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Xu Y, Chen J. Activity and recyclability enhancement of pH-dependent Fe 0@BC-mediated heterogeneous sodium percarbonate (SPC)-reducing agents (RA) system. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 356:120596. [PMID: 38520858 DOI: 10.1016/j.jenvman.2024.120596] [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: 11/29/2023] [Revised: 02/04/2024] [Accepted: 03/10/2024] [Indexed: 03/25/2024]
Abstract
Dyes pose great threats to the aquatic environment and human health. Fe0-based Fenton-like systems have been widely employed for the degradation of organic dyes. However, the regulation of degradability and recyclability was still unclear. In this study, Rhodamine B (RhB) was served as the model pollutant, hydroxylamine hydrochloride was selected as the RA, the natural photocatalysis system demonstrated stable operation. RA, as performance enhancement agent, was firstly reported in micro/nano-Zero-Valent Iron@Biochar (m/nZVI@BC) based SPC-RA system. Carrier size-fractionated m/nZVI@BC was fabricated by one-step carbothermal method. As a result, RA synergistically interacted with SPC, and the reaction time reduced from 15 min to 4 min. In the 0.010 g m/nZVI@BC-mediated SPC-RA system, over 95% of RhB (100 mg·L-1, 1041.667 mg·g-1) was successfully degraded. The maximum degradation ability could still exceed 1g·g-1 via 5 times repeated applications. Meanwhile, the loss of degradability, caused by halving SPC concentration could be compensated by RA dosage measurement. The entire degradation process was predominantly dominated by free radicals (•OH> 1O2> •O2-> •CO3-). Reactive oxidizing species (ROSs) were primarily excited by α-Fe0, Fe3C and N sites of biochar (BC). Light and BC carrier dedicated slight influence. These discoveries shed a light on the activity and recyclability regulation of catalytic material, aligning with the principles of green chemistry and cleaner production. This study demonstrates a novel approach to efficient management of solid waste disposal, reuse of waste biomass, advanced treatment of dye-containing wastewater, pollution control in aquatic environments.
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Affiliation(s)
- Yan Xu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, 100083, PR China; School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, PR China
| | - Jiawei Chen
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, 100083, PR China; School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, PR China.
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Cao Y, Sheriff TS. The oxidative degradation of Calmagite using added and in situ generated hydrogen peroxide catalysed by manganese(II) ions: Efficacy evaluation, kinetics study and degradation pathways. CHEMOSPHERE 2022; 286:131792. [PMID: 34388875 DOI: 10.1016/j.chemosphere.2021.131792] [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: 05/26/2021] [Revised: 07/13/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
Manganese (II) ions (Mn(II)) catalyse the oxidative degradation of Calmagite (CAL, 2-hydroxy-1-(2-hydroxy-5methylphenylazo)-4-naphthalenesulfonic acid) at room temperature using added and in situ generated hydrogen peroxide (H2O2), using 1,2-dihydroxybenzene-3,5-disulfonate, disodium salt and monohydrate (Tiron) as the co-catalyst for the in situ generation of H2O2. The percentage of CAL degradation with the in situ generated H2O2 was 91.1 % after 30 min which is lower than that in the added H2O2/Mn(II) system (96.0 %). A one-eighth-lives method was applied to investigate the kinetic parameters in the added H2O2 system, with and without Mn(II), involving phosphate, carbonate, and two biological buffers at different pHs. Percarbonate (HCO4-) was found to be the main reactive species for CAL degradation in the added H2O2 system buffered by carbonate in the absence of Mn(II). Manganese (IV) = O (Mn(IV) = O) and manganese(V) = O (Mn(V) = O) are the main reactive species in the added H2O2/Mn(II) system buffered by carbonate and non-carbonate buffers respectively. pH 8.5 was the optimum pH for CAL degradation when buffered by carbonate, while pH 10.0 is the best pH for the systems not using carbonate buffer. Using a high performance liquid chromatography/electrospray ionisation mass spectrometer (HPLC/ESI-MS), the degradation intermediates of CAL were identified as 1-amino-2-naphthol-4-sulfonate ion, 1-amino-2-naphthol-4-sulfinic ion, 1-amino-2-naphthol, and 1-nitroso-2-naphthol.
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Affiliation(s)
- Ye Cao
- Department of Chemistry, School of Biological and Chemical Sciences, Queen Mary University of London, London, E1 4NS, UK
| | - Tippu S Sheriff
- Department of Chemistry, School of Biological and Chemical Sciences, Queen Mary University of London, London, E1 4NS, UK.
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Mohandass S, Ragavan M, Gnanasekaran D, Lakshmanan U, Dharmar P, Saha SK. Overexpression of Cu/Zn Superoxide Dismutase (Cu/Zn SOD) in Synechococcus elongatus PCC 7942 for Enhanced Azo Dye Removal through Hydrogen Peroxide Accumulation. BIOLOGY 2021; 10:1313. [PMID: 34943228 PMCID: PMC8698522 DOI: 10.3390/biology10121313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 11/27/2021] [Accepted: 12/07/2021] [Indexed: 12/07/2022]
Abstract
Discharge of recalcitrant azo dyes to the environment poses a serious threat to environmental health. However certain microorganisms in nature have developed their survival strategies by degrading these toxic dyes. Cyanobacteria are one such prokaryotic, photosynthetic group of microorganisms that degrade various xenobiotic compounds, due to their capability to produce various reactive oxygen species (ROS), and particularly the hydrogen peroxide (H2O2) when released in their milieu. The accumulation of H2O2 is the result of the dismutation of superoxide radicals by the enzyme superoxide dismutase (SOD). In this study, we have genetically modified the cyanobacterium Synechococcus elongatus PCC 7942 by integrating Cu/Zn SOD gene (sodC) from Synechococcus sp. PCC 9311 to its neutral site through homologous recombination. The overexpression of sodC in the derivative strain was driven using a strong constitutive promoter of the psbA gene. The derivative strain resulted in constitutive production of sodC, which was induced further during dye-treated growth. The genetically engineered Synechococcus elongatus PCC 7942 (MS-sodC+) over-accumulated H2O2 during azo dye treatment with a higher dye removal rate than the wild-type strain (WS-sodC-). Therefore, enhanced H2O2 accumulation through SODs overexpression in cyanobacteria may serve as a valuable bioremediation tool.
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Affiliation(s)
- ShylajaNaciyar Mohandass
- Department of Marine Biotechnology, National Facility for Marine Cyanobacteria (Sponsored by DBT, Govt. of India), School of Marine Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India; (S.M.); (M.R.); (D.G.); (U.L.); (P.D.)
| | - Mangalalakshmi Ragavan
- Department of Marine Biotechnology, National Facility for Marine Cyanobacteria (Sponsored by DBT, Govt. of India), School of Marine Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India; (S.M.); (M.R.); (D.G.); (U.L.); (P.D.)
| | - Dineshbabu Gnanasekaran
- Department of Marine Biotechnology, National Facility for Marine Cyanobacteria (Sponsored by DBT, Govt. of India), School of Marine Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India; (S.M.); (M.R.); (D.G.); (U.L.); (P.D.)
| | - Uma Lakshmanan
- Department of Marine Biotechnology, National Facility for Marine Cyanobacteria (Sponsored by DBT, Govt. of India), School of Marine Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India; (S.M.); (M.R.); (D.G.); (U.L.); (P.D.)
| | - Prabaharan Dharmar
- Department of Marine Biotechnology, National Facility for Marine Cyanobacteria (Sponsored by DBT, Govt. of India), School of Marine Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India; (S.M.); (M.R.); (D.G.); (U.L.); (P.D.)
| | - Sushanta Kumar Saha
- Shannon Applied Biotechnology Centre, Technological University of Shannon, Moylish Park, V94 E8YF Limerick, Ireland
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Zhang BT, Kuang L, Teng Y, Fan M, Ma Y. Application of percarbonate and peroxymonocarbonate in decontamination technologies. J Environ Sci (China) 2021; 105:100-115. [PMID: 34130827 DOI: 10.1016/j.jes.2020.12.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/26/2020] [Accepted: 12/27/2020] [Indexed: 05/21/2023]
Abstract
Sodium percarbonate (SPC) and peroxymonocarbonate (PMC) have been widely used in modified Fenton reactions because of their multiple superior features, such as a wide pH range and environmental friendliness. This broad review is intended to provide the fundamental information, status and progress of SPC and PMC based decontamination technologies according to the peer-reviewed papers in the last two decades. Both SPC and PMC can directly decompose various pollutants. The degradation efficiency will be enhanced and the target contaminants will be expanded after the activation of SPC and PMC. The most commonly used catalysts for SPC activation are iron compounds while cobalt compositions are applied to activate PMC in homogenous and heterogeneous catalytical systems. The generation and participation of hydroxyl, superoxide and/or carbonate radicals are involved in the activated SPC and PMC system. The reductive radicals, such as carbon dioxide and hydroxyethyl radicals, can be generated when formic acid or methanol is added in the Fe(II)/SPC system, which can reduce target contaminants. SPC can also be activated by energy, tetraacetylethylenediamine, ozone and buffered alkaline to generate different reactive radicals for pollutant decomposition. The SPC and activated SPC have been assessed for application in-situ chemical oxidation and sludge dewatering treatment. The challenges and prospects of SPC and PMC based decontamination technologies are also addressed in the last section.
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Affiliation(s)
- Bo-Tao Zhang
- College of Water Sciences, Beijing Normal University, Beijing 100875, China.
| | - Lulu Kuang
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Yanguo Teng
- College of Water Sciences, Beijing Normal University, Beijing 100875, China; Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing 100875, China
| | - Maohong Fan
- Department of Chemical and Petroleum Engineering, University of Wyoming, Laramie, WY 82071, United States.
| | - Yan Ma
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
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Abstract
CO2, HCO3-, and CO32- are present in all aqueous media at pH > 4 if no major effort is made to remove them. Usually the presence of CO2/HCO3-/CO32- is either forgotten or considered only as a buffer or proton transfer catalyst. Results obtained in the last decades point out that carbonates are key participants in a variety of oxidation processes. This was first attributed to the formation of carbonate anion radicals via the reaction OH• + CO32- → CO3•- + OH-. However, recent studies point out that the involvement of carbonates in oxidation processes is more fundamental. Thus, the presence of HCO3-/CO32- changes the mechanisms of Fenton and Fenton-like reactions to yield CO3•- directly even at very low HCO3-/CO32- concentrations. CO3•- is a considerably weaker oxidizing agent than the hydroxyl radical and therefore a considerably more selective oxidizing agent. This requires reconsideration of the sources of oxidative stress in biological systems and might explain the selective damage induced during oxidative stress. The lower oxidation potential of CO3•- probably also explains why not all pollutants are eliminated in many advanced oxidation technologies and requires rethinking of the optimal choice of the technologies applied. The role of percarbonate in Fenton-like processes and in advanced oxidation processes is discussed and has to be re-evaluated. Carbonate as a ligand stabilizes transition metal complexes in uncommon high oxidation states. These high-valent complexes are intermediates in electrochemical water oxidation processes that are of importance in the development of new water splitting technologies. HCO3- and CO32- are also very good hole scavengers in photochemical processes of semiconductors and may thus become key participants in the development of new processes for solar energy conversion. In this Account, an attempt to correlate these observations with the properties of carbonates is made. Clearly, further studies are essential to fully uncover the potential of HCO3-/CO32- in desired oxidation processes.
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Affiliation(s)
- Shanti Gopal Patra
- Department of Chemical Sciences, The Center for Radical Reactions and the Schlesinger Family Center for Compact Accelerators, Radiation Sources and Applications, Ariel University, Ramat HaGolan Street, Ariel 40700, Israel
| | - Amir Mizrahi
- Department of Chemistry, Nuclear Research Centre Negev, Beer-Sheva 84190, Israel
| | - Dan Meyerstein
- Department of Chemical Sciences, The Center for Radical Reactions and the Schlesinger Family Center for Compact Accelerators, Radiation Sources and Applications, Ariel University, Ramat HaGolan Street, Ariel 40700, Israel
- Department of Chemistry, Ben-Gurion University, Beer-Sheva 8410501, Israel
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Li N, Zheng Y, Jiang X, Zhang R, Chen W. Generation of reactive cobalt oxo oxamate radical species for biomimetic oxidation of contaminants. RSC Adv 2017. [DOI: 10.1039/c7ra08317c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Bio-inspired formation of [CoIVO˙]− species: cobalt oxo radical intermediate was directly observed in ESI-MS.
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Affiliation(s)
- Nan Li
- National Engineering Lab for Textile Fiber Materials & Processing Technology (Zhejiang)
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Yun Zheng
- National Engineering Lab for Textile Fiber Materials & Processing Technology (Zhejiang)
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Xuemei Jiang
- National Engineering Lab for Textile Fiber Materials & Processing Technology (Zhejiang)
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Ran Zhang
- National Engineering Lab for Textile Fiber Materials & Processing Technology (Zhejiang)
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Wenxing Chen
- National Engineering Lab for Textile Fiber Materials & Processing Technology (Zhejiang)
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
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