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…

OPTIMIZING THE IDENTIFICATION OF NEW THIOLS AT TRACE LEVEL IN AGED RED WINES USING NEW OAK WOOD FUNCTIONALISATION STRATEGY

During bottle aging, many thiol compounds are involved in the expression of bouquet of great aged red wines according to the quality of the closure.1,2 Identifying thiol compounds in red wines is a challenging task due several drawbacks including, the complexity of the matrix, the low concentration of these impact compounds and the amount of wine needed.3,4
This work aims to develop a new strategy based on the functionalisation of oak wood organic extracts with H₂S, to produce new thiols, in order to mimic what can happen in red wine during bottle aging. Following this approach and through sensory analysis experiments, we demonstrated that the vanilla-like aroma of fresh oak wood was transformed into intense “meaty” nuances similar to those found in old but non oxidized red wines.

Read More

REGULATION OF CENTRAL METABOLISM IN THE LEAVES OF A GRAPE VINES VA- RIETAL COLLECTION ON A TEMPERATURE CLINE

Grape (Vitis vinifera) is one of the world’s oldest agricultural fruit crops, grown for wine, table grape, raisin, and other products. One of the factors that can cause a reduction in the grape growing area is temperature rise due to climate change. Elevated temperature causes changes in grapevine phenology and fruit chemical composition. Previous studies showed that grape varieties respond differently to a temperature shift of 1.5°C; few varieties had difficulties in the fruit development or could not reach the desired Brix level.

Read More

DEVELOPMENT OF DISTILLATION SENSORS FOR SPIRIT BEVERAGES PRODUCTION MONITORING BASED ON IMPEDANCE SPECTROSCOPY MEASUREMENT AND PARTIAL LEAST SQUARES REGRESSION (PLS-R)

During spirit beverages production, the distillate is divided in three parts: the head, the heart, and the tail. Acetaldehyde and ethanol are two key markers which allow the correct separation of distillate. Being toxic, the elimination of the head part, which contains high concentration of acetaldehyde, is crucial to guarantee the consumer’s health and security. Plus, the tail should be separated from the heart based on ethanol concentration.

Read More

PESTICIDE RESIDUES IN THE VINEYARD ENVIRONMENTS: VINE LEAVES, GRAPE BERRIES, WINES, HONEYBEES AND ASIAN HORNETS

Synthetic pesticides are widely used in viticulture to ensure steady harvest quality and quantity. Fungicides are primarily used to control grapevine diseases but insecticides and herbicides are likewise used. Pesticide residues in viticultural areas currently represent a strong societal concern, but may also affect different trophic chains in such areas. In this project we wish to analyse honeybees collected from hives placed in different vineyards, their natural predator (the invasive hornet Vespa velutina), as well as the honey, grape berries, and wines produced.

Read More

EFFECTS OF INDUCED SUNBURN DAMAGES ON WHITE WINE PROPERTIES

Climate change is a great challenge for the environment and affects the wine industry as well. Sunburn damage of sensitive grapes increase with severe heat periods. Besides significant loss of yield sunburn, modifies sensory properties of the wines and may cause climate-related off-flavours. To initiate sunburn in a controlled way, in 2021 sunburn was directly induced in the vineyard with the GrapeBurner device, exposing grapes of the varieties Riesling and Pinot Blanc with UV and IR radiation. This device was first assembled by Kai Müller of the university in Geisenheim and consists of a carriage with 6 UV/IR lamps. A 15 min irradiation was applied in early September at 60°Oe. Due to the colder season in 2021 the grapes were not harmed by previous sunburn damage.

Read More