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Gutierrez-Carazo E, Dowle J, Coulon F, Temple T, Ladyman M. Investigating residue dissolution of insensitive high explosives in two sandy soil types: A predictive modelling approach. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166968. [PMID: 37704157 DOI: 10.1016/j.scitotenv.2023.166968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 09/04/2023] [Accepted: 09/08/2023] [Indexed: 09/15/2023]
Abstract
The demand for munitions that are less likely to detonate accidentally has led to an increased use of Insensitive High Explosives (IHE), which contain substances like 2,4-dinitroanisole (DNAN) and 5-nitro-1,2,4-triazol-3-one (NTO). These substances have different properties compared to traditional explosives, and their potential environmental impact is not well understood. When these explosives are used in live-fire training exercises, their residues end up in the soil. It is important to determine how these residues dissolve and enter the soil. This study aimed to experimentally measure the rate at which an IHE formulation dissolves when exposed to rainwater with pH levels of 5.0 and 6.5, and to simulate how these residues dissolve and move through two different soil types. The dissolution rates were determined by conducting experiments in which IHE particles (30-60 mg) were exposed to water with varying pH levels and temperatures. The results showed that the dissolution rate of NTO did not vary with pH, while the dissolution rate of DNAN and RDX decreased with decreasing pH. Specifically, the dissolution rate of DNAN decreased from 18 ± 40 μg min-1 at pH 6.5 to 6 ± 4 μg min-1 at pH 5.0, while the dissolution rate of RDX decreased from 8 ± 4 to 3 ± 1 μg min-1. These findings were used to develop a stochastic model that successfully simulated the concentration of IHE in the leachate from soil columns over time. A sensitivity analysis revealed that while dissolution rates determined the amount of mass entering the soil, they did not significantly regulate the amount of mass that migrated through the soil and leached out of the soil columns.
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Affiliation(s)
- Encina Gutierrez-Carazo
- Cranfield University, Centre for Defence Chemistry, Defence Academy of the United Kingdom, Shrivenham SN6 7LA, UK
| | - James Dowle
- Golder, Sirius Building, The Clocktower, Edinburgh EH12 9LB, UK
| | - Frederic Coulon
- Cranfield University, School of Water, Energy and Environment, Cranfield MK43 0AL, UK
| | - Tracey Temple
- Cranfield University, Centre for Defence Chemistry, Defence Academy of the United Kingdom, Shrivenham SN6 7LA, UK
| | - Melissa Ladyman
- Cranfield University, Centre for Defence Chemistry, Defence Academy of the United Kingdom, Shrivenham SN6 7LA, UK.
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2
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Cegłowski M, Otłowski T, Gierczyk B, Smeets S, Lusina A, Hoogenboom R. Explosives removal and quantification using porous adsorbents based on poly(2-oxazoline)s with various degree of functionalization. CHEMOSPHERE 2023; 340:139807. [PMID: 37574087 DOI: 10.1016/j.chemosphere.2023.139807] [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: 05/16/2023] [Revised: 08/04/2023] [Accepted: 08/11/2023] [Indexed: 08/15/2023]
Abstract
Polymeric porous adsorbents are reported for removal of explosives, namely picric acid, 1,3,5-trinitro-1,3,5-triazinane (RDX), and pentaerythritol tetranitrate (PETN) and their subsequent quantification using direct analysis with ambient plasma mass spectrometry. The adsorbents are obtained by functionalization of short-chain poly(2-oxazoline)s with methyl ester side chains using 4-(aminomethyl)pyridine with a degree of functionalization equal to 0, 5, 10, and 20%. The subsequent step consist of cross-linking using a high internal phase emulsion procedure by further side-chain amidation with diethylenetriamine as crosslinker. Picric acid, RDX, and PETN were chosen as the model compounds as they belong to three different groups of explosives, in particular nitroaromatics, nitroamines, and nitrate esters, respectively. The adsorption isotherms, kinetics, as well as the influence of pH and temperature on the adsorption process was investigated. The porous adsorbents showed the highest maximum adsorption capacity towards picric acid, reaching 334 mg g-1, while PETN (80 mg g-1) and RDX (17.4 mg g-1) were less efficiently adsorbed. Subsequent quantification of the adsorbed explosives is performed by a specially designed ambient mass spectrometry setup equipped with a thermal heater. The obtained limits of detection were found to be 20-times improved compared to direct analysis of analyte solutions. The effectiveness of the proposed analytical setup is confirmed by successful quantification of the explosives in river water samples. The research clearly shows that functional porous adsorbents coupled directly with ambient mass spectrometry can be used for rapid quantification of explosives, which can be, e.g., used for tracking illegal manufacturing sites of these compounds.
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Affiliation(s)
- Michał Cegłowski
- Adam Mickiewicz University in Poznan, Faculty of Chemistry, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland.
| | - Tomasz Otłowski
- Adam Mickiewicz University in Poznan, Faculty of Chemistry, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland
| | - Błażej Gierczyk
- Adam Mickiewicz University in Poznan, Faculty of Chemistry, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland
| | - Sander Smeets
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000, Ghent, Belgium
| | - Aleksandra Lusina
- Adam Mickiewicz University in Poznan, Faculty of Chemistry, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000, Ghent, Belgium.
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3
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Efficient and comparative adsorption of trinitrotoluene on MOF MIL-100(Fe)-derived porous carbon/Fe composite adsorbents with rod-like morphology: behavior, mechanism, and new perspectives. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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4
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Gutierrez-Carazo E, Dowle J, Coulon F, Temple T, Ladyman M. Predicting the transport of 2,4-dinitroanisole (DNAN) and 3-nitro-1,2,4-triazol-5-one (NTO) in sandy and sandy loam soils. Heliyon 2022; 8:e11758. [DOI: 10.1016/j.heliyon.2022.e11758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 11/04/2022] [Accepted: 11/14/2022] [Indexed: 11/23/2022] Open
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5
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Tran D, Weidhaas J. Ion exchange for effective separation of 3-nitro-1,2,4-triazol-5-one (NTO) from wastewater. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129215. [PMID: 35739737 DOI: 10.1016/j.jhazmat.2022.129215] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 05/06/2022] [Accepted: 05/20/2022] [Indexed: 06/15/2023]
Abstract
The explosive 3-nitro-1,2,4-triazol-5-one (NTO) presents a physiochemical challenge for treatment of munitions wastewater. Leveraging NTO's ionic character in neutral pH wastewater allows for expanded treatment options. Four commercial drinking water anion exchange resins specific for NO3- and ClO4- were evaluated for NTO adsorption extent, adsorption kinetics, and regeneration potential. Batch studies demonstrated NTO adsorption to all resins tested (max 690 mg NTO/g resin) and that resins were regenerable with 6% NaCl. Adsorption capacities (88-99%) and desorption efficiencies (80-85%) of NTO from the resins remained stable over three loading cycles. Perchlorate selective resins adsorbed more NTO, with larger desorption efficiencies, than nitrate selective resins. Kinetic experiments demonstrated that equilibrium adsorption between NTO and resins occurs within 120 min of exposure, following the pseudo second-order model (K2 range 9.8 × 10-5 to 15 × 10-5 g resin/mg NTO/min). Intraparticle diffusion modeling suggested that boundary-layer diffusion was the predominant sorption mechanism in NTO adsorption to the resins compared to intraparticle diffusion. In synthetic wastewater mixtures of NTO, 2-4-dinitroanisole (DNAN), nitroguanidine (NQ), and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), only NTO was exchanged to any great extent. This work suggests that perchlorate anion exchange resins may be a viable segregation technology for NTO from munitions wastewater as compared to activated carbon.
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Affiliation(s)
- Dana Tran
- University of Utah, 110 Central Campus Drive, Suite 2000, Salt Lake City, UT 84122, USA
| | - Jennifer Weidhaas
- University of Utah, 110 Central Campus Drive, Suite 2000, Salt Lake City, UT 84122, USA.
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6
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Dehkordi NR, Knapp M, Compton P, Fernandez LA, Alshawabkeh AN, Larese-Casanova P. Degradation of Dissolved RDX, NQ, and DNAN by Cathodic Processes in an Electrochemical Flow-Through Reactor. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 2022; 10:107865. [PMID: 37124117 PMCID: PMC10147348 DOI: 10.1016/j.jece.2022.107865] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Both legacy munitions compounds (e.g., RDX) and new insensitive high explosives (e.g. DNAN, NQ) are being manufactured and utilized concurrently, and there exists a need for wastewater treatment systems that are able to degrade both classes of explosives. Electrochemical systems offer treatment possibilities using inexpensive materials and no chemical additions. Electrochemically induced removal of RDX, NQ, and DNAN were separately studied within an electrochemical plug flow reactor hosting a stainless steel (SS) cathode and downstream Ti/MMO anode. Varying wire mesh cathodes and operating conditions were evaluated in an effort to identify the optimal cathode material, to determine the relative contributions of cathodically-induced removal processes, to shorten time to steady-state removal conditions, and to find practical ranges of operating conditions. Applied current allowed the cathode to support munitions removal mainly by direct reduction at the cathode surface, and the secondary reactions of cathodically-induced alkaline hydrolysis and catalytic hydrogenation by adsorbed H on Ni-containing cathode surfaces might contribute to some munitions degradation. The optimal cathode material was identified as SS grade 316, possibly due to its superior Ni content and lack of corrosion protection coating. Higher current, longer cathode length, and smaller mesh pore sizes resulted in slightly greater removal extents and shorter acclimation times to steady state removal conditions, but there are practical upper limits to these properties. Higher Ni content within SS improved RDX and NQ removal but does not affect DNAN removal. Prolonged use of SS grade 316 showed no debilitating changes in electrical performance or chemical content.
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Affiliation(s)
| | | | | | | | | | - Philip Larese-Casanova
- Corresponding Author: Philip Larese-Casanova, Department of Civil & Environmental Engineering, Northeastern University, 400 Snell Engineering, Boston, Massachusetts, 02115, USA, Phone: +1-617-373-2899; Fax: +1-617-373-4419,
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7
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Wang L, Fang F, Liu J, Beiyuan J, Cao J, Liu S, Ouyang Q, Huang Y, Wang J, Liu Y, Song G, Chen D. U(VI) adsorption by green and facilely modified Ficus microcarpa aerial roots: Behavior and mechanism investigation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 810:151166. [PMID: 34699818 DOI: 10.1016/j.scitotenv.2021.151166] [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: 12/23/2020] [Revised: 10/16/2021] [Accepted: 10/19/2021] [Indexed: 06/13/2023]
Abstract
Uranium (U)-containing wastewater poses serious pressure to human health and environmental safety. The treatment of U-bearing wastewater using green and facilely fabricated materials is considered a promising alternative. Herein, the raw and modified aerial roots of Ficus microcarpa (RARF and MARF, respectively) were prepared and applied to the treatment of synthesized U-containing wastewater. The results showed that the adsorption process was spontaneous and chemically controlled, which was in good accordance with the pseudo-second-order kinetic and the Redlich-Peterson isotherm adsorption model. The adsorption mechanisms were proposed to be the complexation between U(VI) and oxygen/phosphorus-containing functional groups on MARF.
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Affiliation(s)
- Lulu Wang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Fa Fang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Juan Liu
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Jingzi Beiyuan
- School of Environment and Chemical Engineering, Foshan University, Foshan, Guangdong, China
| | - Jielong Cao
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Siyu Liu
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Qien Ouyang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Yeliang Huang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Jin Wang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou 510006, China.
| | - Yanyi Liu
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Gang Song
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou 510006, China.
| | - Diyun Chen
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou 510006, China
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8
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Huang L, Jin S, Bao F, Tang S, Yang J, Peng K, Chen Y. Construction of a physically cross-linked carrageenan/chitosan/calcium ion double-network hydrogel for 3-Nitro-1, 2, 4-triazole-5-one removal. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127510. [PMID: 34879513 DOI: 10.1016/j.jhazmat.2021.127510] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/27/2021] [Accepted: 10/12/2021] [Indexed: 06/13/2023]
Abstract
3-Nitro-1, 2, 4-triazole-5-one (NTO) is an important insensitive explosive. The discharge of NTO wastewater not only pollutes the environment but also causes the economic loss of the valuable explosive. Currently, the NTO wastewater in industrial production is often treated with activated carbon adsorbents. There are no green, efficient and specific adsorption materials for the NTO treatment yet. In the present work, polymer materials suitable for NTO adsorption were screened by molecular dynamics simulation. With the optimized materials, a carrageenan/chitosan/calcium ion physically cross-linked double network hydrogel (KC/CTS/Ca2+ PCDNH) was successfully prepared by the semi-soluble-acidified sol-gel conversion method. The structure and NTO adsorption performance of the hydrogel were investigated by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The NTO adsorption kinetics, isotherm, and thermodynamics were further studied to understand the adsorption behavior and mechanism. In addition, the adsorbed NTO was successfully released and recovered by soaking the hydrogel in NaOH solution. Our work has provided an environmentally friendly and targeted preparation method of NTO adsorbent materials for NTO wastewater treatment.
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Affiliation(s)
- Lun Huang
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China
| | - Shaohua Jin
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China
| | - Fang Bao
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China
| | - Shuxian Tang
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China
| | - Jueying Yang
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China
| | - Kelin Peng
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China
| | - Yu Chen
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China.
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9
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Persico F, Temple T, Ladyman M, Gilroy‐Hirst W, Guiterrez‐Carazo E, Coulon F. Quantitative Environmental Assessment of Explosive Residues from the Detonation of Insensitive High Explosive Filled 155 mm Artillery Shell. PROPELLANTS EXPLOSIVES PYROTECHNICS 2022. [DOI: 10.1002/prep.202100220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Federica Persico
- Centre for Defence Chemistry Cranfield University Defence Academy of the United Kingdom Shrivenham SN6 7LA UK
| | - Tracey Temple
- Centre for Defence Chemistry Cranfield University Defence Academy of the United Kingdom Shrivenham SN6 7LA UK
| | - Melissa Ladyman
- Centre for Defence Chemistry Cranfield University Defence Academy of the United Kingdom Shrivenham SN6 7LA UK
| | - William Gilroy‐Hirst
- Centre for Defence Chemistry Cranfield University Defence Academy of the United Kingdom Shrivenham SN6 7LA UK
| | - Encina Guiterrez‐Carazo
- Centre for Defence Chemistry Cranfield University Defence Academy of the United Kingdom Shrivenham SN6 7LA UK
| | - Frederic Coulon
- School of Water Energy and Environment Cranfield University Cranfield MK43 0AL UK
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10
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Fawcett-Hirst W, Temple TJ, Ladyman MK, Coulon F. A review of treatment methods for insensitive high explosive contaminated wastewater. Heliyon 2021; 7:e07438. [PMID: 34401549 PMCID: PMC8353291 DOI: 10.1016/j.heliyon.2021.e07438] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/01/2021] [Accepted: 06/25/2021] [Indexed: 11/28/2022] Open
Abstract
Insensitive high explosive materials (IHE) such as 3-nitro-1,2,4-triazol-5-one (NTO) and 2,4-dinitroanisole (DNAN) are increasingly being used in formulations of insensitive munitions alongside 1,3,5-trinitroperhydro-1,3,5-triazine (RDX). Load, assembly and packing (LAP) facilities that process munitions produce wastewater contaminated with IHE which must be treated before discharge. Some facilities can produce as much as 90,000 L of contaminated wastewater per day. In this review, methods of wastewater treatment are assessed in terms of their strengths, weaknesses, opportunities and threats for their use in production of IHE munitions including their limitations and how they could be applied to industrial scale LAP facilities. Adsorption is identified as a suitable treatment method, however the high solubility of NTO, up to 16.6 g.L-1 which is 180 times higher that of TNT, has the potential to exceed the adsorptive capacity of carbon adsorption systems. The key properties of the adsorptive materials along the selection of adsorption models are highlighted and recommendations on how the limitations of carbon adsorption systems for IHE wastewater can be overcome are offered, including the modification of carbons to increase adsorptive capacity or reduce costs.
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Affiliation(s)
- William Fawcett-Hirst
- Centre for Defence Chemistry, Cranfield University, Defence Academy of the United Kingdom, Shrivenham, SN6 8LA, UK
| | - Tracey J Temple
- Centre for Defence Chemistry, Cranfield University, Defence Academy of the United Kingdom, Shrivenham, SN6 8LA, UK
| | - Melissa K Ladyman
- Centre for Defence Chemistry, Cranfield University, Defence Academy of the United Kingdom, Shrivenham, SN6 8LA, UK
| | - Frederic Coulon
- School of Water, Energy and Environment, Cranfield University, College Road, Cranfield, MK43 0AL, Bedfordshire, UK
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RoyChowdhury A, Mukherjee P, Panja S, Datta R, Christodoulatos C, Sarkar D. Evidence for Phytoremediation and Phytoexcretion of NTO from Industrial Wastewater by Vetiver Grass. Molecules 2020; 26:molecules26010074. [PMID: 33375266 PMCID: PMC7796298 DOI: 10.3390/molecules26010074] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/17/2020] [Accepted: 12/22/2020] [Indexed: 11/16/2022] Open
Abstract
The use of insensitive munitions such as 3-nitro-1,2,4-triazol-5-one (NTO) is rapidly increasing and is expected to replace conventional munitions in the near future. Various NTO treatment technologies are being developed for the treatment of wastewater from industrial munition facilities. This is the first study to explore the potential phytoremediation of industrial NTO-wastewater using vetiver grass (Chrysopogon zizanioides L.). Here, we present evidence that vetiver can effectively remove NTO from wastewater, and also translocated NTO from root to shoot. NTO was phytotoxic and resulted in a loss of plant biomass and chlorophyll. The metabolomic analysis showed significant differences between treated and control samples, with the upregulation of specific pathways such as glycerophosphate metabolism and amino acid metabolism, providing a glimpse into the stress alleviation strategy of vetiver. One of the mechanisms of NTO stress reduction was the excretion of solid crystals. Scanning electron microscopy (SEM), electrospray ionization mass spectrometry (ESI-MS), and Fourier-transform infrared spectroscopy (FTIR) analysis confirmed the presence of NTO crystals in the plant exudates. Further characterization of the exudates is in progress to ascertain the purity of these crystals, and if vetiver could be used for phytomining NTO from industrial wastewater.
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Affiliation(s)
- Abhishek RoyChowdhury
- Environmental Science and Natural Resources Program, School of Science, Navajo Technical University, Crownpoint, NM 87313, USA;
| | - Pallabi Mukherjee
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA; (P.M.); (S.P.)
| | - Saumik Panja
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA; (P.M.); (S.P.)
| | - Rupali Datta
- Department of Biological Sciences, Michigan Technological University, Houghton, MI 49931, USA;
| | | | - Dibyendu Sarkar
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA; (P.M.); (S.P.)
- Correspondence: ; Tel.: +1-201-2168028
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12
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Isiyaka HA, Jumbri K, Sambudi NS, Zango ZU, Fathihah Abdullah NA, Saad B, Mustapha A. Adsorption of dicamba and MCPA onto MIL-53(Al) metal-organic framework: response surface methodology and artificial neural network model studies. RSC Adv 2020; 10:43213-43224. [PMID: 35514937 PMCID: PMC9058251 DOI: 10.1039/d0ra07969c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 11/02/2020] [Indexed: 12/18/2022] Open
Abstract
An aluminium-based metal–organic framework ((MOF), MIL-53(Al)), was hydrothermally synthesized, characterized and applied for the remediation of the herbicides dicamba (3,6-dichloro-2-methoxy benzoic acid) and 4-chloro-2-methylphenoxyacetic acid (MCPA) in aqueous medium. Response surface methodology (RSM) and artificial neural network (ANN) were used to design, optimize and predict the non-linear relationships between the independent and dependent variables. The shared interaction of the effects of key response parameters on the adsorption capacity were assessed using the central composite design-RSM and ANN optimization models. The optimum adsorption capacities for dicamba and MCPA are 228.5 and 231.9 mg g−1, respectively. The RSM ANOVA results showed significant p-values, with coefficients of determination (R2) = 0.988 and 0.987 and R2 adjusted = 0.974 and 0.976 for dicamba and MCPA, respectively. The ANN prediction model gave R2 = 0.999 and 0.999, R2 adjusted = 0.997 and 0.995 and root mean square errors (RMSEs) of 0.001 and 0.004 for dicamba and MCPA, respectively. In each set of experimental conditions used for the study, the ANN gave better prediction than the RSM, with high accuracy and minimal error. The rapid removal (∼25 min), reusability (5 times) and good agreement between the experimental findings and simulation results suggest the great potential of MIL-53(Al) for the remediation of dicamba and MCPA from water matrices. Rapid equilibration within a short time, high adsorption capacity, optimization, multivariate interaction of adsorption parameters and artificial neural network prediction model.![]()
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Affiliation(s)
- Hamza Ahmad Isiyaka
- Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
| | - Khairulazhar Jumbri
- Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
| | - Nonni Soraya Sambudi
- Chemical Engineering Department, Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
| | - Zakariyya Uba Zango
- Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
| | - Nor Ain Fathihah Abdullah
- Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
| | - Bahruddin Saad
- Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
| | - Adamu Mustapha
- Department of Geography, Faculty of Earth and Environmental Sciences, Kano University of Science and Technology Wudil 3244 Kano State Nigeria
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13
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Wang J, Fang F, Zhou Y, Yin M, Liu J, Wang J, Wu Y, Beiyuan J, Chen D. Facile modification of graphene oxide and its application for the aqueous uranyl ion sequestration: Insights on the mechanism. CHEMOSPHERE 2020; 258:127152. [PMID: 32544809 DOI: 10.1016/j.chemosphere.2020.127152] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 05/17/2020] [Accepted: 05/19/2020] [Indexed: 06/11/2023]
Abstract
Graphene oxide (GO) has been proved with favorable affinity to U(VI), while some drawbacks such as poor dispersity and low adsorption performance limit its application. Herein, cetyltrimethylammonium bromide (CTAB) modified graphene oxide (MGO) composites were successfully fabricated, characterized and compared with graphene oxide (GO) in the sequestration of U(VI) in aqueous solutions. The results showed that maximum adsorption rate of MGO (99.21%) was obviously higher than that of GO (66.51%) under the same initial condition. Simultaneous introduction of C-H and NO coupled with the enhanced dispersity of GO after modification were mainly responsible for the updated performance verified with multiple characterization techniques. Based on the results of kinetics and isotherms investigations, the experimental data were best described by Pseudo-first-order kinetic model and Redlich-Peterson isotherm model. The results of ΔH, ΔS and ΔG show that adsorptive behaviors of uranyl ion on MGO are endothermic and spontaneous. The study provides a feasible alternative to the chemical modification of GO and enhancing the performance towards uranyl ion removal from solution.
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Affiliation(s)
- Jin Wang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou, 510006, China
| | - Fa Fang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Yuchen Zhou
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Meiling Yin
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Juan Liu
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China.
| | - Jinwen Wang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Yang Wu
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Jingzi Beiyuan
- School of Environment and Chemical Engineering, Foshan University, Foshan 528000, Guangdong, China.
| | - Diyun Chen
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou, 510006, China
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