Ecotoxicity of Diazinon and Atrazine Mixtures after Ozonation Catalyzed by Na<sup>+</sup> and Fe<sup>2+</sup> Exchanged Montmorillonites on <i>Lemna minor</i>
The toxicity of two pesticides, diazinon (DAZ) and atrazine (ATR), before and after montmorillonite-catalyzed ozonation was comparatively investigated on the duckweed <i>Lemna minor</i>. The results allowed demonstrating the role of clay-containing media in the evolution in time of pesti...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-08-01
|
| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/28/16/6108 |
| _version_ | 1797583622997278720 |
|---|---|
| author | Amina Benghaffour Abdelkrim Azzouz David Dewez |
| author_facet | Amina Benghaffour Abdelkrim Azzouz David Dewez |
| author_sort | Amina Benghaffour |
| collection | DOAJ |
| description | The toxicity of two pesticides, diazinon (DAZ) and atrazine (ATR), before and after montmorillonite-catalyzed ozonation was comparatively investigated on the duckweed <i>Lemna minor</i>. The results allowed demonstrating the role of clay-containing media in the evolution in time of pesticide negative impact on <i>L. minor</i> plants. Pesticides conversion exceeded 94% after 30 min of ozonation in the presence of both Na<sup>+</sup> and Fe<sup>2+</sup> exchanged montmorillonites. Toxicity testing using <i>L. minor</i> permitted us to evaluate the change in pesticide ecotoxicity. The plant growth inhibition involved excessive oxidative stress depending on the pesticide concentration, molecular structure, and degradation degree. Pesticide adsorption and/or conversion by ozonation on clay surfaces significantly reduced the toxicity towards <i>L. minor</i> plants, more particularly in the presence of Fe(II)-exchanged montmorillonite. The results showed a strong correlation between the pesticide toxicity towards <i>L. minor</i> and the level of reactive oxygen species, which was found to depend on the catalytic activity of the clay minerals, pesticide exposure time to ozone, and formation of harmful derivatives. These findings open promising prospects for developing a method to monitor pesticide ecotoxicity according to clay-containing host-media and exposure time to ambient factors. |
| first_indexed | 2024-03-10T23:41:24Z |
| format | Article |
| id | doaj.art-58d964af6b0247b78c6f0db28903d9b3 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T23:41:24Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-58d964af6b0247b78c6f0db28903d9b32023-11-19T02:24:59ZengMDPI AGMolecules1420-30492023-08-012816610810.3390/molecules28166108Ecotoxicity of Diazinon and Atrazine Mixtures after Ozonation Catalyzed by Na<sup>+</sup> and Fe<sup>2+</sup> Exchanged Montmorillonites on <i>Lemna minor</i>Amina Benghaffour0Abdelkrim Azzouz1David Dewez2NanoQAM, Department of Chemistry, University of Quebec at Montreal, Montreal, QC H3C 3P8, CanadaNanoQAM, Department of Chemistry, University of Quebec at Montreal, Montreal, QC H3C 3P8, CanadaNanoQAM, Department of Chemistry, University of Quebec at Montreal, Montreal, QC H3C 3P8, CanadaThe toxicity of two pesticides, diazinon (DAZ) and atrazine (ATR), before and after montmorillonite-catalyzed ozonation was comparatively investigated on the duckweed <i>Lemna minor</i>. The results allowed demonstrating the role of clay-containing media in the evolution in time of pesticide negative impact on <i>L. minor</i> plants. Pesticides conversion exceeded 94% after 30 min of ozonation in the presence of both Na<sup>+</sup> and Fe<sup>2+</sup> exchanged montmorillonites. Toxicity testing using <i>L. minor</i> permitted us to evaluate the change in pesticide ecotoxicity. The plant growth inhibition involved excessive oxidative stress depending on the pesticide concentration, molecular structure, and degradation degree. Pesticide adsorption and/or conversion by ozonation on clay surfaces significantly reduced the toxicity towards <i>L. minor</i> plants, more particularly in the presence of Fe(II)-exchanged montmorillonite. The results showed a strong correlation between the pesticide toxicity towards <i>L. minor</i> and the level of reactive oxygen species, which was found to depend on the catalytic activity of the clay minerals, pesticide exposure time to ozone, and formation of harmful derivatives. These findings open promising prospects for developing a method to monitor pesticide ecotoxicity according to clay-containing host-media and exposure time to ambient factors.https://www.mdpi.com/1420-3049/28/16/6108diazinonatrazineadsorptionozonation<i>Lemna minor</i>toxicity |
| spellingShingle | Amina Benghaffour Abdelkrim Azzouz David Dewez Ecotoxicity of Diazinon and Atrazine Mixtures after Ozonation Catalyzed by Na<sup>+</sup> and Fe<sup>2+</sup> Exchanged Montmorillonites on <i>Lemna minor</i> Molecules diazinon atrazine adsorption ozonation <i>Lemna minor</i> toxicity |
| title | Ecotoxicity of Diazinon and Atrazine Mixtures after Ozonation Catalyzed by Na<sup>+</sup> and Fe<sup>2+</sup> Exchanged Montmorillonites on <i>Lemna minor</i> |
| title_full | Ecotoxicity of Diazinon and Atrazine Mixtures after Ozonation Catalyzed by Na<sup>+</sup> and Fe<sup>2+</sup> Exchanged Montmorillonites on <i>Lemna minor</i> |
| title_fullStr | Ecotoxicity of Diazinon and Atrazine Mixtures after Ozonation Catalyzed by Na<sup>+</sup> and Fe<sup>2+</sup> Exchanged Montmorillonites on <i>Lemna minor</i> |
| title_full_unstemmed | Ecotoxicity of Diazinon and Atrazine Mixtures after Ozonation Catalyzed by Na<sup>+</sup> and Fe<sup>2+</sup> Exchanged Montmorillonites on <i>Lemna minor</i> |
| title_short | Ecotoxicity of Diazinon and Atrazine Mixtures after Ozonation Catalyzed by Na<sup>+</sup> and Fe<sup>2+</sup> Exchanged Montmorillonites on <i>Lemna minor</i> |
| title_sort | ecotoxicity of diazinon and atrazine mixtures after ozonation catalyzed by na sup sup and fe sup 2 sup exchanged montmorillonites on i lemna minor i |
| topic | diazinon atrazine adsorption ozonation <i>Lemna minor</i> toxicity |
| url | https://www.mdpi.com/1420-3049/28/16/6108 |
| work_keys_str_mv | AT aminabenghaffour ecotoxicityofdiazinonandatrazinemixturesafterozonationcatalyzedbynasupsupandfesup2supexchangedmontmorillonitesonilemnaminori AT abdelkrimazzouz ecotoxicityofdiazinonandatrazinemixturesafterozonationcatalyzedbynasupsupandfesup2supexchangedmontmorillonitesonilemnaminori AT daviddewez ecotoxicityofdiazinonandatrazinemixturesafterozonationcatalyzedbynasupsupandfesup2supexchangedmontmorillonitesonilemnaminori |