terclim by ICS banner
IVES 9 IVES Conference Series 9 INTENSE PULSED LIGHT FOR VINEYARD WASTEWATER: A PROMISING NEW PROCESS OF DEGRADATION FOR PESTICIDES

INTENSE PULSED LIGHT FOR VINEYARD WASTEWATER: A PROMISING NEW PROCESS OF DEGRADATION FOR PESTICIDES

Abstract

The use of pesticides for vine growing is responsible for generating an important volume of wastewater. In 2009, 13 processes were authorized for wastewater treatment but they are expensive and the toxicological impact of the secondary metabolites that are formed is not clearly established. Recently photodecomposition processes have been studied and proved an effectiveness to degrade pesticides and to modify their structures (Maheswari et al., 2010, Lassale et al., 2014). In this field, Pulsed Light (PL) seems to be an interesting and efficient process (Baranda et al., 2017). Therefore, the aim of this work was to investigate the PL technology as a new process for the degradation of pesticides.

The degradation by PL with a LPBox (Sanodev) of 20 pesticides widely used in viticulture was studied by HPLC-MS/MS. Firstly, untargeted analyses were performed in order to observe secondary metabolites formed during PL treatments. This study allowed to detect 118 metabolites and 53 hypotheses of structures were proposed using m/z, isotopic patterns of the molecules containing halogens as well as results previously obtained in the literature. Then, a quantitative method was built for the 20 studied pesticides and for the compounds previously identified as secondary metabolites. Two transitions per compound were used following fragmentation experiments. The developed MRM method allows absolute quanti- fication of the parent molecules and relative quantification of 87 major secondary metabolites. In order to further study the degradation ability of LPBox on pesticides, 7 pesticides were selected because of their rapid degradation with PL. An optimization was made to identify the number of pulses needed to degrade the 7 pesticides. These experiments show that the different light rays produced by LPBox are able to degrade pesticides from their LC50 (Daphnia Magna) to a concentration lower than their limit of quantification (LOQ). These experiments also demonstrate that it is possible to relatively quantify secondary metabolites of pesticides after PL treatment. Real wastewater samples were also treated by PL showing effective degradation of pesticides.

In conclusion, our results proved that PL has an effective impact on all pesticides treated although the fluence needed is molecule-dependent. An optimization in terms of fluence showed that it was possible to degrade pesticides from a toxic concentration to a concentration below the LOQ.

 

1. Baranda, A. B.; Lasagabaster, A.; de Marañón, I. M. Static and Continuous Flow-through Pulsed Light Technology for Pesti-cide Abatement in Water. Journal of Hazardous Materials 2017, 340, 140–151. https://doi.org/10.1016/j.jhazmat.2017.07.012.
2. Lassalle, Y.; Kinani, A.; Rifai, A.; Souissi, Y.; Clavaguera, C.; Bourcier, S.; Jaber, F.; Bouchonnet, S. UV-Visible Degradation of Boscalid – Structural Characterization of Photoproducts and Potential Toxicity Using in Silico Tests: UV-Visible Degradation of Boscalid. Rapid Commun. Mass Spectrom. 2014, 28 (10), 1153–1163. https://doi.org/10.1002/rcm.6880.
3. Maheswari, M. A.; Lamshöft, M.; Sukul, P.; Spiteller, P.; Zühlke, S.; Spiteller, M. Photochemical Analysis of 14C-Fenhexa-mid in Aqueous Solution and Structural Elucidation of a New Metabolite. Chemosphere 2010, 81 (7), 844–852. https://doi. org/10.1016/j.chemosphere.2010.08.013. 

DOI:

Publication date: February 9, 2024

Issue: OENO Macrowine 2023

Type: Article

Authors

F. Clavero¹,², R. Ghidossi¹, N. Picard², F. Meytraud², G. de Revel¹ and C. Franc¹

1. Université de Bordeaux, INRAE, Bordeaux INP, Bordeaux Sciences Agro, UMR 1366, ŒNO, ISVV, F-33140 Villenave d’Or-non, France
2. SANODEV, 1, Avenue d’ESTER  – 87 100 LIMOGES

Contact the author*

Keywords

Photo-degradation, phytosanitary products, metabolites, wastewater

Tags

IVES Conference Series | oeno macrowine 2023 | oeno-macrowine

Citation

Related articles…

INFLUENCES OF SO2 ADDITION AND STORAGE CONDITIONS IN THE DETERMINATION OF MEAN DEGREE OF POLYMERIZATION OF PROANTHOCYANIDINS IN AGED RED WINES

The structural diversity is one of the most remarkable characteristics of proanthocyanidins (PA). Indeed, PA in wines may vary in the B-ring and C-ring substitutes, the C-ring stereochemistry, the degree of polymerization (DP) and the linkage between the monomers. Knowing in detail the structural characteristics of the PA of a wine can help us to understand and modulate several sensorial characteristics of the wine, such as color, antioxidant properties, flavor, and mouthfeel properties. In the last years was discovered and confirmed the presence of sulfonated monomeric and oligomeric flavan-3-ols in wine [1], as well as was pointed out their importance in wine quality [1,2].

Read More

CONTRIBUTION OF VOLATILE THIOLS TO THE AROMA OF RIESLING WINES FROM THREE REGIONS IN GERMANY AND FRANCE (RHEINGAU, MOSEL, AND ALSACE)

Riesling wines are appreciated for their diverse aromas, ranging from the fruity fresh characters in young vintages to the fragrant empyreumatic notes developed with aging. Wine tasters often refer to Riesling wines as prime examples showcasing terroir, with their typical aroma profiles reflecting the geographical provenance of the wine. However, the molecular basis of the distinctive aromas of these varietal wines from major Riesling producing regions in Europe have not been fully elucidated. In this study, new lights were shed on the chemical characterization and the sensory contribution of volatile thiols to Riesling wines from Rheingau, Mosel, and Alsace. First, Riesling wines (n = 46) from the three regions were collected and assessed for their aroma typicality by an expert panel.

Read More

WINE LEES AS A SOURCE OF NITROGEN FOR OENOCOCCUS OENI TO IMPROVE MALOLACTIC FERMENTATION PERFORMANCE

Malolactic fermentation (MLF) is a desired process in red and acidic white wines, after alcoholic fermentation (AF), carried out by the lactic acid bacterium (LAB) Oenococcus oeni. The advantages are an increase of pH, microbiological stabilization and organoleptic improvement of the final wine. However, the presence of stress factors such as ethanol, low pH, high total SO2, lack of nutrients and presence of inhibitors, could affect the successful completion of MLF [1]. Changes in amino acid composition and deficiencies in peptides after AF, showed that MLF can be delayed, signaling its importance for bacterial growth and L-malic acid degradation during MLF [2].

Read More

IMPACT OF RHIZOPUS AND BOTRYTIS ON WINE FOAMING PROPERTIES

A lot of work has been done on the impact of Botrytis on the foam of sparkling wines. This work often concerns wines produced in cool regions, where Botrytis is the dominant fungal pathogen. However, in southern countries such as Spain, in particularly hot years such as 2022, the majority fungal pathogen is sometimes Rhizopus. Like Botrytis, Rhizopus is a fungus that produces an aspartic protease.

Read More

TANNINS AND ANTHOCYANINS KINETICS OF EXTRACTION FROM ARINARNOA, MARSELAN AND TANNAT UNDER DIFFERENT WINEMAKING TECHNIQUES

Marselan wines have an unusual high proportion of seed derived tannins from grapes having high proportions of skins, which are rich in tannins. But the causes behind this characteristic have not yet been identified. In vintage 2023 wines were made at experimental scale (9 kg by experimental unit) from Arinarnoa, Marselan and Tannat Vitis vinifera grape cultivars by traditional maceration, and by techniques aimed to increase the wine content in skin derived tannin: addition of extraction enzymes, addition at vatting of grape-skin enological tannins, or by extended maceration, known to increase the seed derived tannin contents of wines.

Read More