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Fan L, Wang C, Wang J, Zhang X, Li Q, Wang H, Zhao YH. Photolysis and photo-enhanced toxicity of three novel designed neonicotinoids: Impact of novel modifying groups. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:132132. [PMID: 37494794 DOI: 10.1016/j.jhazmat.2023.132132] [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: 04/20/2023] [Revised: 06/29/2023] [Accepted: 07/21/2023] [Indexed: 07/28/2023]
Abstract
Three novel neonicotinoids (cycloxaprid, flupyradifurone and sulfoxaflor) were designed to reduce the biotoxicity for non-target organisms. These neonicotinoids were photolyzed under light radiation, but it was unclear for the photo-enhanced toxicity and influences of the novel modifying group of the three neonicotinoids. The photolysis and photo-enhanced toxicity experiments were performed for the three neonicotinoids, coupled with quantum chemistry calculation, the mechanisms of photolysis, photo-enhanced toxicity and the influences of novel modifying groups were analyzed. The results showed the photolysis pathways were enriched as compared with previous neonicotinoids due to the composition of modifying groups, singlet oxygen and hydroxyl participated the photolysis of cycloxaprid and flupyradifurone. All tested neonicotinoids exhibited photo-enhanced toxicity to Vibrio fischeri. Due to the difference of photolysis mechanism and toxicity to V. fischeri, the photo-enhanced toxicity curves showed diverse variation when histidine, tert-butanol or dissolved organic matters was in presence of the test solutions. The impact of novel modifying groups over photolysis and photo-enhanced toxicity were analyzed based on the comparison with previous neonicotinoids, theoretically predicted UV-Vis spectra and photo-physical/chemical property descriptors. The data showed the composition of novel modifying group increased the light absorption and photo-chemical activities for the three neonicotinoids.
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Affiliation(s)
- Lingyun Fan
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun 130117, China; Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Heilongjiang Province Collaborative Innovation Center of Cold Region Ecological Safety, School of Geographical Sciences, Harbin Normal University, Harbin 150025, China
| | - Chen Wang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun 130117, China
| | - Jia Wang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun 130117, China
| | - Xujia Zhang
- Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Heilongjiang Province Collaborative Innovation Center of Cold Region Ecological Safety, School of Geographical Sciences, Harbin Normal University, Harbin 150025, China
| | - Qi Li
- School of Environmental Science & Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Hanxi Wang
- Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Heilongjiang Province Collaborative Innovation Center of Cold Region Ecological Safety, School of Geographical Sciences, Harbin Normal University, Harbin 150025, China.
| | - Yuan Hui Zhao
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun 130117, China.
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2
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Shen C, Pan X, Wu X, Xu J, Zheng Y, Dong F. Computer-aided toxicity prediction and potential risk assessment of two novel neonicotinoids, paichongding and cycloxaprid, to hydrobionts. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 861:160605. [PMID: 36460103 DOI: 10.1016/j.scitotenv.2022.160605] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/21/2022] [Accepted: 11/26/2022] [Indexed: 06/17/2023]
Abstract
Paichongding (IPP) and cycloxaprid (CYC) have been effectively used as the alternative products of imidacloprid (IMI) against IMI-resistant insects and exhibit a great market potential. However, risk assessment of IPP and CYC for non-target organisms, especially ecological risk assessment for non-target aquatic organisms, is still lacking. Here, we predicted the toxicity and potential risks of IPP, CYC, and their transformation products (TPs) to hydrobionts. The results indicated that IPP and CYC could generate 428 and 113 TPs, respectively, via aerobic microbial transformation. Nearly half of the IPP TPs and nearly 41 % of the CYC TPs exhibited high or moderate toxicity to Daphnia or fish. Moreover, we found that IPP, CYC, and 80 TPs of them posed potential risks to aquatic ecosystems. Almost all harmful TPs contained a 6-chloropyridine ring structure, suggesting that this structure may be associated with the strong toxicity of these TPs to aquatic organisms, and these TPs (IPP-TP2 or CYC-TP2, IPP-TP197 or CYC-TP71, IPP-TP198 or CYC-TP72, and IPP-TP212 or CYC-TP80) may appear in aquatic environments as final products. The risks posed by these TPs to aquatic ecosystems require more attention. This study provides insights into the toxicity and ecological risks of IPP and CYC.
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Affiliation(s)
- Chao Shen
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China; Shandong Engineering Research Center for Environment-Friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, PR China
| | - Xinglu Pan
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Xiaohu Wu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Jun Xu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Yongquan Zheng
- Shandong Engineering Research Center for Environment-Friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, PR China
| | - Fengshou Dong
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China.
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3
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Lutic D, Sescu AM, Siamer S, Harja M, Favier L. Excellent ambient oxidation and mineralization of an emerging water pollutant using Pd-doped TiO 2 photocatalyst and UV-A irradiation. CR CHIM 2022. [DOI: 10.5802/crchim.145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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4
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Huang A, van den Brink NW, Buijse L, Roessink I, van den Brink PJ. The toxicity and toxicokinetics of imidacloprid and a bioactive metabolite to two aquatic arthropod species. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2021; 235:105837. [PMID: 33915471 DOI: 10.1016/j.aquatox.2021.105837] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 03/03/2021] [Accepted: 04/08/2021] [Indexed: 06/12/2023]
Abstract
Previous studies have explored effects of imidacloprid and its metabolites on terrestrial species, such as bees, and indicated the importance of some active metabolites. However, the biotransformation of IMI and the toxicity of its metabolites to aquatic arthropods are largely unknown, especially the mechanisms driving species sensitivity differences and time-cumulative toxicity effects. To assess the potential effects of the metabolization of IMI and the toxicokinetics and toxicity of the metabolite(s) on aquatic arthropods, we first studied the acute toxicity of IMI and relevant metabolites to the mayfly species Cloen dipterum (sensitive to IMI) and the amphipod species Gammarus pulex (less sensitive to IMI). Secondly, toxicokinetic experiments were conducted using both the parent compound and imidacloprid-olefin (IMI-ole), a metabolite assessed as toxic in the acute tests and defined as bioactive. Of the four tested metabolites, only IMI-ole was readily biotransformed from the parent IMI and showed similar toxicity to C. dipterum as IMI. However, C. dipterum was hardly able to eliminate IMI-ole from its body. For G. pulex, IMI-ole was also the only detected metabolite causing toxicity, but the biotransformation of IMI to IMI-ole was slower and lower in G. pulex compared to C. dipterum, and G. pulex eliminated IMI-ole quicker than C. dipterum. Our results on internal kinetics of IMI and IMI-ole, and on biotransformation of IMI indicated that the metabolite IMI-ole was toxic and was rather persistent inside the body tissue of both invertebrate species, especially for C. dipterum. In conclusion, as IMI and IMI-ole have similar toxicity and IMI was replaced rapidly by IMI-ole which in turn was poorly eliminated by C. dipterum, the overall toxicity is a function of dose and time. As a result, no long-term threshold of effects of IMI may exist for C. dipterum as the poor elimination results in an ongoing increase of toxicity over time for mayflies as also found experimentally in previous published papers.
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Affiliation(s)
- Anna Huang
- Aquatic Ecology and Water Quality Management group, Wageningen University, P.O. Box 47, 6700 AA Wageningen, the Netherlands.
| | - Nico W van den Brink
- Sub-department of Toxicology, Wageningen University, P.O. Box 8000, 6700 EA Wageningen, the Netherlands
| | - Laura Buijse
- Wageningen Environmental Research, P.O. Box 47, 6700 AA Wageningen, the Netherlands
| | - Ivo Roessink
- Wageningen Environmental Research, P.O. Box 47, 6700 AA Wageningen, the Netherlands
| | - Paul J van den Brink
- Aquatic Ecology and Water Quality Management group, Wageningen University, P.O. Box 47, 6700 AA Wageningen, the Netherlands; Wageningen Environmental Research, P.O. Box 47, 6700 AA Wageningen, the Netherlands
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5
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A Simple Device for the On-Site Photodegradation of Pesticide Mixes Remnants to Avoid Environmental Point Pollution. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11083593] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The worldwide increase in the number and use of agrochemicals impacts nearby soil and freshwater ecosystems. Beyond the excess in applications and dosages, the inadequate management of remnants and the rinsing water of containers and application equipment worsen this problem, creating point sources of pollution. Advanced oxidation processes (AOPs) such as photocatalytic and photo-oxidation processes have been successfully applied in degrading organic pollutants. We developed a simple prototype to be used at farms for quickly degrading pesticides in water solutions by exploiting a UV–H2O2-mediated AOP. As representative compounds, we selected the insecticide imidacloprid, the herbicide terbuthylazine, and the fungicide azoxystrobin, all in their commercial formulation. The device efficiency was investigated through the disappearance of the parent molecule and the degree of mineralization. The toxicity of the pesticide solutions, before and during the treatment, was assessed by Vibrio fischeri and Pseudokirchneriella subcapitata inhibition assays. The results obtained have demonstrated a cost-effective, viable alternative for detoxifying the pesticide solutions before their disposal into the environment, even though the compounds, or their photoproducts, showed different sensitivities to physicochemical degradation. The bioassays revealed changes in the inhibitory effects on the organisms in agreement with the analytical data.
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6
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Mitsika EE, Christophoridis C, Kouinoglou N, Lazaridis N, Zacharis CK, Fytianos K. Optimized Photo-Fenton degradation of psychoactive pharmaceuticals alprazolam and diazepam using a chemometric approach-Structure and toxicity of transformation products. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123819. [PMID: 33264914 DOI: 10.1016/j.jhazmat.2020.123819] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 08/07/2020] [Accepted: 08/25/2020] [Indexed: 06/12/2023]
Abstract
The objectives of the present study were: a) to evaluate the photocatalytic degradation of two benzodiazepine pharmaceuticals, alprazolam and diazepam, using Photo-Fenton, b) to optimize the experimental parameters through a central composite experimental design, c) to assess their mineralization and toxicity variations and d) to identify the transformation products during the process and to propose transformation pathways. Response Surface Methodology proved to be a useful tool for the optimization of the degradation process as the statistical coefficients (R2 = 0.967 for alprazolam and R2 = 0.929 for diazepam) showed satisfactory values confirming the adequate correlation between the predicted models and experimental values. Two sets of experimental conditions were proposed taking into consideration criteria related to the reaction rate and the minimum use of iron. Toxicity of the system varied with time after the treatment, indicating the gradual production of transformation products which differ in their toxic potential. Fifteen and twenty-three photocatalytic degradation products were identified for ALP and DZP respectively using LC-(ESI)MS/MS. In the case of ALP, the main degradation reactions included, phenyl-group removal and the opening of the 7-membered ring, while for DZP, degradation occurred through hydroxylation, formation of benzophenone and the opening of the 7-membered cyclic group.
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Affiliation(s)
- Elena E Mitsika
- Environmental Pollution Control Laboratory, Chemistry Department, Aristotle University of Thessaloniki, GR-54124, Greece
| | - Christophoros Christophoridis
- Environmental Pollution Control Laboratory, Chemistry Department, Aristotle University of Thessaloniki, GR-54124, Greece
| | - Nikolaos Kouinoglou
- Environmental Pollution Control Laboratory, Chemistry Department, Aristotle University of Thessaloniki, GR-54124, Greece
| | - Nikolaos Lazaridis
- Division of Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-54124, Thessaloniki, Greece
| | - Constantinos K Zacharis
- Laboratory of Pharmaceutical Analysis, Department of Pharmaceutical Technology, School of Pharmacy, Aristotle University of Thessaloniki, GR-54124, Greece
| | - Konstantinos Fytianos
- Environmental Pollution Control Laboratory, Chemistry Department, Aristotle University of Thessaloniki, GR-54124, Greece.
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7
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Satiroff JA, Messer TL, Mittelstet AR, Snow DD. Pesticide occurrence and persistence entering recreational lakes in watersheds of varying land uses. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 273:116399. [PMID: 33477065 DOI: 10.1016/j.envpol.2020.116399] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/25/2020] [Accepted: 12/24/2020] [Indexed: 06/12/2023]
Abstract
Currently little is known of newer pesticide classes and their occurrence and persistence in recreational lakes. Therefore, the objectives of this study were to (1) assess average pesticide concentrations and loadings entering recreational lakes in three mixed land use watersheds throughout the growing season, (2) evaluate pesticide persistence longitudinally within the lakes, and (3) perform an ecotoxicity assessment. Six sampling campaigns were conducted at three lakes from April through October 2018 to measure the occurrence and persistence during pre, middle, and post growing season. Polar organic chemical integrative samplers (POCIS) were placed in streams near lake inlets and monthly samples were collected for analysis of twelve pesticides. Additional monthly grab water samples were taken at each POCIS location and at the midpoint and outlet of each lake. All pesticide samples were analyzed using liquid chromatography/tandem mass spectrometry (LC/MS/MS) and individual pesticide loading rates were determined. Occurrence and persistence of specific pesticides were significantly different between lakes in varying watershed land uses. Specifically, the recreational lake receiving predominately urban runoff had the highest load of pesticides, likely in the form of biocides, entering the waterbody. Concentrations of imidacloprid exceeded acute and chronic invertebrate levels for 11% and 61% of the sampling periods, respectively, with the recreational lake receiving predominately urban runoff having the most occurrences. Findings from this study are critical for preventing and mitigating potential effects of pesticides, specifically applied as biocides in urban landscapes, from entering and persisting in recreational lakes.
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Affiliation(s)
- Jessica A Satiroff
- Biological Systems Engineering Department, East Campus, University of Nebraska-Lincoln, 5223 L.W. Chase Hall P.O. Box 830726, Lincoln, NE, 68583-0726, USA
| | - Tiffany L Messer
- Biosystems and Agricultural Engineering Department, University of Kentucky, 128 Barnhardt Lexington, KY, 40506, USA.
| | - Aaron R Mittelstet
- Biological Systems Engineering Department, East Campus, University of Nebraska-Lincoln, 5223 L.W. Chase Hall P.O. Box 830726, Lincoln, NE, 68583-0726, USA
| | - Daniel D Snow
- School of Natural Resources, East Campus, University of Nebraska-Lincoln, 101 Hardin Hall, Lincoln, NE, 68583-0961, USA; Water Sciences Laboratory, East Campus, University of Nebraska-Lincoln, 1840 N. 37th Street, Lincoln, NE, 68583-0844, USA
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8
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UV-Accelerated Photocatalytic Degradation of Pesticide over Magnetite and Cobalt Ferrite Decorated Graphene Oxide Composite. PLANTS 2020; 10:plants10010006. [PMID: 33374688 PMCID: PMC7822422 DOI: 10.3390/plants10010006] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/10/2020] [Accepted: 12/18/2020] [Indexed: 11/17/2022]
Abstract
Pesticides are one of the main organic pollutants as they are highly toxic and extensively used worldwide. The reclamation of wastewater containing pesticides is of utmost importance. For this purpose, GO-doped metal ferrites (GO-Fe3O4 and GO-CoFe2O4) were prepared and characterized using scanning electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopic techniques. Photocatalytic potentials of catalysts were investigated against acetamiprid’s degradation. A detailed review of the parametric study revealed that efficiency of overall Fenton’s process relies on the combined effects of contributing factors, i.e., pH, initial oxidant concentration, catalyst dose, contact time, and acetamiprid load. ~97 and ~90% degradation of the acetamiprid was achieved by GO-CoFe2O4 and GO-Fe3O4, respectively during the first hour under UV radiations at optimized reaction conditions. At optimized conditions (i.e., pH:3, [H2O2]: 14.5 mM (for Fe3O4, GO-Fe3O4, and GO-CoFe2O4) and 21.75 mM (for CoFe2O4), catalysts: 100 mgL−1, time: 60min) the catalysts exhibited excellent performance, with high degradation rate, magnetic power, easy recovery at the end, and efficient reusability (up to 5 cycles without any considerable loss in catalytic activity). A high magnetic character offers its easy separation from aqueous systems using an external magnet. Moreover, the combined effects of experimental variables were assessed simultaneously and justified using response surface methodology (RSM).
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9
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Subhani Q, Muhammad N, Huang Z, Asif M, Hussain I, Zahid M, Hairong C, Zhu Y, Guo D. Simultaneous determination of acetamiprid and 6-chloronicotinic acid in environmental samples by using ion chromatography hyphenated to online photoinduced fluorescence detector. J Sep Sci 2020; 43:3921-3930. [PMID: 32844548 DOI: 10.1002/jssc.202000635] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 08/13/2020] [Accepted: 08/19/2020] [Indexed: 01/01/2023]
Abstract
This study aims to introduce a simple, sensitive, and cost-effective method for the simultaneous determination of acetamiprid and its main metabolite 6-chloronicotinic acid in environmental samples by using a nonsuppressed ion chromatography hyphenated with an online postcolumn photoinduced fluorescence detection system. The fluorescence detector wavelengths λex /λem = 257/382 nm was set for up to 6.0 min for acetamiprid, while λex /λem = 231/370 nm programmed for 6-chloronicotinic acid for the rest of the analysis time. Both samples were treated by applying miniaturized quick, easy, cheap, effective, rugged, and safe method before the separation of analytes on an IonPac® AS11-HC column by pumping 40 mM NaOH having minuscule content of acetonitrile (5%, v/v) as an eluent. Both intrinsically nonfluorescent analytes were turned-on by online postcolumn photoinduced derivatization, avoiding the need for complex chemical derivatization or addition of a postcolumn extra pump. The developed method was appraised for the analysis of environmental samples, exhibiting excellent linearity (0.050-10 μg/mL) with a correlation coefficient greater than 0.9993 for both analytes. Whereas, obtained limit of detection (0.025-0.0072 μg/mL), recoveries (98.02-116.00%), and inter- and intraday precision (≤3.02 %) were satisfactory for both compounds in environmental samples.
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Affiliation(s)
- Qamar Subhani
- Department of Environmental Engineering, Wuchang University of Technology, Wuhan, P. R. China.,Higher Education Department, Lahore, Punjab, Pakistan.,Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China
| | - Nadeem Muhammad
- Department of Environmental Engineering, Wuchang University of Technology, Wuhan, P. R. China.,Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China
| | - Zhouman Huang
- Department of Environmental Engineering, Wuchang University of Technology, Wuhan, P. R. China
| | - Muhammad Asif
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, P. R. China
| | - Irshad Hussain
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China
| | - Muhammad Zahid
- Department of Environmental, Agricultural and Occupational Health, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Cui Hairong
- Department of Environmental Engineering, Wuchang University of Technology, Wuhan, P. R. China
| | - Yan Zhu
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China
| | - Dandan Guo
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, P. R. China.,Ningbo University, Institution of drug discovery technology, Ningbo, Zhejiang, P. R. China
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10
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Thompson DA, Lehmler HJ, Kolpin DW, Hladik ML, Vargo JD, Schilling KE, LeFevre GH, Peeples TL, Poch MC, LaDuca LE, Cwiertny DM, Field RW. A critical review on the potential impacts of neonicotinoid insecticide use: current knowledge of environmental fate, toxicity, and implications for human health. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2020; 22:1315-1346. [PMID: 32267911 DOI: 10.1039/c9em00586b] [Citation(s) in RCA: 156] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Neonicotinoid insecticides are widely used in both urban and agricultural settings around the world. Historically, neonicotinoid insecticides have been viewed as ideal replacements for more toxic compounds, like organophosphates, due in part to their perceived limited potential to affect the environment and human health. This critical review investigates the environmental fate and toxicity of neonicotinoids and their metabolites and the potential risks associated with exposure. Neonicotinoids are found to be ubiquitous in the environment, drinking water, and food, with low-level exposure commonly documented below acceptable daily intake standards. Available toxicological data from animal studies indicate possible genotoxicity, cytotoxicity, impaired immune function, and reduced growth and reproductive success at low concentrations, while limited data from ecological or cross-sectional epidemiological studies have identified acute and chronic health effects ranging from acute respiratory, cardiovascular, and neurological symptoms to oxidative genetic damage and birth defects. Due to the heavy use of neonicotinoids and potential for cumulative chronic exposure, these insecticides represent novel risks and necessitate further study to fully understand their risks to humans.
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Affiliation(s)
- Darrin A Thompson
- University of Iowa, College of Public Health, Iowa City, IA, USA. and University of Iowa, Center for Health Effects of Environmental Contamination, Iowa City, IA, USA
| | | | - Dana W Kolpin
- U.S. Geological Survey, Central Midwest Water Science Center, Iowa City, IA, USA
| | - Michelle L Hladik
- U.S. Geological Survey, California Water Science Center, Sacramento, CA, USA
| | - John D Vargo
- State Hygienic Laboratory at the University of Iowa, Iowa City, IA, USA
| | | | - Gregory H LeFevre
- University of Iowa, Department of Civil & Environmental Engineering, Iowa City, IA, USA
| | - Tonya L Peeples
- Department of Chemical Engineering, University Park, PA, USA
| | - Matthew C Poch
- University of Iowa, College of Public Health, Iowa City, IA, USA.
| | - Lauren E LaDuca
- University of Iowa, College of Public Health, Iowa City, IA, USA.
| | - David M Cwiertny
- University of Iowa, Center for Health Effects of Environmental Contamination, Iowa City, IA, USA and University of Iowa, Department of Civil & Environmental Engineering, Iowa City, IA, USA
| | - R William Field
- University of Iowa, College of Public Health, Iowa City, IA, USA.
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11
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Kanan S, Moyet MA, Arthur RB, Patterson HH. Recent advances on TiO2-based photocatalysts toward the degradation of pesticides and major organic pollutants from water bodies. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2019. [DOI: 10.1080/01614940.2019.1613323] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Sofian Kanan
- Department of Biology, Chemistry & Environmental Sciences, American University of Sharjah, Sharjah, United Arab Emirates
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12
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Muhammad N, Zhang Y, Li W, Zhao YG, Ali A, Subhani Q, Mahmud T, Liu J, Cui H, Zhu Y. Determination of nitenpyram and 6-chloronicotinic acid in environmental samples by ion chromatography coupled with online photochemically induced fluorescence detector. J Sep Sci 2018; 41:4096-4104. [PMID: 30230241 DOI: 10.1002/jssc.201800612] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 08/30/2018] [Accepted: 09/03/2018] [Indexed: 12/18/2022]
Abstract
A simple, cost-effective, sensitive, and quick method for the determination of nitenpyram and its metabolite 6-chloronicotinic acid in environmental samples was developed by coupling an ion chromatograph with a fluorescence detector and a post-column photochemical reactor. This developed analytical method involved a rapid sample extraction by modified and miniaturized quick, easy, cheap, effective, rugged, and safe method followed by isocratic ion chromatographic separation of nitenpyram and 6-chloronicotinic acid into an IonPac™ AS11-HC column protected by IonPac™ AG11A guard column by running 30 mM NaOH + 10% acetonitrile mobile phase. A homemade post-column photochemical reactor was also integrated with the ion chromatographic system for online transformation of both analytes into their respective highly fluorescent photoproduct in basic media without using an extra pump. The developed method was validated by following SANTE/11945/2015 guidelines on analytical quality control and validation procedures. The method showed a good linear response (r > 0.999), improved limit of detection (0.101-0.132 μg/L), minimum or no matrix effect, excellent recoveries (90.2-100.10%) and relative standard deviations were found to be ≤6.50%.
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Affiliation(s)
- Nadeem Muhammad
- Department of Environmental Engineering, Wuchang University of Technology, Wuhan, P. R. China.,Department of chemistry, Xixi Campus, Zhejiang University, Hangzhou, P. R. China
| | - Yun Zhang
- Department of chemistry, Xixi Campus, Zhejiang University, Hangzhou, P. R. China
| | - Weixia Li
- Department of chemistry, Xixi Campus, Zhejiang University, Hangzhou, P. R. China
| | - Yong-Gang Zhao
- Department of chemistry, Xixi Campus, Zhejiang University, Hangzhou, P. R. China
| | - Amjad Ali
- Department of chemistry, Xixi Campus, Zhejiang University, Hangzhou, P. R. China
| | - Qamar Subhani
- Department of chemistry, Xixi Campus, Zhejiang University, Hangzhou, P. R. China.,Higher Education Department, Punjab, Lahore, Pakistan
| | - Tariq Mahmud
- Institute of Chemistry, University of the Punjab, Lahore, Pakistan
| | - Junwei Liu
- Department of chemistry, Xixi Campus, Zhejiang University, Hangzhou, P. R. China.,Department of Applied Chemistry, Zhengzhou University of Light Industry, Zhengzhou, P. R. China
| | - Hairong Cui
- Department of Environmental Engineering, Wuchang University of Technology, Wuhan, P. R. China
| | - Yan Zhu
- Department of chemistry, Xixi Campus, Zhejiang University, Hangzhou, P. R. China
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13
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Cruz-Alcalde A, Sans C, Esplugas S. Priority pesticides abatement by advanced water technologies: The case of acetamiprid removal by ozonation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 599-600:1454-1461. [PMID: 28531953 DOI: 10.1016/j.scitotenv.2017.05.065] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 05/06/2017] [Accepted: 05/07/2017] [Indexed: 06/07/2023]
Abstract
With the aim of exploring treatment alternatives for priority insecticide acetamiprid (ACMP) abatement, the removal of this compound from water by ozonation was studied for the first time, paying special attention to the kinetic, mechanistic and toxicological aspects of the process. The second order rate constants of reactions between ACMP and both molecular ozone (O3) and hydroxyl radicals (OH) were determined to be 0.25M-1s-1 and 2.1·109M-1s-1, respectively. On the basis of kinetic results, the degradation of ACMP during ozonation could be well-explained by the reactivity of this pesticide with OH. HPLC/MS analysis of the ozonated ACMP showed ACMP-N-desmethyl, 6-chloronicotinic acid, N'cyano-N-methyl acetamidine and N'-cyano acetamidine as the major transformation products (TPs), all of them formed through amine α carbon oxidation in combination with hydrolysis. Microtox bioassays revealed an increase in the toxicity of the medium during ACMP ozonation process, followed by a decrease to relatively low values. These changes could be attributed to the synergistic effects between TPs as well as to the presence of toxic intermediate aldehydes. Even though adopting strategies to further promote ozone decomposition to hydroxyl radicals appears to be essential, ozonation can be an effective treatment process for ACMP removal and associated toxicity abatement.
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Affiliation(s)
- A Cruz-Alcalde
- Department of Chemical Engineering and Analytical Chemistry, Faculty of Chemistry, Universitat de Barcelona, C/Martí i Franqués 1, 08028 Barcelona, Spain.
| | - C Sans
- Department of Chemical Engineering and Analytical Chemistry, Faculty of Chemistry, Universitat de Barcelona, C/Martí i Franqués 1, 08028 Barcelona, Spain
| | - S Esplugas
- Department of Chemical Engineering and Analytical Chemistry, Faculty of Chemistry, Universitat de Barcelona, C/Martí i Franqués 1, 08028 Barcelona, Spain
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14
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Abdel-Ghany MF, Hussein LA, El Azab NF, El-Khatib AH, Linscheid MW. Simultaneous determination of eight neonicotinoid insecticide residues and two primary metabolites in cucumbers and soil by liquid chromatography–tandem mass spectrometry coupled with QuEChERS. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1031:15-28. [DOI: 10.1016/j.jchromb.2016.06.020] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 06/08/2016] [Accepted: 06/13/2016] [Indexed: 11/30/2022]
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15
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Jin D, Xu Q, Yu L, Mao A, Hu X. A novel sensor for the detection of acetamiprid in vegetables based on its photocatalytic degradation compound. Food Chem 2015; 194:959-65. [PMID: 26471640 DOI: 10.1016/j.foodchem.2015.08.118] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 08/14/2015] [Accepted: 08/27/2015] [Indexed: 11/15/2022]
Abstract
An electrochemical method for the indirect determination of acetamiprid was studied, using titanium dioxide photocatalysts coupled with a carbon paste electrode. The cyclic voltammetric results indicated that the photocatalytic degradation compound of acetamiprid had electroactivity in neutral solutions. The amount of acetamiprid was further indirectly determined by differential pulse anodic stripping voltammetric analysis as a sensitive detection technique. The experimental parameters were optimized with regard to the photocatalytic degradation time, pH of buffer solution, accumulation potential and accumulation time. Under optimal conditions, the proposed electrochemical method could detect acetamiprid concentrations ranging from 0.01 to 2.0μM, with a detection limit (3S/N) of 0.2nM. Moreover, the proposed method displays excellent selectivity, good reproducibility, and acceptable operational stability and can be successfully applied to acetamiprid determination in vegetable samples with satisfying results.
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Affiliation(s)
- Dangqin Jin
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China; College of Chemical Engineering, Yangzhou Polytechnic Institute, Yangzhou 225127, PR China
| | - Qin Xu
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China
| | - Liangyun Yu
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China; School of Textiles and Clothing, School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, PR China
| | - Airong Mao
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China; School of Textiles and Clothing, School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051, PR China
| | - Xiaoya Hu
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China.
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16
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Ding F, Peng W. Biological assessment of neonicotinoids imidacloprid and its major metabolites for potentially human health using globular proteins as a model. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 147:24-36. [DOI: 10.1016/j.jphotobiol.2015.03.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Revised: 02/13/2015] [Accepted: 03/05/2015] [Indexed: 12/27/2022]
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17
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Kandil MM, Trigo C, Koskinen WC, Sadowsky MJ. Isolation and Characterization of a Novel Imidacloprid-Degrading Mycobacterium sp. Strain MK6 from an Egyptian Soil. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:4721-7. [PMID: 25932751 DOI: 10.1021/acs.jafc.5b00754] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Thus far, only a small number and types of bacteria with limited ability in degrading imidacloprid have been reported. Also, genes regulating imidacloprid (IMDA) degradation have yet to be discovered. To study this in more detail, an enrichment technique was used to isolate consortia and pure cultures of IMDA-degrading bacteria. Through this approach, we successfully isolated a novel bacterium capable of completely degrading IMDA as a sole nitrogen source. The bacterium was subsequently identified as Mycobacterium sp. strain MK6 by sequence analysis of its 16S rRNA gene (Genbank accession number KR052814 ). BLASTn searches indicated that 16S rRNA gene from Mycobacterium sp. strain MK6 was 99% identical to several Mycobacterium spp. Mycobacterium sp. strain MK6 transformed 99.7% added IMDA (150 μg mL(-1)) in <2 weeks (t1/2 = 1.6 days) to 6-chloronicotinic acid (6-CNA) as its major metabolite. Although the isolated strain and mixed bacterial consortia were able to degrade IMDA, they failed to grow further on 6-CNA, indicating a lack of IMDA mineralization to carbon dioxide. Small amounts of the desnitro-olefin and desnitro-degradates of IMDA were observed during the incubation but did not accumulate in culture medium.
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Affiliation(s)
- Mahrous M Kandil
- †Department of Soil and Water, Faculty of Agriculture, Alexandria University, Alexandria 21545, Egypt
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18
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Liu X, Xu X, Li C, Zhang H, Fu Q, Shao X, Ye Q, Li Z. Degradation of chiral neonicotinoid insecticide cycloxaprid in flooded and anoxic soil. CHEMOSPHERE 2015; 119:334-341. [PMID: 25043960 DOI: 10.1016/j.chemosphere.2014.06.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 06/03/2014] [Accepted: 06/08/2014] [Indexed: 06/03/2023]
Abstract
Cycloxaprid (CYC), with two stereogenic centers from oxabridged ring, is a novel potent neonicotinoid insecticide. The investigation of relevant transformation products (TPs) is critical for the risk evaluation of CYC on environment impact and further regulatory decisions. In this study, stereoselective soil metabolism of CYC enantiomers was investigated using isotope labeling techniques. Liquid scintillation counting with LC-MS/MS was used to identify and quantify the major transformation products (TPs) of CYC enantiomers in four various soils under anoxic and flooded condition. Most of CYC had been transformed in four soils at 5d after treatment. Furthermore, CYC was found converted to a range of transformation products, which exhibited soil-specific dynamic changes. Cleavage of the oxabridged seven-member ring, reductive dechlorination in the chloropyridinyl and cleavage of C-N between the chloropyridinylmethyl and imidazalidine ring are the main transformation pathways of CYC. It is presumed that acidic condition may conduce to form the cleavage product of oxabridged seven-member ring. However, abiotic or biotic stereoselective persistence of TPs in all soils was not observed from the experimental data and may be attributed to the unstable oxabridged ring.
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Affiliation(s)
- Xuanqi Liu
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaoyong Xu
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Chao Li
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Hanxue Zhang
- Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou 310029, China
| | - Qiuguo Fu
- Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou 310029, China
| | - Xusheng Shao
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Qingfu Ye
- Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou 310029, China.
| | - Zhong Li
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.
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19
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Li S, Ma X, Jiang Y, Cao X. Acetamiprid removal in wastewater by the low-temperature plasma using dielectric barrier discharge. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2014; 106:146-153. [PMID: 24840877 DOI: 10.1016/j.ecoenv.2014.04.034] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Revised: 04/22/2014] [Accepted: 04/22/2014] [Indexed: 06/03/2023]
Abstract
Degradation of acetamiprid in wastewater was studied in a dielectric barrier discharge (DBD) reactor. This reactor produces ultraviolet light and reactive species like ozone (O₃) can be used for the treatment of wastewater. We examined the factors that could affect the degradation process, including the discharge power, and the initial concentrations of acetamiprid, and O₃ which is generated by the DBD reactor. We also investigated the effect of adding Na₂B₄O₇ as a radical scavenger to probe the role of hydroxyl radical in the reaction. The results indicated that acetamiprid could be removed from aqueous solution effectively and hydroxyl radicals played an important role during the degradation by the low temperature plasma. The degradation process of acetamiprid fits the first-order kinetics. The degradation efficiency was 83.48 percent at 200 min when the discharge power was 170 W and the initial acetamiprid concentration was 50 mg/L. The removal efficiency of acetamiprid decreased with the increasing concentration of Na₂B₄O₇ because B₄O₇(2-) is an excellent radical scavenger that inhibited the generation of OH during the DBD process. The removal efficiency of acetamiprid improved in the presence of O₃. The main reason was that O₃ can oxidize certain organic compounds directly or indirectly by generating hydroxyl radicals. The degradation products of acetamiprid were characterized qualitatively and quantitatively using high performance liquid chromatography, mass spectrometry and UV-vis spectroscopy.
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Affiliation(s)
- Shanping Li
- School of Environmental Science and Engineering, Shandong University, 27 Shandananlu, Jinan 250100, China; Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Jinan 250100, China.
| | - Xiaolong Ma
- School of Environmental Science and Engineering, Shandong University, 27 Shandananlu, Jinan 250100, China
| | - Yanyan Jiang
- School of Environmental Science and Engineering, Shandong University, 27 Shandananlu, Jinan 250100, China
| | - Xiaohong Cao
- School of Environmental Science and Engineering, Shandong University, 27 Shandananlu, Jinan 250100, China
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20
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Disposition and acute toxicity of imidacloprid in female rats after single exposure. Food Chem Toxicol 2014; 68:190-5. [DOI: 10.1016/j.fct.2014.03.019] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 02/11/2014] [Accepted: 03/15/2014] [Indexed: 11/18/2022]
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21
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Application of liquid chromatography quadrupole time-of-flight mass spectrometry to the identification of acetamiprid transformation products generated under oxidative processes in different water matrices. Anal Bioanal Chem 2014; 406:2549-58. [DOI: 10.1007/s00216-014-7678-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 01/28/2014] [Accepted: 02/03/2014] [Indexed: 12/30/2022]
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22
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Wang X, Mu Z, Liu R, Pu Y, Yin L. Molecular imprinted photonic crystal hydrogels for the rapid and label-free detection of imidacloprid. Food Chem 2013; 141:3947-53. [PMID: 23993570 DOI: 10.1016/j.foodchem.2013.06.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 04/16/2013] [Accepted: 06/06/2013] [Indexed: 10/26/2022]
Abstract
A novel sensor for the rapid and label-free detection of imidacloprid was developed based on the combination of a colloidal crystal templating method and a molecular imprinting technique. The molecular imprinted photonic hydrogel film was prepared with methacrylic acid as monomers, ethylene glycol dimethylacrylate as cross-linkers and imidacloprid as imprinting template molecules. When the colloidal crystal template and the molecularly imprinted template was removed, the resulted MIPH film possessed a highly ordered three-dimensional macroporous structure with nanocavities. The response of the MIPH film to imidacloprid in aqueous solution can be detected through a readable Bragg diffraction red shift. When the concentration of imidacloprid increased from 10(-13) to 10(-7) g/mL, the Bragg diffraction peak shifted from 551 to 589 nm, while there were no obvious peak shifts for thiamethoxam and acetamiprid. This sensor which comprises of no label techniques and expensive instruments has potential application for the detection of trace imidacloprid.
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Affiliation(s)
- Xuan Wang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China
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23
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Ding F, Peng W, Diao JX, Zhang L, Sun Y. Characteristics and essences upon conjugation of imidacloprid with two model proteins. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:4497-4505. [PMID: 23530963 DOI: 10.1021/jf3048065] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Since the introduction of imidacloprid in the early 1990s, it has become one of the most widely applied insecticides, and currently represents about 20% of the global pesticide market (Tomizawa, M.; Casida, J. E. J. Agric. Food Chem 2011, 59, 2883-2886). In the context of this study, our major aim was to comprehensively scrutinize the nature of imidacloprid with two typical model proteins, lysozyme and albumin, by means of circular dichroism (CD), steady-state and time-resolved fluorescence, and molecular modeling at the molecular level. Far-UV CD verified that the spatial structure of both proteins was altered with a distinct reduction of α helix in the presence of imidacloprid suggesting unfolding of the protein (i.e., protein damage). The data of steady-state and time-resolved fluorescence showed that the conjugation of imidacloprid with lysozyme yielded quenching by a static mechanism (KSV = 3.841 × 10(4) M(-1)), while combined static and dynamic properties existed for albumin tryptophan (Trp)-214 fluorescence. Molecular modeling simulations displayed that the imidacloprid binding site was near to the Trp-62 and Trp-63 residues of lysozyme, and it was located at the subdomain IIA (warfarin-azapropazone site) of albumin. Furthermore, the primary forces between protein and imidacloprid are hydrogen bond, hydrophobic, and π-π interactions, but the affinity of lysozyme with imidacloprid is much lower than albumin, probably because the affinity distinctions stem from discrepancy in the three-dimensional structure of the two globular proteins. The results presented here will help to further understand the credible mechanism by which the toxicological implication of neonicotinoid insecticides is palliated by carrier protein.
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Affiliation(s)
- Fei Ding
- Department of Chemistry, China Agricultural University, Beijing 100193, China
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24
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Da Silva ES, Wong-Wah-Chung P, Burrows HD, Sarakha M. Photochemical Degradation of the Plant Growth Regulator 2-(1-Naphthyl) acetamide in Aqueous Solution Upon UV Irradiation. Photochem Photobiol 2013; 89:560-70. [DOI: 10.1111/php.12050] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Accepted: 01/18/2013] [Indexed: 11/27/2022]
Affiliation(s)
| | | | - Hugh D. Burrows
- Department of Chemistry; University of Coimbra; Rua Larga; 3004-535; Coimbra; Portugal
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25
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Zabar R, Komel T, Fabjan J, Kralj MB, Trebše P. Photocatalytic degradation with immobilised TiO(2) of three selected neonicotinoid insecticides: imidacloprid, thiamethoxam and clothianidin. CHEMOSPHERE 2012; 89:293-301. [PMID: 22668598 DOI: 10.1016/j.chemosphere.2012.04.039] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 04/12/2012] [Accepted: 04/14/2012] [Indexed: 05/27/2023]
Abstract
This research focused on photocatalytic degradation of imidacloprid, thiamethoxam and clothianidin employing a tailor-made photoreactor with six polychromatic fluorescent UVA (broad maximum at 355 nm) lamps and immobilised titanium dioxide (TiO(2)) on glass slides. The disappearance was followed by high pressure liquid chromatography (HPLC-DAD) analyses, wherein the efficiency of mineralization was monitored by measurements of total organic carbon (TOC). Within 2h of photocatalysis, all three neonicotinoids were degraded following first order kinetics with rate constants k=0.035 ± 0.001 min(-1) for imidacloprid, k=0.019 ± 0.001 min(-1) for thiamethoxam and k=0.021 ± 0.000 min(-1) for clothianidin. However, the rate of mineralization was low, i.e. 19.1 ± 0.2% for imidacloprid, 14.4 ± 2.9% for thiamethoxam and 14.1 ± 0.4% for clothianidin. This indicates that several transformation products were formed instead. Some of them were observed within HPLC-DAD analyses and structures were proposed according to the liquid chromatography-electro spray ionization tandem mass spectrometry analyses (LC-ESI-MS/MS). The formation of clothianidin, as thiamethoxam transformation product, was reported for the first time.
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Affiliation(s)
- Romina Zabar
- Laboratory for Environmental Research, University of Nova Gorica, Vipavska 13, P.O. Box 301, 5000 Nova Gorica, Slovenia
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26
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Guzsvány V, Rajić L, Jović B, Orčić D, Csanádi J, Lazić S, Abramović B. Spectroscopic monitoring of photocatalytic degradation of the insecticide acetamiprid and its degradation product 6-chloronicotinic acid on TiO₂ catalyst. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2012; 47:1919-1929. [PMID: 22755539 DOI: 10.1080/03601234.2012.676452] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Two spectroscopic methods, (1)H NMR and FTIR, were developed for the monitoring of the photocatalytic degradation of acetamiprid, a widely used pyridine-based neonicotinoid insecticide, in UV-irradiated aqueous suspensions of O(2)/TiO(2). The (1)H NMR method allowed also the identification of the intermediates such as 6-chloronicotinic and formic acids, as well as separate monitoring of the kinetics of degradation of acyclic and aromatic moieties based on the different chemical shifts of the protons belonging to the methyl group of the acyclic and selected proton of the heterocyclic aromatic moiety. The FTIR procedure enabled the monitoring of the kinetics of degradation of the cyano group of the compound. The obtained results are in good agreement with the comparative HPLC-DAD and HPLC-MS/MS measurements, which also enabled the identification of certain intermediates. To get a deeper insight into the complex photocatalytic process, the photocatalytic degradation of 6-chloronicotinic acid, a stable degradation intermediate of acetamiprid, was also investigated by (1)H NMR and HPLC-DAD methods. Based on the obtained data, a tentative reaction mechanism was proposed for the photocatalytic degradation of acetamiprid.
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Affiliation(s)
- Valéria Guzsvány
- Department of Chemistry, Biochemistry and Environmental Protection, University of Novi Sad, Novi Sad, Serbia
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