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Li X, Zhang Y, Wang Y, Zhu L, Liu Y, Wang L. AgIn 5S 8/g-C 3N 4 Composite Photocatalyst Coupled with Low-Temperature Plasma-Enhanced Degradation of Hydroxypropyl-Guar-Simulated Oilfield Wastewater. Molecules 2024; 29:2862. [PMID: 38930926 PMCID: PMC11206768 DOI: 10.3390/molecules29122862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 06/11/2024] [Accepted: 06/14/2024] [Indexed: 06/28/2024] Open
Abstract
The effective treatment and recovery of fracturing wastewater has always been one of the difficult problems to be solved in oilfield wastewater treatment. Accordingly, in this paper, photocatalytic-coupled low-temperature plasma technology was used to degrade the simulated wastewater containing hydroxypropyl guar, the main component of fracturing fluid. Results indicated that hydroxypropyl-guar wastewater could be degraded to a certain extent by either photocatalytic technology or plasma technology; the chemical oxygen demand and viscosity of the treated wastewater under two single-technique optimal conditions were 781 mg·L-1, 0.79 mPa·s-1 and 1296 mg·L-1, 1.01 mPa·s-1, respectively. Furthermore, the effective coupling of AgIn5S8/gC3N4 photocatalysis and dielectric-barrier discharge-low-temperature plasma not only enhanced the degradation degree of hydroxypropyl guar but also improved its degradation efficiency. Under the optimal conditions of coupling treatment, the hydroxypropyl-guar wastewater achieved the effect of a single treatment within 6 min, and the chemical oxygen demand and viscosity of the treated wastewater reduced to below 490 mg·L-1 and 0.65 mPa·s-1, respectively. In the process of coupled treatment, the AgIn5S8/gC3N4 could directly absorb the light and strong electric field generated by the system discharge and play an important role in the photocatalytic degradation, thus effectively improving the energy utilization rate of the discharge system and enhancing the degradation efficiency of hydroxypropyl guar.
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Affiliation(s)
- Xiang Li
- School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China; (Y.Z.); (Y.W.); (L.Z.); (Y.L.); (L.W.)
- Key Laboratory of the Three Gorges Reservoir Regions Eco-Environment, State Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Yuhang Zhang
- School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China; (Y.Z.); (Y.W.); (L.Z.); (Y.L.); (L.W.)
| | - Yiling Wang
- School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China; (Y.Z.); (Y.W.); (L.Z.); (Y.L.); (L.W.)
| | - Li Zhu
- School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China; (Y.Z.); (Y.W.); (L.Z.); (Y.L.); (L.W.)
| | - Yuhang Liu
- School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China; (Y.Z.); (Y.W.); (L.Z.); (Y.L.); (L.W.)
| | - Lingxing Wang
- School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China; (Y.Z.); (Y.W.); (L.Z.); (Y.L.); (L.W.)
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Liu S, Zhou J, Liu D, Liu X, Liu W. Bimetallic Mn-Ce loaded on different zeolite carriers applied in the toluene abatement in air by non-thermal plasma DDBD reactor. ENVIRONMENTAL TECHNOLOGY 2024; 45:1841-1854. [PMID: 36469642 DOI: 10.1080/09593330.2022.2155253] [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: 06/01/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
A sequence of zeolite carriers (Carrier = ZSM-5, Small crystal ZSM-5, MCM-41, SBA-15) were used to support active metals Mn-Ce, which have presented an enormous potential for plasma oxidation of toluene in air. The prepared samples were detected by means of N2 adsorption-desorption, SEM, XPS, H2-TPR, etc. Through the activity evaluation in the Non-thermal Plasma Reactor, we found that the catalysts with different carriers showed distinct degradation activities. The performance of mesoporous supported catalysts was better than that of microporous catalysts, of which MCM-41 performed best. 96.3% of toluene can be decomposed, and 97.3% of degraded toluene converted into final products CO2 completely at the initial concentration of 1000 ppm and SIE of 9 kJ/L. From the results, we can see that the appropriate carrier is conducive to maximizing the efficiency of the active metal, and Mn-Ce/MCM-41 got the best performance in the plasma catalysis for toluene abatement.
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Affiliation(s)
- Su Liu
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, People's Republic of China
| | - Jiabin Zhou
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, People's Republic of China
| | - Dan Liu
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, People's Republic of China
| | - Xianjie Liu
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, People's Republic of China
| | - Wenbo Liu
- School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, People's Republic of China
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Sholokhova AY, Matyushin DD, Grinevich OI, Borovikova SA, Buryak AK. Intelligent Workflow and Software for Non-Target Analysis of Complex Samples Using a Mixture of Toxic Transformation Products of Unsymmetrical Dimethylhydrazine as an Example. Molecules 2023; 28:3409. [PMID: 37110641 PMCID: PMC10143382 DOI: 10.3390/molecules28083409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/05/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
Unsymmetrical dimethylhydrazine (UDMH) is a widely used rocket propellant. Entering the environment or being stored in uncontrolled conditions, UDMH easily forms an enormous variety (at least many dozens) of transformation products. Environmental pollution by UDMH and its transformation products is a major problem in many countries and across the Arctic region. Unfortunately, previous works often use only electron ionization mass spectrometry with a library search, or they consider only the molecular formula to propose the structures of new products. This is quite an unreliable approach. It was demonstrated that a newly proposed artificial intelligence-based workflow allows for the proposal of structures of UDMH transformation products with a greater degree of certainty. The presented free and open-source software with a convenient graphical user interface facilitates the non-target analysis of industrial samples. It has bundled machine learning models for the prediction of retention indices and mass spectra. A critical analysis of whether a combination of several methods of chromatography and mass spectrometry allows us to elucidate the structure of an unknown UDMH transformation product was provided. It was demonstrated that the use of gas chromatographic retention indices for two stationary phases (polar and non-polar) allows for the rejection of false candidates in many cases when only one retention index is not enough. The structures of five previously unknown UDMH transformation products were proposed, and four previously proposed structures were refined.
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Affiliation(s)
- Anastasia Yu. Sholokhova
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31 Leninsky Prospect, GSP-1, 119071 Moscow, Russia
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Zhang X, Guo Z, Sun P, Liu X, Luo Z, Li J, Zhang D, Xu X. Removal of unsymmetrical dimethylhydrazine: A critical review with particular focus on photocatalytic oxidation. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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Hu C, Zhang Y, Zhou Y, Liu ZF, Feng XS. Unsymmetrical dimethylhydrazine and related compounds in the environment: Recent updates on pretreatment, analysis, and removal techniques. JOURNAL OF HAZARDOUS MATERIALS 2022; 432:128708. [PMID: 35344890 DOI: 10.1016/j.jhazmat.2022.128708] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 03/09/2022] [Accepted: 03/12/2022] [Indexed: 06/14/2023]
Abstract
Unsymmetrical dimethylhydrazine (1,1-Dimethylhydrazine, UDMH) has been widely used as aerospace fuel in many countries. The launch of space vehicles can cause the release and leakage of UDMH into the environment, posing serious threats to ecology system and human population. Even worse, the health risks are also pertinent to its numerous classes of transformation products including N-Nitrosodimethylamine (NDMA), because most of them display carcinogenic and mutagenic properties. Recently, there has been an intense ongoing development of simple, fast, green, and effective techniques for determining and removing these hazardous substances. This review summarizes the latest research progress regarding the sources, fates, pretreatment, analysis, and removal techniques of UDMH and related products in the environment. Sample preparation methods mainly include pressurized liquid extraction, liquid-phase microextraction techniques, solid-phase extraction, headspace-solid-phase microextraction, and supercritical fluid extraction. Detection and identification methods mainly include high-performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS), gas chromatography coupled with tandem mass spectrometry (GC-MS/MS), and sensors. Removal methods mainly include advanced oxidation processes, adsorption, biodegradation techniques. The advantages/disadvantages, applications, and trends of the proposed approaches are thoroughly discussed to provide a valuable reference for further studies.
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Affiliation(s)
- Cong Hu
- School of Pharmacy, China Medical University, Shenyang 110122, China; Department of Pharmaceutical Analysis, School of Pharmacy, Fudan University, Shanghai 201203, China.
| | - Yuan Zhang
- School of Pharmacy, China Medical University, Shenyang 110122, China.
| | - Yu Zhou
- Department of Pharmacy, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China.
| | - Zhi-Fei Liu
- School of Pharmacy, China Medical University, Shenyang 110122, China.
| | - Xue-Song Feng
- School of Pharmacy, China Medical University, Shenyang 110122, China.
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Koroleva TV, Semenkov IN, Sharapova AV, Krechetov PP, Lednev SA. Ecological consequences of space rocket accidents in Kazakhstan between 1999 and 2018. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 268:115711. [PMID: 33120344 DOI: 10.1016/j.envpol.2020.115711] [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: 06/09/2020] [Revised: 09/05/2020] [Accepted: 09/21/2020] [Indexed: 06/11/2023]
Abstract
In this paper, we briefly described the ecological consequences of six space rocket accidents launched from the Baikonur Cosmodrome between 1999 and 2018 and focused on an assessment of efficiency of soil remediation following the accidental crash of launch vehicle Proton-M on July 2, 2013, which resulted in the severest environmental impact in the modern Russian space industry. On the day after the accident, the content of carcinogenic unsymmetrical dimethylhydrazine and nitrosodimethylamine, as well as nitrate in soils of the crash site exceeded their maximal permissible concentrations by 8900, 6100 and 85 times, respectively. Mitigation measures included soil detoxication by a solution of 10% H2O2 and 1% iron complexonate, soil excavation and ploughing. Two years later (in April 2015), both unsymmetrical dimethylhydrazine and nitrosodimethylamine concentrations were below 0.05 mg/kg and nitrate concentration did not exceed 3.9 g/kg. As compared to background sites, soils of the crash site had significantly (P-value<0.05) lower values of pH and the content of total organic carbon, basicity from soda and carbonates and higher total nitrogen and soluble salt contents. Soil microbial communities were the most vulnerable component of the disturbed arid ecosystems, as their suppressed condition was indicated by a low biochemical oxygen demand and a very low cellulase activity.
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Affiliation(s)
- T V Koroleva
- Lomonosov Moscow State University (MSU), Faculty of Geography, Leninskie gory GSP-1, 119991, Moscow, Russian Federation.
| | - I N Semenkov
- Lomonosov Moscow State University (MSU), Faculty of Geography, Leninskie gory GSP-1, 119991, Moscow, Russian Federation.
| | - A V Sharapova
- Lomonosov Moscow State University (MSU), Faculty of Geography, Leninskie gory GSP-1, 119991, Moscow, Russian Federation
| | - P P Krechetov
- Lomonosov Moscow State University (MSU), Faculty of Geography, Leninskie gory GSP-1, 119991, Moscow, Russian Federation
| | - S A Lednev
- Lomonosov Moscow State University (MSU), Faculty of Geography, Leninskie gory GSP-1, 119991, Moscow, Russian Federation
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