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Actinobacteria isolated from wastewater treatment plants located in the east-north of Algeria able to degrade pesticides. World J Microbiol Biotechnol 2022; 38:105. [PMID: 35501608 DOI: 10.1007/s11274-022-03282-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 04/08/2022] [Indexed: 10/18/2022]
Abstract
The pollution of water resources by pesticides poses serious problems for public health and the environment. In this study, Actinobacteria strains were isolated from three wastewater treatment plants (WWTPs) and were screened for their ability to degrade 17 pesticide compounds. Preliminary screening of 13 of the isolates of Actinobacteria allowed the selection of 12 strains with potential for the degradation of nine different pesticides as sole carbon source, including aliette, for which there are no previous reports of biodegradation. Evaluation of the bacterial growth and degradation kinetics of the pesticides 2,4-dichlorophenol (2,4-DCP) and thiamethoxam (tiam) by selected Actinobacteria strains was performed in liquid media. Strains Streptomyces sp. ML and Streptomyces sp. OV were able to degrade 45% of 2,4-DCP (50 mg/l) as the sole carbon source in 30 days and 84% of thiamethoxam (35 mg/l) in the presence of 10 mM of glucose in 18 days. The biodegradation of thiamethoxam by Actinobacteria strains was reported for the first time in this study. These strains are promising for use in bioremediation of ecosystems polluted by this type of pesticides.
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Particularities of Fungicides and Factors Affecting Their Fate and Removal Efficacy: A Review. SUSTAINABILITY 2022. [DOI: 10.3390/su14074056] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Systemic fungicide use has increased over the last decades, despite the susceptibility of resistance development and the side effects to human health and the environment. Although herbicides and insecticides are detected more frequently in environmental samples, there are many fungicides that have the ability to enter water bodies due to their physicochemical properties and their increasing use. Key factors affecting fungicide fate in the environment have been discussed, including the non-target effects of fungicides. For instance, fungicides are associated with the steep decline in bumblebee populations. Secondary actions of certain fungicides on plants have also been reported recently. In addition, the use of alternative eco-friendly disease management approaches has been described. Constructed Wetlands (CWs) comprise an environmentally friendly, low cost, and efficient fungicide remediation technique. Fungicide removal within CWs is dependent on plant uptake and metabolism, absorption in porous media and soil, hydrolysis, photodegradation, and biodegradation. Factors related to the efficacy of CWs on the removal of fungicides, such as the type of CW, plant species, and the physicochemical parameters of fungicides, are also discussed in this paper. There are low-environmental-risk fungicides, phytohormones and other compounds, which could improve the removal performance of CW vegetation. In addition, specific parameters such as the multiple modes of action of fungicides, side effects on substrate microbial communities and endophytes, and plant physiological response were also studied. Prospects and challenges for future research are suggested under the prism of reducing the risk related to fungicides and enhancing CW performance.
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Determination of Fosetyl-Aluminum in Wheat Flour with Extract-Dilute-Shoot Procedure and Hydrophilic Interaction Liquid Chromatography Tandem Mass Spectrometry. SEPARATIONS 2021. [DOI: 10.3390/separations8110197] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Fosetyl-aluminum is a widely used ionic fungicide. This pesticide is not amenable to the common multi-residue sample preparation methods. Herein, this paper describes a novel method for the simple and sensitive determination of fosetyl-aluminum residue in wheat flour. The sample preparation method involved extraction with water under ultrasonication and subsequent dilution with six-fold acetonitrile. The fosetyl-aluminum concentration was determined by hydrophilic interaction liquid chromatography tandem mass spectrometry. The limit of detection and quantification were only 5 and 10 ng/g, respectively, which meet the requirement of the current European legislation. Matrix-matched linearity (r2 = 0.9999) was established in the range of 10–2000 ng/g. Satisfactory recoveries were achieved in the range of 95.6% to 105.2% for three levels of spiked samples (10, 50, and 100 ng/g). Finally, the method was applied to analyzing 75 wheat flour samples produced in four provinces in China. Two samples were positive with concentrations over the limit of detection. This is the first method focusing on fosetyl-aluminum determination in wheat flour with an extract-dilute-shoot strategy and is very promising for the routine quality control of fosetyl-aluminum in similar cereal matrices.
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Simonetti G, Castellani F, Di Filippo P, Riccardi C, Pomata D, Risoluti R, Buiarelli F, Sonego E. Determination of Mancozeb, a Pesticide Used Worldwide in Agriculture: Comparison among GC, LC, and CE. CURR ANAL CHEM 2020. [DOI: 10.2174/1389203721666200426234827] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
The determination of mancozeb, a fungicide extensively used in agriculture,
is a challenge, due to the nature of the compound, a manganese and zinc complex of ethylenebis dithiocarbamate
and because of the general instability of the dithiocarbamates.
Methods:
Mancozeb was analyzed in a GC-EI-MS system after derivatization by CE-UV with detection
at 280 nm and in LC-ESI-MS-MS in MRM mode.
Results:
A comparative study of the performance of three different techniques for the detection of
mancozeb was explored, highlighting the advantages and drawbacks of them. The limits of detection
and quantification of the techniques were determined; the repeatability was assessed, showing values
of relative standard deviation. Gas chromatography, although very sensitive, was not reproducible
enough due to fast degradation of the derivatization product, whereas capillary electrophoresis-UV
showed problems in run-to-run reproducibility which had the worst limit of detection. LC coupled
with tandem mass spectrometry was the most reliable and precise technique and was able to determine
the main degradation product of Mancozeb, at the same time. The proposed LC procedure was
verified by applying it to a commercial formulation, a fungicide of known concentration, and to Italian
white grapes treated with the formulation sprayed during cultivation.
Conclusion:
Thanks to the simplified sample handling, the proposed method resulted to be simple,
fast, green, economic, and suitable for residue analysis in grapes and other fruits. Finally, the method
was compared with other similar investigations.
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Affiliation(s)
- Giulia Simonetti
- Department of Chemistry, University of Rome “La Sapienza”, P.le Aldo Moro, 5-00185 Rome, Italy
| | - Federica Castellani
- Department of Chemistry, University of Rome “La Sapienza”, P.le Aldo Moro, 5-00185 Rome, Italy
| | | | | | | | - Roberta Risoluti
- Department of Chemistry, University of Rome “La Sapienza”, P.le Aldo Moro, 5-00185 Rome, Italy
| | - Francesca Buiarelli
- Department of Chemistry, University of Rome “La Sapienza”, P.le Aldo Moro, 5-00185 Rome, Italy
| | - Elisa Sonego
- Department of Chemistry, University of Rome “La Sapienza”, P.le Aldo Moro, 5-00185 Rome, Italy
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