyl groups until ring cleavage leading to carboxylic acids. For the BDD cell, there was a parallel cathodic degradation pathway that occurred via dechlorination. The combination of TOC with the combined HPLC-UV/MS was found to be a powerful method for determining the amount and nature of degradation intermediates.
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Affiliation(s)
- Henrik Tækker Madsen
- Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark.
| | - Erik Gydesen Søgaard
- Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark
| | - Jens Muff
- Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark.
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Chen F, Yu S, Dong X, Zhang L, Wu Q. Preparation and characterization of PbO₂ electrode and its application in electro-catalytic degradation of o-aminophenol in aqueous solution assisted by CuO-Ce₂O₃/γ-Al₂O₃ catalyst. JOURNAL OF HAZARDOUS MATERIALS 2013; 260:747-753. [PMID: 23846125 DOI: 10.1016/j.jhazmat.2013.06.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 06/14/2013] [Accepted: 06/15/2013] [Indexed: 06/02/2023]
Abstract
The electrochemical degradation of o-aminophenol (OAP) in aqueous solution was investigated by galvanostatic electrolysis using PbO₂ electrode as anode. The Ti/SnO₂-Sb₂O₃/PbO₂ anode was prepared by thermal decomposition and electro-deposition method, and was characterized by X-ray diffraction (XRD). The hydroxyl radicals electro-generated on anode were detected by fluorescence spectroscopy. The effects of initial pH and current density on the efficiency of the electrochemical degradation process were also studied. UV spectroscopy and chemical oxygen demand (COD) measurements were conducted to evaluate the removal effects of organic pollutants. The experimental results showed that the refractory organics in wastewater can be removed by pure electrochemical process, COD removal efficiency of 91.6% was obtained in 70 min at initial pH 11.0 and current density was equal to 50 mA cm(-2). In order to improve the efficiency of degradation and accelerate the reaction rate, a novel catalyst, γ-Al₂O₃ supported Ce-doped CuO, was synthesized by impregnating process and was characterized by X-ray photoelectron spectroscopy (XPS). The catalyst exhibited excellent catalytic activity in the electro-catalytic degradation of OAP wastewater and the COD removal efficiency of 91.7% was obtained in 20 min under mild conditions. Finally, a hypothetical mechanism of electro-catalytic degradation was proposed.
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Affiliation(s)
- Fengtao Chen
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, PR China.
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Duan X, Tian L, Liu W, Chang L. Study on electrochemical oxidation of 4-Chlorophenol on a vitreous carbon electrode using cyclic voltammetry. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.01.151] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Duan X, Ma F, Yuan Z, Chang L, Jin X. Electrochemical degradation of phenol in aqueous solution using PbO2 anode. J Taiwan Inst Chem Eng 2013. [DOI: 10.1016/j.jtice.2012.08.009] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lauryl benzene sulfonic acid sodium-carbon nanotube-modified PbO2 electrode for the degradation of 4-chlorophenol. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.05.036] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Comparative studies on the electro-catalytic oxidation performance of surfactant–carbon nanotube-modified PbO2 electrodes. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2012.05.012] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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