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Karimi D, Khajeh M, Oveisi AR, Bohlooli M, Khatibi A, Neyband RS, Luque R. Sulfur-functionalized porphyrin-based covalent organic framework as a metal-free dual-functional catalyst for photodegradation of organophosphorus pesticides under visible-LED-light. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 334:122109. [PMID: 37379874 DOI: 10.1016/j.envpol.2023.122109] [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: 03/05/2023] [Revised: 06/16/2023] [Accepted: 06/24/2023] [Indexed: 06/30/2023]
Abstract
Parathion and diazinon are two significant organophosphorus pesticides broadly used in agriculture. However, these compounds are toxic and can enter into the environment and atmosphere via various processes. Herein, we synthesized and post-functionalized a porphyrinic covalent organic framework (COF), COF-366, with elemental sulfur under solvent-free conditions to give polysulfide-functionalized COF-366, namely PS@COF. The resulting material consisting of porphyrin sensitizer and sulfur nucleophilic sites was used as a dual-functional heterogeneous catalyst for the degradation of these organic compounds using visible-LED-light. Accordingly, the effects of several pertinent parameters such as pH (3-9), the catalyst dosage (5-30 mg), time (up to 80 min), and substrate concentration (10-50 mg L-1) were studied in detail and optimized. The post-modified COF showed excellent photocatalytic activity (>97%) in the detoxification of diazinon and parathion for 60 min at pH 5.5. Kinetic studies indicated a fast degradation rate with pseudo-second order model for 20 mg L-1 of diazinon and parathion. The total organic carbon detection and gas chromatography-mass spectrometry (GC-MS) confirmed the organic intermediates and byproducts formed during the process. PS@COF displayed good recyclability and high reusable efficiency for six cycles without a noteworthy lose in its catalytic activity, owing to its robust structure.
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Affiliation(s)
- Danial Karimi
- Department of Chemistry, University of Zabol, P.O. Box: 98615-538, Zabol, Iran
| | - Mostafa Khajeh
- Department of Chemistry, University of Zabol, P.O. Box: 98615-538, Zabol, Iran.
| | - Ali Reza Oveisi
- Department of Chemistry, University of Zabol, P.O. Box: 98615-538, Zabol, Iran
| | - Mousa Bohlooli
- Department of Cell & Molecular Sciences, Kharazmi University, Tehran, Iran
| | - Ali Khatibi
- Department of Biotechnology, Alzahra University, Tehran, Iran
| | - Razieh Sadat Neyband
- Department of Physical Chemistry, Faculty of Chemistry, Lorestan University, Khorramabad, Iran
| | - Rafael Luque
- Peoples Friendship University of Russia (RUDN University), 6 Miklukho Maklaya str., 117198, Moscow, Russian Federation; Universidad ECOTEC, Km 13.5 Samborondón, Samborondón, EC092302, Ecuador
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Li W, Wang B, Yuan Y, Wang S. Spatiotemporal distribution patterns and ecological risk of multi-pesticide residues in the surface water of a typical agriculture area in China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 870:161872. [PMID: 36716873 DOI: 10.1016/j.scitotenv.2023.161872] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 01/24/2023] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
This study systematically investigated the occurrence, spatiotemporal distribution, and ecological risk of 106 pesticides in the surface water of the Jiaodong Peninsula in China. The results show that 52 pesticides, including 21 insecticides, 10 fungicides, and 21 herbicides, were detectable in the surface water. The concentrations of target pesticides in water samples ranged from 0.42 (tebuconazole in the wet season) to 645.31 ng/L (thiamethoxam in the normal season). The two most polluting and widespread pesticides were quintozene (maximum concentration of 481.46 ng/L and detection rate of 94 %) and atrazine (maximum concentration of 465.73 ng/L and detection rate of 100 %). The total pesticide concentrations in surface water in different seasons revealed the order of dry season > wet season > normal season. Based on aquatic pesticide concentrations, their frequency of occurrence, and effect concentrations, insecticides posed higher risks to aquatic organisms and human health than either fungicides or herbicides. Total pesticide concentrations were significantly positively correlated with suspended particulate matter, dissolved organic carbon, soil pH, normalized difference vegetation index, adjacent cropland area; and were negatively associated with adjacent grassland area. The cropland area largely influences pesticide distribution in the surface water of the Jiaodong Peninsula.
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Affiliation(s)
- Wanting Li
- School of Life Science, Qufu Normal University, Qufu 273165, PR China
| | - Bingbing Wang
- School of Life Science, Qufu Normal University, Qufu 273165, PR China
| | - Yin Yuan
- School of Life Science, Qufu Normal University, Qufu 273165, PR China
| | - Shiliang Wang
- School of Life Science, Qufu Normal University, Qufu 273165, PR China.
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3
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Mena F, Vargas S, Guevara-Mora M, Vargas-Hernández JM, Ruepert C. Biotransformation and oxidative stress responses in fish (Astyanax aeneus) inhabiting a Caribbean estuary contaminated with pesticide residues from agricultural runoff. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:21481-21493. [PMID: 36271999 DOI: 10.1007/s11356-022-23673-7] [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: 12/13/2021] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
The estuarine ecosystem of Madre de Dios Lagoon (MDL), in the Caribbean Coast of Costa Rica, is exposed to contamination with pesticide residues coming from the upstream agricultural areas. Biomarkers can provide a better indication of the fitness of biota in real mixture exposure scenarios than traditional lethal dose toxicity measurements. Here, we measured biomarkers of biotransformation, oxidative stress, and neurotoxicity on Astyanax aeneus, an abundant fish species in MDL. Glutathione S-transferase activity (GST), catalase activity (CAT), lipid peroxidation (LPO), and cholinesterase activity (ChE) were measured in fish collected during seven sampling campaigns, carried out between 2016 and 2018. Pesticide residues were analyzed in surface water samples collected every time fish were sampled. Residues of 25 pesticides, including fungicides, insecticides, and herbicides, were detected. The biomarkers measured in A. aeneus varied along the sampling moments, with biotransformation and oxidative stress signals showing a coupled response throughout the assessment. Furthermore, significant correlations were established between three biomarkers (GST, LPO, and CAT) and individual pesticides, as well as between GST and LPO with groups of pesticides with shared biocide action. Among pesticides, insecticide residues had a major influence on the responses observed in fish. This work demonstrates the chronic exposure to pesticide residues in MDL and how such exposure is related to physiological responses in fish that can affect their health and potentially, the trophic networks. This early warning information should be considered to improve the protection of estuarine ecosystems in the tropics.
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Affiliation(s)
- Freylan Mena
- Instituto Regional de Estudios en Sustancias Tóxicas (IRET), Universidad Nacional, 86-3000, Heredia, Costa Rica.
| | - Seiling Vargas
- Instituto Regional de Estudios en Sustancias Tóxicas (IRET), Universidad Nacional, 86-3000, Heredia, Costa Rica
| | - Meyer Guevara-Mora
- Laboratorio de Entomología (LEUNA), Escuela de Ciencias Biológicas, Universidad Nacional, 86-3000, Heredia, Costa Rica
| | - J Mauro Vargas-Hernández
- Laboratorio de Oceanografía Y Manejo Costero (LAOCOS), Departamento de Física, Universidad Nacional, 86-3000, Heredia, Costa Rica
- Servicio Regional de Información Oceanográfica (SERIO), Departamento de Física, Universidad Nacional, 86-3000, Heredia, Costa Rica
| | - Clemens Ruepert
- Instituto Regional de Estudios en Sustancias Tóxicas (IRET), Universidad Nacional, 86-3000, Heredia, Costa Rica
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Bresnahan CG, McAlexander HR, Woodley CM, Shukla MK. Density functional theory explorations of parathion and paraoxon hydrolysis as a function of the underlying alkaline environment. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2022; 24:2249-2262. [PMID: 36129094 DOI: 10.1039/d2em00296e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Parathion, a once commonly used pesticide known for its potential toxicity, can follow several degradation mechanisms in the environment. Given the species stability and persistence, parathion can be washed into waterways from rain, and therefore an atomistic perspective of the hydrolysis of parathion, and its byproduct paraoxon, is required in order to understand its fate in the environment. Experimental studies have determined that pH plays an important role in the calculated hydrolysis rate constants of parathion degradation. In this work, the degradation of parathion into either paraoxon or 4-nitrophenol, and the degradation of paraoxon to 4-nitrophenol are explored through density functional theory using the M06-2X functional. How the level of basicity affects the reaction mechanism is explored through two different hydroxide/water environments. Our calculations support the anticipated mechanisms determined by previous experimental work that the formation of 4-nitrophenol is the predominant pathway in hydrolysis of parathion.
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Affiliation(s)
- Caitlin G Bresnahan
- Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee, USA
- US Army Corps of Engineers, Engineer Research and Development Center, Environmental Laboratory, Vicksburg 39180, Mississippi, USA.
| | - Harley R McAlexander
- US Army Corps of Engineers, Engineer Research and Development Center, Environmental Laboratory, Vicksburg 39180, Mississippi, USA.
| | - Christa M Woodley
- US Army Corps of Engineers, Engineer Research and Development Center, Environmental Laboratory, Vicksburg 39180, Mississippi, USA.
| | - Manoj K Shukla
- US Army Corps of Engineers, Engineer Research and Development Center, Environmental Laboratory, Vicksburg 39180, Mississippi, USA.
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Hierarchical Nanoflowers of MgFe2O4, Bentonite and B-,P- Co-Doped Graphene Oxide as Adsorbent and Photocatalyst: Optimization of Parameters by Box–Behnken Methodology. Int J Mol Sci 2022; 23:ijms23179678. [PMID: 36077079 PMCID: PMC9455985 DOI: 10.3390/ijms23179678] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/22/2022] [Accepted: 08/22/2022] [Indexed: 11/29/2022] Open
Abstract
In the present study, nanocomposites having hierarchical nanoflowers (HNFs) -like morphology were synthesized by ultra-sonication approach. HNFs were ternary composite of MgFe2O4 and bentonite with boron-, phosphorous- co-doped graphene oxide (BPGO). The HNFs were fully characterized using different analytical tools viz. X-ray photoelectron spectroscopy, scanning electron microscopy, energy dispersion spectroscopy, transmission electron microscopy, X-ray diffraction, vibrating sample magnetometry and Mössbauer analysis. Transmission electron micrographs showed that chiffon-like BPGO nanosheets were wrapped on the MgFe2O4-bentonite surface, resulting in a porous flower-like morphology. The red-shift in XPS binding energies of HNFs as compared to MgFe2O4-bentoniteand BPGO revealed the presence of strong interactions between the two materials. Box–Behnken statistical methodology was employed to optimize adsorptive and photocatalytic parameters using Pb(II) and malathion as model pollutants, respectively. HNFs exhibited excellent adsorption ability for Pb(II) ions, with the Langmuir adsorption capacity of 654 mg g−1 at optimized pH 6.0 and 96% photocatalytic degradation of malathion at pH 9.0 as compared to MgFe2O4-bentonite and BPGO. Results obtained in this study clearly indicate that HNFs are promising nanocomposite for the removal of inorganic and organic contaminants from the aqueous solutions.
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Swasy MI, Brummel BR, Narangoda C, Attia MF, Hawk JM, Alexis F, Whitehead DC. Degradation of pesticides using amine-functionalized cellulose nanocrystals. RSC Adv 2020; 10:44312-44322. [PMID: 35517180 PMCID: PMC9058506 DOI: 10.1039/d0ra08308a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 12/01/2020] [Indexed: 11/21/2022] Open
Abstract
A series of amine-functionalized cellulose nanocrystal materials were successfully synthesized, characterized, and evaluated for the remediation of pesticide contaminants from organic and aqueous media. Their ability to degrade malathion in organic systems has been examined, resulting in up to 100% degradation of the compound into detectable lower molecular weight by-products. A poly(ethylenimine) cellulose nanocrystal (CNC-PEI) material was also capable of degrading aqueous solutions of malathion, deltamethrin, and permethrin with 100%, 95%, and 78% degradation, respectively. Thus, these materials can potentially serve as a new and viable remediation technique based on their ability to effectively degrade various pesticides. The reusability of the CNC-PEI was also explored. The CNC-PEI material maintained its ability to degrade malathion throughout two wash and re-use cycles. A series of amine-functionalized cellulose nanocrystal materials were successfully synthesized, characterized, and evaluated for the remediation of pesticide contaminants from organic and aqueous media.![]()
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Affiliation(s)
| | | | | | | | | | - Frank Alexis
- School of Biological Sciences and Engineering
- Yachay Tech
- San Miguel de Urcuquí
- Ecuador
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7
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Bray JP, Nichols SJ, Keely‐Smith A, Thompson R, Bhattacharyya S, Gupta S, Gupta A, Gao J, Wang X, Kaserzon S, Mueller JF, Chou A, Kefford BJ. Stressor dominance and sensitivity‐dependent antagonism: Disentangling the freshwater effects of an insecticide among co‐occurring agricultural stressors. J Appl Ecol 2019. [DOI: 10.1111/1365-2664.13430] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jon P. Bray
- Faculty of Science and Technology, Institute for Applied Ecology University of Canberra Canberra ACT Australia
| | - Sue J. Nichols
- Faculty of Science and Technology, Institute for Applied Ecology University of Canberra Canberra ACT Australia
| | - Alexandra Keely‐Smith
- Faculty of Science and Technology, Institute for Applied Ecology University of Canberra Canberra ACT Australia
| | - Ross Thompson
- Faculty of Science and Technology, Institute for Applied Ecology University of Canberra Canberra ACT Australia
| | | | | | | | - Jianfa Gao
- QAEHS, University of Queensland Brisbane Queensland Australia
| | - Xianyu Wang
- QAEHS, University of Queensland Brisbane Queensland Australia
| | - Sarit Kaserzon
- QAEHS, University of Queensland Brisbane Queensland Australia
| | | | - Audrey Chou
- Brigham Young University Provo Utah United States of America
| | - Ben J. Kefford
- Faculty of Science and Technology, Institute for Applied Ecology University of Canberra Canberra ACT Australia
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8
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Geed SR, Prasad S, Kureel MK, Singh RS, Rai BN. Biodegradation of wastewater in alternating aerobic-anoxic lab scale pilot plant by Alcaligenes sp. S 3 isolated from agricultural field. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 214:408-415. [PMID: 29547845 DOI: 10.1016/j.jenvman.2018.03.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 02/27/2018] [Accepted: 03/07/2018] [Indexed: 06/08/2023]
Abstract
The isolated microbial Alcaligenes sp. S3 from the agricultural field was used for the biodegradation of synthetic wastewater containing atrazine. This study was conducted in an alternating aerobic-anoxic lab scale pilot plant. The performance of continuously operated pilot plant was evaluated in three different phases with varying atrazine concentration. The best performance of plant was observed in phase-II. The atrazine (200 mg/L) having COD value 1356 mg/L was used with varying flow rate and 90.56% COD removal was obtained at a flow rate of 300 mL/h on 122th day of operation. The effect of process parameter like pH and DO on the performance of the reactor was studied. The GC-MS analysis was investigated, and urea was found the intermediate/metabolites of atrazine biodegradation. The kinetic parameters such as half saturation rate constant (Ks) 106.80 mg/L; maximum specific growth rate (μmax) 0.208 per day and inhibition constant (Ki) 374.91 mg/L were evaluated by Andrew-Haldane model.
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Affiliation(s)
- S R Geed
- Department of Chemical Engineering and Technology, IIT (BHU), Varanasi, 221 005, UP, India; Madhav Institute of Technology and Science, Gwalior, 474 005, MP, India.
| | - Sachin Prasad
- Department of Chemical Engineering and Technology, IIT (BHU), Varanasi, 221 005, UP, India
| | - M K Kureel
- Department of Chemical Engineering and Technology, IIT (BHU), Varanasi, 221 005, UP, India
| | - R S Singh
- Department of Chemical Engineering and Technology, IIT (BHU), Varanasi, 221 005, UP, India
| | - B N Rai
- Department of Chemical Engineering and Technology, IIT (BHU), Varanasi, 221 005, UP, India.
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9
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Geed SR, Shrirame BS, Singh RS, Rai BN. Assessment of pesticides removal using two-stage Integrated Aerobic Treatment Plant (IATP) by Bacillus sp. isolated from agricultural field. BIORESOURCE TECHNOLOGY 2017; 242:45-54. [PMID: 28347623 DOI: 10.1016/j.biortech.2017.03.080] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 03/10/2017] [Accepted: 03/11/2017] [Indexed: 06/06/2023]
Abstract
The biodegradation of synthetic wastewater containing Atrazine, Malathion and Parathion was studied in two stage Integrated Aerobic Treatment Plant using Bacillus sp. (consortia) isolated from agricultural field. The influent stream containing these pesticides with initial COD of 1232mg/L were fed to first reactor and treated effluent of first reactor was fed to second reactor. The maximum removal of pesticides in IATP was found to be greater than 90%. The various process parameters such as pH, DO, Redox potential and BOD5/COD were monitored during the treatment. The degradation of pesticides and its metabolites in the treated effluent were confirmed by GC-MS. Kinetic parameters such as first order rate constant (Kobs), cell yield (YX/C) and decay coefficients (Kdp) were evaluated and found to be 0.00425 per hr, 0.696mg of COD/mg MLSS and 0.0010 per hr respectively. This integrated process was found more effective than physico-chemical treatment of pesticides.
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Affiliation(s)
- S R Geed
- Department of Chemical Engineering and Technology, IIT (BHU), Varanasi 221 005, India
| | - B S Shrirame
- Department of Chemical Engineering and Technology, IIT (BHU), Varanasi 221 005, India
| | - R S Singh
- Department of Chemical Engineering and Technology, IIT (BHU), Varanasi 221 005, India
| | - B N Rai
- Department of Chemical Engineering and Technology, IIT (BHU), Varanasi 221 005, India.
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10
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Geed SR, Kureel MK, Giri BS, Singh RS, Rai BN. Performance evaluation of Malathion biodegradation in batch and continuous packed bed bioreactor (PBBR). BIORESOURCE TECHNOLOGY 2017; 227:56-65. [PMID: 28013137 DOI: 10.1016/j.biortech.2016.12.020] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 12/02/2016] [Accepted: 12/04/2016] [Indexed: 06/06/2023]
Abstract
The aim of this work was to study the biodegradation of Malathion in batch and continuous packed bed (Polyurethane foam; PUF) bioreactor (PBBR). After 10days, 89% Malathion removal was observed in batch PBBR. Continuous PBBR was operated at various flow rates (5-30mL/h) under optimum condition over a period of 75days. Inlet loading rates and elimination capacities were observed in the range of 36-216 and 7.20-145.4mg/L/day with an average removal efficiency of more than 90% under steady state conditions. GC/MS analysis confirms phosphorodithionicacid,O,O,S-trimethylester and diethylmercaptosuccinate as metabolites. Biodegradation of Malathion under inhibitory and non-inhibitory conditions was studied using Monod and Andrew-Haldane models and the kinetic constants were calculated and found to be μmax: 0.271 per day; Ks: 126.3mg/L using Monod and μmax: 0.315 per day; Ks: 151.32mg/L; Ki: 594.75mg/L using Andrew-Haldane models.
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Affiliation(s)
- S R Geed
- Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221 005, India
| | - M K Kureel
- Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221 005, India
| | - B S Giri
- Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221 005, India
| | - R S Singh
- Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221 005, India
| | - B N Rai
- Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221 005, India.
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Kumar P, Kim KH, Deep A. Recent advancements in sensing techniques based on functional materials for organophosphate pesticides. Biosens Bioelectron 2015; 70:469-81. [DOI: 10.1016/j.bios.2015.03.066] [Citation(s) in RCA: 189] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 03/24/2015] [Accepted: 03/25/2015] [Indexed: 12/15/2022]
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Lassalle Y, Nicol É, Genty C, Bourcier S, Bouchonnet S. Structural elucidation and estimation of the acute toxicity of the major UV-visible photoproduct of fludioxonil - detection in both skin and flesh samples of grape. JOURNAL OF MASS SPECTROMETRY : JMS 2015; 50:864-869. [PMID: 26169141 DOI: 10.1002/jms.3598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 03/05/2015] [Accepted: 03/27/2015] [Indexed: 06/04/2023]
Abstract
Ultraviolet (UV)-visible irradiation of fludioxonil was investigated with two photoreactors using either a mercury or xenon vapor lamp. In both cases, it led to the formation of only one photoproduct in significant amount: 2-(2,2-difluorobenzo[d][1,3]dioxol-4-yl)-2-(nitrosomethylene)-4-oxobutanenitrile, which has been characterized using Liquid Chromatography - High Resolution - Tandem Mass Spectrometry (LC-HR-MS/MS) coupling. A photolysis pathway has been proposed to rationalize its formation in degassed water. In vitro bioassays on Vibrio fischeri bacteria showed that UV-vis irradiation of an aqueous solution of fludioxonil significantly increases its toxicity. Because no other by-product was detected in significant amount, the photoproduct mentioned above may be considered mainly responsible for this increase in toxicity. Grape berries treated with a 50 ppm aqueous solution of fludioxonil were submitted to UV-visible irradiation under laboratory conditions. The fungicide and photoproduct were detected in both skin and flesh of berries, even after they have been rinsed with water. The ability of the photoproduct to pass through the fruit skin is comparable with that of fludioxonil. These results are of concern for consumers because they mean that water tap rinsing does not lead to efficient removing of both compounds.
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Affiliation(s)
- Yannick Lassalle
- Laboratoire de Chimie Moléculaire - UMR 9168, École Polytechnique, Palaiseau Cedex, 91128, France
| | - Édith Nicol
- Laboratoire de Chimie Moléculaire - UMR 9168, École Polytechnique, Palaiseau Cedex, 91128, France
| | - Christophe Genty
- Laboratoire de Chimie Moléculaire - UMR 9168, École Polytechnique, Palaiseau Cedex, 91128, France
| | - Sophie Bourcier
- Laboratoire de Chimie Moléculaire - UMR 9168, École Polytechnique, Palaiseau Cedex, 91128, France
| | - Stéphane Bouchonnet
- Laboratoire de Chimie Moléculaire - UMR 9168, École Polytechnique, Palaiseau Cedex, 91128, France
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13
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Janeczko AK, Walters EB, Schuldt SJ, Magnuson ML, Willison SA, Brown LM, Ruiz ON, Felker DL, Racz L. Fate of malathion and a phosphonic acid in activated sludge with varying solids retention times. WATER RESEARCH 2014; 57:127-139. [PMID: 24709533 DOI: 10.1016/j.watres.2014.03.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 03/10/2014] [Accepted: 03/13/2014] [Indexed: 06/03/2023]
Abstract
This study examined the ability of activated sludge (AS) to sorb and biodegrade ethylmethylphosphonic acid (EMPA) and malathion, a degradation product and surrogate, respectively, for an organophosphate chemical warfare agent. Sorption equilibrium isotherm experiments indicate that sorption of EMPA and malathion to AS is negligible. EMPA at a concentration of 1 mg L(-1) degraded by approximately 30% with apparent first-order kinetics, possibly via co-metabolism from nitrification. Heterotrophic bacteria and abiotic mechanisms, however, are largely responsible for malathion degradation also with apparent first-order kinetics. EMPA did not inhibit chemical oxygen demand (COD) oxidation or nitrification activity, although malathion did appear to induce a stress response resulting in inhibition of COD oxidation. The study also included a 30-day experiment in which malathion, at a concentration of 5 mg L(-1), was repeatedly fed to AS in bench-scale sequencing batch reactors (SBRs) operating at different solids retention times (SRTs). Peak malathion concentrations occurred at day 4.5, with the longer SRTs yielding greater peak malathion concentrations. The AS reduced the malathion concentrations to nearly zero by day 10 for all SRTs, even when the malathion concentration in the influent increased to 20.8 mg L(-1). The data suggest a biodegradation pathway for malathion involving an oxygenase. Phylogenetic analyses revealed that all samples had an abundance of Zoogloea, though there was greater bacterial diversity in the SBR with the SRT of 50 days. The SBR with an SRT of 9.5 days had an apparent reduction in the diversity of the bacterial community.
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Affiliation(s)
- Allen K Janeczko
- Air Force Institute of Technology, Department of Systems Engineering and Management, 2950 Hobson Way, Wright-Patterson AFB, OH 45433, USA.
| | - Edward B Walters
- Air Force Institute of Technology, Department of Systems Engineering and Management, 2950 Hobson Way, Wright-Patterson AFB, OH 45433, USA.
| | - Steven J Schuldt
- Air Force Institute of Technology, Department of Systems Engineering and Management, 2950 Hobson Way, Wright-Patterson AFB, OH 45433, USA.
| | - Matthew L Magnuson
- US Environmental Protection Agency, National Homeland Security Research Center, 26 W. Martin Luther King Drive, Mailstop NG-16, Cincinnati, OH 45268, USA.
| | - Stuart A Willison
- US Environmental Protection Agency, National Homeland Security Research Center, 26 W. Martin Luther King Drive, Mailstop NG-16, Cincinnati, OH 45268, USA.
| | - Lisa M Brown
- University of Dayton Research Institute, 300 College Park, Dayton, OH 45469, USA.
| | - Oscar N Ruiz
- Air Force Research Laboratory, Aerospace Systems Directorate, Fuels and Energy Branch, Wright-Patterson AFB, OH 45433, USA.
| | - Daniel L Felker
- Air Force Institute of Technology, Department of Systems Engineering and Management, 2950 Hobson Way, Wright-Patterson AFB, OH 45433, USA.
| | - LeeAnn Racz
- Air Force Institute of Technology, Department of Systems Engineering and Management, 2950 Hobson Way, Wright-Patterson AFB, OH 45433, USA.
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Remucal CK. The role of indirect photochemical degradation in the environmental fate of pesticides: a review. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2014; 16:628-53. [PMID: 24419250 DOI: 10.1039/c3em00549f] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Photochemical degradation contributes to the environmental fate of many pesticides in surface waters. A better understanding of the role of direct and indirect photochemical degradation of pesticides is necessary in order to predict their environmental fate and persistence. This review includes all major pesticide classes and focuses on the importance of dissolved organic matter (DOM) as a sensitizer in indirect photodegradation within aquatic systems. Photochemical studies conducted under environmentally relevant conditions (i.e., aqueous solutions with irradiation wavelengths >290 nm) are included. Comparisons are made between observed photodegradation rates in pure or buffered water and in water containing DOM to assess the extent of pesticide susceptibility to DOM-sensitized indirect photolysis. When data is available, the role of specific reactive species in indirect photodegradation is described. While it is possible to assess the relative importance of direct and indirect photodegradation on a pesticide-by-pesticide basis in many cases, it is often difficult to make generalizations based on compound class. Knowledge gaps and inconstancies in the current body of literature are discussed and areas that require additional research are described.
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Affiliation(s)
- Christina K Remucal
- University of Wisconsin-Madison, Department of Civil and Environmental Engineering, 660 N. Park St., Madison, WI, USA.
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Ramos-Delgado NA, Gracia-Pinilla MA, Maya-Treviño L, Hinojosa-Reyes L, Guzman-Mar JL, Hernández-Ramírez A. Solar photocatalytic activity of TiO2 modified with WO3 on the degradation of an organophosphorus pesticide. JOURNAL OF HAZARDOUS MATERIALS 2013; 263 Pt 1:36-44. [PMID: 23993423 DOI: 10.1016/j.jhazmat.2013.07.058] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 06/24/2013] [Accepted: 07/26/2013] [Indexed: 06/02/2023]
Abstract
In this study, the solar photocatalytic activity (SPA) of WO3/TiO2 photocatalysts synthesized by the sol-gel method with two different percentages of WO3 (2 and 5%wt) was evaluated using malathion as a model contaminant. For comparative purpose bare TiO2 was also prepared by sol-gel process. The powders were characterized by X-ray diffraction (XRD), Raman spectroscopy, diffuse reflectance UV-vis spectroscopy (DRUV-vis), specific surface area by the BET method (SSABET), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM) and scanning transmission electron microscopy with a high annular angle dark field detector (STEM-HAADF). The XRD, Raman, HRTEM and STEM-HAADF analyses indicated that WO3 was present as a monoclinic crystalline phase with nanometric cluster sizes (1.1 ± 0.1 nm for 2% WO3/TiO2 and 1.35 ± 0.3 nm for 5% WO3/TiO2) and uniformly dispersed on the surface of TiO2. The particle size of the materials was 19.4 ± 3.3 nm and 25.6 ± 3 nm for 2% and 5% WO3/TiO2, respectively. The SPA was evaluated on the degradation of commercial malathion pesticide using natural solar light. The 2% WO3/TiO2 photocatalyst exhibited the best photocatalytic activity achieving 76% of total organic carbon (TOC) abatement after 300 min compared to the 5% WO3/TiO2 and bare TiO2 photocatalysts, which achieved 28 and 47% mineralization, respectively. Finally, experiments were performed to assess 2% WO3/TiO2 catalyst activity on repeated uses; after several successive cycles its photocatalytic activity was retained showing long-term stability.
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Affiliation(s)
- N A Ramos-Delgado
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, San Nicolás de los Garza, N.L., Mexico(1)
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Maliyekkal SM, Sreeprasad TS, Krishnan D, Kouser S, Mishra AK, Waghmare UV, Pradeep T. Graphene: a reusable substrate for unprecedented adsorption of pesticides. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:273-83. [PMID: 23001848 DOI: 10.1002/smll.201201125] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Revised: 08/06/2012] [Indexed: 05/21/2023]
Abstract
Unprecedented adsorption of chlorpyrifos (CP), endosulfan (ES), and malathion (ML) onto graphene oxide (GO) and reduced graphene oxide (RGO) from water is reported. The observed adsorption capacities of CP, ES, and ML are as high as ~1200, 1100, and 800 mg g(-1) , respectively. Adsorption is found to be insensitive to pH or background ions. The adsorbent is reusable and can be applied in the field with suitable modifications. A first-principles pseudopotential-based density functional analysis of graphene-water-pesticide interactions showed that the adsorption is mediated through water, while direct interactions between graphene and the pesticides is rather weak or unlikely.
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Affiliation(s)
- Shihabudheen M Maliyekkal
- DST Unit on Nanoscience, Department of Chemistry, Indian Institute of Technology Madras, Chennai, India
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Babu V, Unnikrishnan P, Anu G, Nair SM. Distribution of organophosphorus pesticides in the bed sediments of a backwater system located in an agricultural watershed: influence of seasonal intrusion of seawater. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2011; 60:597-609. [PMID: 20628738 DOI: 10.1007/s00244-010-9569-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2010] [Accepted: 06/21/2010] [Indexed: 05/29/2023]
Abstract
This article focuses on the temporal and spatial distribution of three organophosphorous pesticides-malathion, methyl parathion, and chlorpyrifos-in the sedimentary environment of a backwater ecosystem, Kuttanad backwaters, situated in Kerala, India. Based on salinity distribution, geographic characteristics, and human activities prevailing in the area, the study area was divided into three zones: zone 1 with riverine characteristics, zone 2 with freshwater characteristics during and after the monsoon season and estuarine characteristics during the premonsoon season, and zone 3 with estuarine characteristics. The organophosphorus pesticides in the study area showed the order of enrichment as chlorpyrifos >malathion >methyl parathion. While studying the variations in pesticide concentrations seasonally, higher concentrations were observed during the premonsoon monsoon season, with the concentrations being lower than the detectable level. Sediment characteristics, such as pH, texture, organic carbon, moisture content, etc., had reflective effect on the degradation rates of pesticides. The runoff water from the paddy fields made a larger contribution of pesticide pollution to the study area.
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Affiliation(s)
- V Babu
- Department of Research and Development, Hindustan Insecticides Ltd, Cochin, India
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Lin B, Yu Y, Hu X, Deng D, Zhu L, Wang W. Degradation mechanisms of phoxim in river water. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:312-321. [PMID: 21142082 DOI: 10.1021/jf1029459] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Degradation of phoxim in river water was fully explored in this paper. Effects of pH, temperature, and photoirradiation on the degradation were investigated in detail. The results indicated that the degradation was characterized by a first-order process; UV irradiation and the increase of pH and temperature substantially accelerated the degradation. To fully characterize the degradation mechanism, HPLC-MS/MS was utilized to identify the degradation intermediates. Five intermediates were identified as phoxom, phoxom dimer, O,O,O',O'-tetraethyldithiopyrophosphate, O,O,O'-triethyl-O'-2-hydroxyethyldisulfinylpyrophosphate, and O,O,O'-triethyl-O'-2-hydroxyethyldithiopyrophosphate. On the basis of the results of the intermediate analysis, the degradation pathways of phoxim under the present experimental conditions were proposed. Through conversion of a thiophosphoryl into a phosphoryl group, some phoxim was converted to phoxom, most of which further formed dimer. Another portion of phoxim transformed to O,O,O',O'-tetraethyldithiopyrophosphate via nucleophilic substitution and photolysis. Thereafter, O,O,O',O'-tetraethyldithiopyrophosphate underwent hydroxylation to form O,O,O'-triethyl-O'-2-hydroxyethyldithiopyrophosphate or sulfur oxidation first and then hydroxylation to produce O,O,O'-triethyl-O'-2-hydroxyethyldisulfinylpyrophosphate. The understanding of phoxim's degradation mechanism in this study will be critical to its safety assessment and increase the understanding of the fate of phoxim in environment water.
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Affiliation(s)
- Bixia Lin
- School of Chemistry and Environment, South China Normal University, Guangzhou, People's Republic of China
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ZHAO X, LI Y, ZHANG H, NI Y, CHEN J. Applications of chromatography-mass spectrometry for the analysis of emerging organic pollutants. Se Pu 2010; 28:435-41. [DOI: 10.3724/sp.j.1123.2010.00435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Meng J, Yang B, Zhang Y, Dong X, Shu J. Heterogeneous ozonation of suspended malathion and chlorpyrifos particles. CHEMOSPHERE 2010; 79:394-400. [PMID: 20176393 DOI: 10.1016/j.chemosphere.2010.02.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2009] [Revised: 02/03/2010] [Accepted: 02/03/2010] [Indexed: 05/28/2023]
Abstract
The heterogeneous ozonation of suspended malathion and chlorpyrifos particles are studied in real-time with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer (VUV-ATOFMS). The pesticide particles with the diameter of hundreds of nanometers are generated by the homogeneous nucleation method using azelaic acid as nucleus. The reactions are carried out in an aerosol reaction chamber under ambient pressure (1 atm) and room temperature (298 K), respectively. The time-of-flight mass spectra of the solid-state ozonation products of malathion and chlorpyrifos are obtained. The assignments of the mass spectra reveal that the major ozonation products of malathion particles are s-(1,2-diethoxycarbonyl)ethyl-O,O-dimethylphosphorothioate (malaoxon), 2-mercapto-succinic acid diethylester, 1,2-dicarbethoxyethyl-dimethoxyphosphinyldisulfide and bis(1,2-bis-ethoxycarbonyl-ethyl)disulfide. The experimental results reveal that water vapor can enhance the formation of malaoxon, 2-mercapto-succinic acid diethylester and bis(1,2-bis-ethoxycarbonyl-ethyl)disulfide. In the case of chlorpyrifos, the sole ozonation product observed is 3,5,6-trichloro-2-pyridyl-diethylphosphate (chlorpyrifos oxon). The pathways of heterogeneous ozonation of malathion and chlorpyrifos particles are proposed. The atmospheric lifetimes of malathion and chlorpyrifos particles towards ozone reaction are estimated based on the time-dependent mass spectrometric signals obtained.
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Affiliation(s)
- Junwang Meng
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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Martínez Vidal J, Plaza-Bolaños P, Romero-González R, Garrido Frenich A. Determination of pesticide transformation products: A review of extraction and detection methods. J Chromatogr A 2009; 1216:6767-88. [DOI: 10.1016/j.chroma.2009.08.013] [Citation(s) in RCA: 130] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2009] [Revised: 07/30/2009] [Accepted: 08/07/2009] [Indexed: 11/27/2022]
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Panuwet P, Prapamontol T, Chantara S, Thavornyuthikarn P, Bravo R, Restrepo P, Walker RD, Williams BL, Needham LL, Barr DB. Urinary paranitrophenol, a metabolite of methyl parathion, in Thai farmer and child populations. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2009; 57:623-629. [PMID: 19365648 DOI: 10.1007/s00244-009-9315-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Accepted: 03/09/2009] [Indexed: 05/27/2023]
Abstract
Human exposure to methyl parathion can be assessed by measuring the concentration of its metabolite paranitrophenol (PNP) in urine. Our biologic monitoring study in Chiang Mai, Thailand, measured PNP and dialkylphosphate metabolites (i.e., dimethylphosphate [DMP] and dimethylthiophosphate [DMTP]) of methyl parathion in urine samples collected from 136 farmers (age 20 to 65 years) and 306 school children (age 10 to 15 years) in 2006. Participants came from two topographically different areas: one was colder and mountainous, whereas the other was alluvial with climate fluctuations depending on the monsoon season. Both children and farmers were recruited from each area. Despite methyl parathion's prohibited use in agriculture in 2004, we detected PNP in >90% of all samples analyzed. We applied a nonparametric correlation test (PNP vs. DMP and DMTP) to determine whether the PNP found in most of the samples tested resulted from exposures to methyl parathion. DMP (Spearman's rho = 0.601 [p = 0.001] for farmers and Spearman's rho = 0.263 [p <0.001] for children) and DMTP (Spearman's rho = 0.296 [p = 0.003] for farmers and Spearman's rho = 0.304 [p<0.001] for children) were positively correlated with PNP, suggesting a common source for the three analytes, presumably methyl parathion or related environmental degradates. Although we found a modest correlation between the metabolites, our findings suggest that despite the prohibition, at least a portion (approximately 25% to 60%) of the PNP detected among farmers and children in Thailand may be attributed to exposure from continued methyl parathion use.
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Affiliation(s)
- Parinya Panuwet
- Environmental Science Doctoral Program, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
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