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Samia B, Della Puppa L, Mattei C, Durand A, Ravier S, Quivet E, Wortham H. Influence of pesticide mixture on their heterogeneous atmospheric degradation by ozone and OH radicals. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 344:123351. [PMID: 38272169 DOI: 10.1016/j.envpol.2024.123351] [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: 10/17/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 01/27/2024]
Abstract
Pesticides in the atmosphere can exist in both gaseous and particulate phases due to their semi-volatile properties. They can undergo degradation when exposed to atmospheric oxidants like ozone and hydroxyl radicals. The majority of studies on the atmospheric reactivity of pesticides study them in combination, without considering potential mixture effects that could induce uncertainties in the results. Therefore, this study aims to address this gap, through laboratory studies using a flow reactor, and by evaluating the degradation kinetics of pendimethalin mixed with folpet, tebuconazole, and S-metolachlor, which were simultaneously adsorbed on hydrophobic silica particles that mimic atmospheric aerosols. The comparison with other mixtures, including pendimethalin, from the literature has shown similar reactivity with ozone and hydroxyl radicals, indicating that the degradation kinetics of pesticides is independent of the mixture. Moreover, the degradation rates of the four pesticides under study indicate that they are not or slightly degraded by ozone, with half-lives ranging from 29 days to over 800 days. In contrast, when exposed to hydroxyl radicals, tebuconazole exhibited the fastest reactivity, with a half-life of 4 days, while pendimethalin had a half-life of 17 days.
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Affiliation(s)
- Boulos Samia
- Aix Marseille Univ, CNRS, LCE, Marseille, France
| | | | - Coraline Mattei
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO, Marseille, France
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2
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Shang Y, Liu Y, Tian J, Liu C, Zhu X, Wang J, Chen D, Tao W. Heterogeneous kinetics of the OH-initiated degradation of fenthion and parathion. J Environ Sci (China) 2023; 133:161-170. [PMID: 37451785 DOI: 10.1016/j.jes.2022.05.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/14/2022] [Accepted: 05/24/2022] [Indexed: 07/18/2023]
Abstract
Fenthion and parathion are two representative kinds of organophosphorus pesticides and widely used in agriculture. They are directly or indirectly released into the atmosphere by spraying or volatilization processes. However, their heterogeneous reactivity toward OH radicals has not yet been well understood. Therefore, this work investigated the heterogeneous kinetics of the OH-initiated degradation of surface-bound fenthion and parathion using a flow reactor. The results showed that OH radicals played an important role in the atmospheric degradation of fenthion and parathion. Their average rate constants were (7.20 ± 0.77) × 10-12 and (10.40 ± 0.60) × 10-12 cm3/(mol· sec) at a relative humidity (RH) and temperature of 35% and 20 °C, respectively, suggesting that they have relatively short lifetimes in the atmosphere. In addition, a negative RH dependence and a positive temperature dependence of the rate constants were observed. The Arrhenius expressions of fenthion and parathion were k2 = (1.34 ± 0.48) × 10-9exp[-(1432.59 ± 105.29)/T] and k2 = (1.96 ± 1.38) × 10-9exp[-(1619.98 ± 222.02)/T], respectively, and their overall activation energy was estimated to be (11.88 ± 0.87) and (13.48 ± 1.83) kJ/mol. The experimental results will update the kinetic data of fenthion and parathion in the atmosphere and be helpful to further understand their atmospheric transportation processes.
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Affiliation(s)
- Yuanhong Shang
- School of Biological and Chemical Engineering, Panzhihua University, Panzhihua 617000, China
| | - Yongchun Liu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Jinfeng Tian
- Medical College, Panzhihua University, Panzhihua 617000, China
| | - Changgeng Liu
- School of Biological and Chemical Engineering, Panzhihua University, Panzhihua 617000, China.
| | - Xuejun Zhu
- School of Biological and Chemical Engineering, Panzhihua University, Panzhihua 617000, China
| | - Jun Wang
- School of Biological and Chemical Engineering, Panzhihua University, Panzhihua 617000, China
| | - Dandan Chen
- School of Biological and Chemical Engineering, Panzhihua University, Panzhihua 617000, China
| | - Wei Tao
- Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, Sichuan University of Science & Engineering, Zigong 643000, China
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Lu Q, Lin N, Cheng X, Yuan T, Zhang Y, Gao Y, Xia Y, Ma Y, Tian Y. Simultaneous determination of 16 urinary metabolites of organophosphate flame retardants and organophosphate pesticides by solid phase extraction and ultra performance liquid chromatography coupled to tandem mass spectrometry. CHEMOSPHERE 2022; 300:134585. [PMID: 35427657 DOI: 10.1016/j.chemosphere.2022.134585] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 04/04/2022] [Accepted: 04/08/2022] [Indexed: 06/14/2023]
Abstract
Organophosphate flame retardants (OPFRs) and organophosphate pesticides (OPPs), pertaining to organophosphate esters, are ubiquitous in environment and have been verified to pose noticeable risks to human health. To evaluate human exposures to OPFRs and OPPs, a fast and sensitive approach based on a solid phase extraction (SPE) followed by the ultra-high-performance liquid chromatography coupled to tandem mass spectrometry (UPLC-MS/MS) detection has been developed for the simultaneous analysis of multiple organophosphorus metabolites in urine. The method allows the identification and quantification of ten metabolites of the most common OPFRs and all six dialkylphosphates (DAPs) of OPPs concerning the population exposure characteristics. The method provided good linearities (R2 = 0.998-0.999), satisfactory method detection limits (MDLs) (0.030-1.129 ng/mL) and only needed a small volume (200 μL) of urine. Recovery rates ranged 73.4-127.1% at three spiking levels (2, 10 and 25 ng/mL urine), with both intra- and inter-day precision less than 14%. The good correlations for DAPs in a cross-validation test with a previous gas chromatography-mass spectrometry (GC-MS) method and a good inter-laboratory agreement for several OPFR metabolites in a standard reference material (SRM 3673) re-enforced the precision and validity of our method. Finally, the established method was successfully applied to analyze 16 organophosphorus metabolites in 35 Chinese children's urine samples. Overall, by validating the method's sensitivity, accuracy, precision, reproducibility, etc., data reliability and robustness were ensured; and the satisfactory pilot application on real urine samples demonstrated feasibility and acceptability of this method for being implemented in large population-based studies.
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Affiliation(s)
- Qi Lu
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Nan Lin
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaomeng Cheng
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Tao Yuan
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yan Zhang
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu Gao
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yankai Xia
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Yuning Ma
- State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China.
| | - Ying Tian
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China; MOE-Shanghai Key Laboratory of Children's Environmental Health, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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Zhang M, Li Y, Mu Q, Feng F, Yu X, Ge J, Zhang Y, Nie J. Effects of chlorpyrifos on the metabolic profiling of Bacillus megaterium strain RRB. CHEMOSPHERE 2022; 297:134189. [PMID: 35248589 DOI: 10.1016/j.chemosphere.2022.134189] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 02/12/2022] [Accepted: 03/01/2022] [Indexed: 06/14/2023]
Abstract
Many microorganisms have been reported to degrade organic pollutants in the environment and plants, however, the specific information about the effect of organic pollutants on the metabolism of microorganisms is poorly investigated. In the present study, the effect of the pesticide chlorpyrifos on the metabolic profiling of Bacillus megaterium strain RRB was investigated using metabolomics. Our data show that chlorpyrifos acting as an energy source was readily concentrated in the strain RRB from the culture medium. During early cultivation, the shift in energy sources from tryptic soy broth to chlorpyrifos may temporarily cause the strain RRB to enter the starvation stage, where some synthesis-related amino acids and intermediates in the pathways of TCA cycle and pyridoxine metabolism were decreased. The increase of nucleotides and lysine may help the strain RRB cope with the starvation stage. During later cultivation, many metabolites including organic acids, nucleosides and sugar phosphates were gradually accumulated, which indicates that chlorpyrifos could be utilized by the stain RRB to generate metabolites bacteria needed. In addition, arginine acting as a nitrogen-storage amino acid was gradually decreased with later cultivation, suggesting that chlorpyrifos could not provide enough nitrogen for bacteria.
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Affiliation(s)
- Mingxia Zhang
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, China; Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, 50 Zhongling Street, Nanjing, 210014, China
| | - Yong Li
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, 50 Zhongling Street, Nanjing, 210014, China; School of Food and Biological Engineering, Jiangsu University, 301 Zhenjiang City University Road, Zhenjiang, 212001, China.
| | - Qi'e Mu
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, China; Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, 50 Zhongling Street, Nanjing, 210014, China
| | - Fayun Feng
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, 50 Zhongling Street, Nanjing, 210014, China
| | - Xiangyang Yu
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, 50 Zhongling Street, Nanjing, 210014, China
| | - Jing Ge
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, 50 Zhongling Street, Nanjing, 210014, China
| | - Yun Zhang
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, China
| | - Jinfang Nie
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, China.
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Huang Y, Zhang W, Pang S, Chen J, Bhatt P, Mishra S, Chen S. Insights into the microbial degradation and catalytic mechanisms of chlorpyrifos. ENVIRONMENTAL RESEARCH 2021; 194:110660. [PMID: 33387540 DOI: 10.1016/j.envres.2020.110660] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 11/20/2020] [Accepted: 12/20/2020] [Indexed: 06/12/2023]
Abstract
Chlorpyrifos is extensively used worldwide as an insecticide to control various insect pests. Long-term and irregular applications of chlorpyrifos have resulted in large-scale soil, groundwater, sediment, and air pollution. Numerous studies have shown that chlorpyrifos and its major intermediate metabolite 3,5,6-trichloropyridinol (TCP) accumulate in non-target organisms through biomagnification and have a strong toxic effect on non-target organisms, including human beings. Bioremediation based on microbial metabolism is considered an eco-friendly and efficient strategy to remove chlorpyrifos residues. To date, a variety of bacterial and fungal species have been isolated and characterized for the biodegradation of chlorpyrifos and TCP. The metabolites and degradation pathways of chlorpyrifos have been investigated. In addition, the chlorpyrifos-degrading enzymes and functional genes in microbes have been reported. Hydrolases can catalyze the first step in ester-bond hydrolysis, and this initial regulatory metabolic reaction plays a key role in the degradation of chlorpyrifos. Previous studies have shown that the active site of hydrolase contains serine residues, which can initiate a catalytic reaction by nucleophilic attack on the P-atom of chlorpyrifos. However, few reviews have focused on the microbial degradation and catalytic mechanisms of chlorpyrifos. Therefore, this review discusses the deep understanding of chlorpyrifos degradation mechanisms with microbial strains, metabolic pathways, catalytic mechanisms, and their genetic basis in bioremediation.
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Affiliation(s)
- Yaohua Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Wenping Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Shimei Pang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Junmin Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China
| | - Pankaj Bhatt
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Sandhya Mishra
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China
| | - Shaohua Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China.
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Lobatto VL, Argüello GA, Buján EI. Direct short-wave photolysis of chlorpyrifos-methyl and chlorpyrifos-methyl oxon in the presence of cyclodextrins. J INCL PHENOM MACRO 2021. [DOI: 10.1007/s10847-021-01046-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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Quintano MM, Rodrigues GLS, Chagas MA, Rocha WR. Revisiting the Tropospheric OH-Initiated Unimolecular Decomposition of Chlorpyrifos and Chlorpyrifos-Methyl: A Theoretical Perspective. J Phys Chem A 2020; 124:4280-4289. [PMID: 32374604 DOI: 10.1021/acs.jpca.0c02006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Based on density functional theory (DFT) electronic structure calculations with dispersion correction, we propose new reaction pathways in which no extra reaction step is necessary to account for the formation of 3,5,6-trichloro-2-pyridynol (TCP) within the process of tropospheric OH-initiated unimolecular decomposition of chlorpyrifos (CLP) and chlorpyrifos-methyl (CLPM). Chlorpyrifos and its analogous compound are among the most used organophosphorus pesticides worldwide, and their unimolecular decomposition in the troposphere is a dominant process of removal in the gas phase. The reaction pathways that we put forward have turned out to be the most exergonic ones among the three possible routes for the attack of the hydroxyl radical to the thiophosphoryl (P═S) bond of both CLP and CLPM. The results showed that the reaction is thermodynamically controlled with the formation of P-bonded adducts via a six-membered ring. The unimolecular decomposition of such reactive intermediates takes place with small energy barriers (less than 3 kcal mol-1) and is distinguished by hydrogen transfer to the nitrogen atom of the aromatic ring, resulting in the formation of 3,5,6-trichloro-2-pyridinol (TCP) and dialkyl phosphate radical (DAP·) product complexes in a single step.
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Affiliation(s)
- Mateus M Quintano
- Laboratory of Computational Studies on Molecular Systems, eCsMolab Department of Chemistry, ICEx, Federal University of Minas Gerais Pampulha, Belo Horizonte 31270-901, MG, Brazil
| | - Gabriel L S Rodrigues
- Laboratory of Computational Studies on Molecular Systems, eCsMolab Department of Chemistry, ICEx, Federal University of Minas Gerais Pampulha, Belo Horizonte 31270-901, MG, Brazil
| | - Marcelo A Chagas
- Laboratory of Computational Studies on Molecular Systems, eCsMolab Department of Chemistry, ICEx, Federal University of Minas Gerais Pampulha, Belo Horizonte 31270-901, MG, Brazil
| | - Willian R Rocha
- Laboratory of Computational Studies on Molecular Systems, eCsMolab Department of Chemistry, ICEx, Federal University of Minas Gerais Pampulha, Belo Horizonte 31270-901, MG, Brazil
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Lobatto VL, Argüello GA, Buján EI. Photolysis of chlorpyrifos‐methyl, chlorpyrifos‐methyl oxon, and 3,5,6‐trichloro‐2‐pyridinol. J PHYS ORG CHEM 2019. [DOI: 10.1002/poc.3957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Virginia L. Lobatto
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), CONICET, Departamento de Química Orgánica, Facultad de Ciencias QuímicasUniversidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Ciudad Universitaria Córdoba Argentina
| | - Gustavo A. Argüello
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), CONICET, Departamento de Fisicoquímica, Facultad de Ciencias QuímicasUniversidad Nacional de Córdoba. Haya de la Torre y Medina Allende, Ciudad Universitaria Córdoba Argentina
| | - Elba I. Buján
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), CONICET, Departamento de Química Orgánica, Facultad de Ciencias QuímicasUniversidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Ciudad Universitaria Córdoba Argentina
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Lee YH, Kim HH, Lee JI, Lee JH, Kang H, Lee JY. Indoor contamination from pesticides used for outdoor insect control. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 625:994-1002. [PMID: 29996466 DOI: 10.1016/j.scitotenv.2018.01.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 01/02/2018] [Accepted: 01/02/2018] [Indexed: 06/08/2023]
Abstract
The present study assessed the indoor level of pesticide residue contamination at a total of 45 dwelling facilities in 5 cities of South Korea from June to November 2014. Pesticide residue contamination was assessed by measuring the frequency and concentration of chlorpyrifos, dichlorvos, and cypermethrin residues in airborne particles, indoor dust, and surface wipes. A preparatory test showed a decreasing tendency in the concentrations of pesticide residues in indoor air over time: from 0.458 to 0.073mg/m3 in dichlorvos for 4weeks and from below 0.050mg/m3 to non-detection in the other substances for 2weeks. Then, pesticide residues were detected indoors 4weeks after outdoor chemical control, implying the infiltration of pesticide particles from outdoors. Airborne particles of dichlorvos were found at a higher level (74.4% of samples at a concentration of 0.053mg/m3), whereas those of the other substances were detected at lower levels (6.1% at 0.002mg/m3 in chlorpyrifos and 9.4% at 0.022mg/m3 in cypermethrin). There was no consistent tendency in the indoor levels of pesticide residue contamination according to dwelling types or indoor height. The indoor levels of dichlorvos residue contamination were lower in industrial districts than in urban or rural districts: 63.9% and 0.013mg/m3 for airborne particles, 13.3% and 0.002μg/g for indoor dust, and 6.7% and 0.001mg/cm2 for surface wipes, respectively. There were no significant differences in the indoor levels of pesticide residue contamination between urban and rural districts. The current study found that most dwelling facilities managed their indoor levels of pesticide residue contamination below permissible exposure limit (PEL, 1.0mg/m3) or threshold limit value (TVL, 0.1mg/m3), whereas some facilities did not. So, we suggest that certain guidelines should be drawn up regarding the indoor environment management.
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Affiliation(s)
- Youn-Hyung Lee
- Department of Horticultural Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Ho-Hyun Kim
- Department of Information, Communication and Technology Convergence, ICT Environment Convergence, Pyeongtaek University, Pyeongtaek 17869, Republic of Korea
| | - Jeong-Il Lee
- Korea Testing & Research Institute, Gwacheon 13810, Republic of Korea
| | - Jeong-Hee Lee
- Korea Testing & Research Institute, Gwacheon 13810, Republic of Korea
| | - Hee Kang
- Department of East-West Medical Science, Graduate School of East-West Medical Science, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Jae-Young Lee
- Institute of Life Science & Resources, Kyung Hee University, Yongin 17104, Republic of Korea.
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The use of activated biochar for development of a sensitive electrochemical sensor for determination of methyl parathion. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.06.020] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Wei W, Mandin C, Ramalho O. Reactivity of Semivolatile Organic Compounds with Hydroxyl Radicals, Nitrate Radicals, and Ozone in Indoor Air. INT J CHEM KINET 2017. [DOI: 10.1002/kin.21093] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Wenjuan Wei
- University of Paris-Est; Scientific and Technical Center for Building (CSTB); Health and Comfort Department; French Indoor Air Quality Observatory (OQAI); 84 Avenue Jean Jaurès; Champs sur Marne 77447 Marne la Vallée Cedex 2 France
| | - Corinne Mandin
- University of Paris-Est; Scientific and Technical Center for Building (CSTB); Health and Comfort Department; French Indoor Air Quality Observatory (OQAI); 84 Avenue Jean Jaurès; Champs sur Marne 77447 Marne la Vallée Cedex 2 France
| | - Olivier Ramalho
- University of Paris-Est; Scientific and Technical Center for Building (CSTB); Health and Comfort Department; French Indoor Air Quality Observatory (OQAI); 84 Avenue Jean Jaurès; Champs sur Marne 77447 Marne la Vallée Cedex 2 France
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Borrás E, Ródenas M, Vera T, Gómez T, Muñoz A. Atmospheric degradation of the organothiophosphate insecticide - Pirimiphos-methyl. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 579:1-9. [PMID: 27881242 DOI: 10.1016/j.scitotenv.2016.11.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 10/28/2016] [Accepted: 11/01/2016] [Indexed: 06/06/2023]
Abstract
The gas phase atmospheric degradation of pirimiphos-methyl (a widely used organophosphate insecticide and acaricide in many European regions) has been investigated at the large outdoor European Photoreactor (EUPHORE) in Valencia, Spain. Its photolysis has been studied under sunlight conditions and its reaction rate constant with OH radicals was measured by the relative rate method. The reaction with ozone was also investigated. The tropospheric degradation of pirimiphos-methyl is controlled mainly by the OH radical reaction. The rate coefficient of the OH reaction with pirimiphos-methyl, k, was measured by a conventional relative rate technique, where aniline was taken as a reference. The resulting value of the OH reaction rate constant with pirimiphos-methyl was k=(1.14±0.2)×10-10cm3molecule-1s-1. The tropospheric lifetime of pirimiphos-methyl with respect to the reaction with OH radicals was estimated to be around 1.6h (283±10) K and atmospheric pressure. Significant aerosol formation was observed in the OH reaction with yields that ranged from 25 to 37%, and with particle diameters below 550nm. This therefore reveals a high human risk due to PM<1, without taking into account the chemical composition of the degradation products. SO2, glyoxal and other oxygenated and nitrogenated compounds were the main degradation products detected.
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Affiliation(s)
- Esther Borrás
- Fundación CEAM, C/Charles R. Darwin, 14, Parque Tecnológico, 46980 Paterna, Valencia, Spain; Atmospheric Pesticide Research Group of Valencia, Valencia, Spain
| | - Milagros Ródenas
- Fundación CEAM, C/Charles R. Darwin, 14, Parque Tecnológico, 46980 Paterna, Valencia, Spain; Atmospheric Pesticide Research Group of Valencia, Valencia, Spain
| | - Teresa Vera
- Fundación CEAM, C/Charles R. Darwin, 14, Parque Tecnológico, 46980 Paterna, Valencia, Spain; Atmospheric Pesticide Research Group of Valencia, Valencia, Spain
| | - Tatiana Gómez
- Fundación CEAM, C/Charles R. Darwin, 14, Parque Tecnológico, 46980 Paterna, Valencia, Spain; Atmospheric Pesticide Research Group of Valencia, Valencia, Spain
| | - Amalia Muñoz
- Fundación CEAM, C/Charles R. Darwin, 14, Parque Tecnológico, 46980 Paterna, Valencia, Spain; Atmospheric Pesticide Research Group of Valencia, Valencia, Spain.
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