Linking current river pollution to historical pesticide use: Insights for territorial management?

Rossa, Pauline Della; Jannoyer, Magalie; Mottes, Charles; Plet, Joanne; Bazizi, Abderazak; Arnaud, Luc; Jestin, Alexandra; Woignier, Thierry; Gaude, Jean-Marie; Cattan, Philippe

doi:10.1016/j.scitotenv.2016.07.065

Cited by 31 publications

(43 citation statements)

References 42 publications

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“…in banana cropping areas, irrespective of geology and soils. This was consistent with a global link between the location of contaminated soil areas and the location of contaminated rivers, as shown on a watershed scale by Della Rossa (2017). Surprisingly, we found that, overall, the soil type had no significant effect on water CLD content in SW, although large differences in CLD content were usually encountered in soils (Clostre et al, 2015;Devault et al, 2016).…”

Section: Cld Is Degraded and Contamination Decreasessupporting

confidence: 91%

“…CLD was used from 1970 to 1993 to control the black weevil (Cosmopolites sordidus) in banana plantations. Application intensity greatly depended on the farmers (Cabidoche et al, 2009;Della Rossa et al, 2017;Levillain et al, 2012) and introduced high spatial variability in soil contamination. Despite its worldwide ban in 1992 (there was an exemption in FWI until 1993), CLD continues to contaminate aquatic ecosystems in different parts of the world (Coat et al, 2011;Luellen et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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A conceptual model of organochlorine fate from a combined analysis of spatial and mid- to long-term trends of surface and ground water contamination in tropical areas (FWI)

Cattan

Charlier

Clostre

et al. 2019

Hydrol. Earth Syst. Sci.

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Abstract. In this study, we investigated the management of long-term environmental pollution by organic pollutants such as organochlorine pesticides. We set out to identify conditions that are conducive to reducing pollution levels for these persistent molecules and then propose a conceptual model of organochlorine fate in water. Our approach looked at spatio-temporal changes in pollutant contents in surface water (SW) and groundwater (GW) on a large scale, in order to decipher the respective roles of soil, geology, hydrology and past treatment practices. The case of chlordecone (CLD) on the island of Martinique (1100 km2) was selected given the sampling campaigns carried out since 2007 over more than 150 sites. CLD, its metabolite chlordecone-5b-hydro (5bCLD) and the metabolite-to-parent-compound ratio were compared. As regards the spatial variability of water contamination, our results showed that banana cropping areas explained the location of contaminated SW and GW, whereas the combination of soil and geology factors explained the main spatial variability in the 5bCLD∕CLD ratio. For temporal variability, these conditions defined a high diversity of situations in terms of the duration of pollution, highlighting two groups: water draining old geological formations and ferralsols or vertisols vs. recent geology and andosols. A conceptual leaching model provided some key information to help interpret downward trends in CLD and 5bCLD observed in water. Lastly, a conceptual model of organochlorine fate is proposed to explain the diversity of the 5bCLD∕CLD ratio in water. Our conclusions highlight the combined role of soil and groundwater residence time for differentiating between conditions that are more conducive, or not, to the disappearance of CLD from the environment. This paper presents a model that provides an overall perception of organochlorine pesticide fate in the environment.

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Section: Cld Is Degraded and Contamination Decreasessupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

A conceptual model of organochlorine fate from a combined analysis of spatial and mid- to long-term trends of surface and ground water contamination in tropical areas (FWI)

Cattan

Charlier

Clostre

et al. 2019

Hydrol. Earth Syst. Sci.

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“…In order to validate laboratory results and the discovery of novel chlordecone TP, several representative environmental compartments contaminated with chlordecone were sampled on Martinique Island, including Galion River basin (water, bed sediments and mangrove) [29,49], andosol, nitisol and ferralsol soils [47,50], as well as ashes and pumice stones (Table S4).…”

Section: Natural Chlordecone Degradation On the Martinique Islandmentioning

confidence: 99%

“…On a wider scale, extensive use of chlordecone from 1972 to 1993 in banana plantations of the French West Indies (FWI) has resulted in a long-term pollution of environmental compartments and the local food chain (soils, water resources, farmed animals, fish) [6,12,13]. Chronic exposure to chlordecone has resulted in human health problems [13][14][15][16][17][18][19][20][21][22][23][24][25][26] and subsequent socioeconomic issues for the FWI and the James River area [27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Natural Chlordecone Degradation Revealed by Numerous Transformation Products Characterized in Key French West Indies Environmental Compartments

Chevallier

Della-Negra

Chaussonnerie

et al. 2019

Environ. Sci. Technol.

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Production and use of the insecticide chlordecone has caused long-term environmental pollution in the James River area and the French West Indies (FWI) that has resulted in acute human-health problems and a social crisis. High levels of chlordecone in FWI soils, even after its ban decades ago, and the absence of detection of transformation products (TPs), have suggested that chlordecone is virtually nonbiodegradable in the environment. Here, we investigated laboratory biodegradation, consisting of bacterial liquid cultures and microcosms inoculated with FWI soils, using a dual nontargeted GC-MS and LC-HRMS approach. In addition to previously reported, partly characterized hydrochlordecones and polychloroindenes (families A and B), we discovered 14 new chlordecone TPs, assigned to four families (B, C, D, and E). Organic synthesis and NMR analyses allowed us to achieve the complete structural elucidation of 19 TPs. Members of TP families A, B, C, and E were detected in soil, sediment, and water samples from Martinique and include 17 TPs not initially found in commercial chlordecone formulations. 2,4,5,6,7-Pentachloroindene was the most prominent TP, with levels similar to those of chlordecone. Overall, our results clearly show that chlordecone pollution extends beyond the parent chlordecone molecule and includes a considerable number of previously undetected TPs. Structural diversity of the identified TPs illustrates the complexity of chlordecone degradation in the environment and raises the possibility of extensive worldwide pollution of soil and aquatic ecosystems by chlordecone TPs.

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“…In the tropical context, several research has been conducted on water contamination by pesticides (Lewis et al, 2016), but few were conducted in tropical context at the catchment scale (Houdart et al, 2009). Tropical studies, that explicitly consider the catchment scale, were focused on one pesticide or one cropping system and did not account for the diversity of horticultural cropping systems of such places (Castillo et al, 2000;Charlier et al, 2009;Varca, 2012;Crabit et al, 2016;Della Rossa et al, 2017). This makes it difficult for water resource managers to select priority measures on such context.…”

Section: Introductionmentioning

confidence: 99%

Relationships between past and present pesticide applications and pollution at a watershed outlet: The case of a horticultural catchment in Martinique, French West Indies

et al. 2017

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The understanding of factors affecting pesticide transfers to catchment outlet is still at a very early stage in tropical context, and especially on tropical volcanic context. We performed on-farm pesticide use surveys during 87 weeks and monitored pesticides in water weekly during 67 weeks at the outlet of a small catchment in Martinique. We identified three types of pollution. First, we showed long-term chronic pollution by chlordecone, diuron and metolachlor resulting from horticultural practices applied 5-20 years ago (quantification frequency higher than 80%). Second, we showed peak pollution. High amounts of propiconazole and fosthiazate applied at low frequencies caused river pollution peaks for weeks following a single application. Low amounts of diquat and diazinon applied at low frequencies also caused pollution peaks. The high amounts of glyphosate applied at high frequency resulted into pollution peaks by glyphosate and aminomethylphosphonic acid (AMPA) in 6 and 20% of the weeks. Any intensification of their uses will result in higher pollution levels. Third, relatively low amounts of glufosinate-ammonium, difenoconazol, spinosad and metaldehyde were applied at high frequencies. Unexpectedly, such pesticides remained barely detected (<1.5%) or undetected in water samples. We showed that AMPA, fosthiazate and propiconazole have serious leaching potential. They might result in future chronic pollution of shallow aquifers alimenting surface water. We prove that to avoid the past errors and decrease the risk of long-term pollution of water resources, it is urgent to reduce or stop the use of pesticides with leaching potential by changing agricultural practices.

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Linking current river pollution to historical pesticide use: Insights for territorial management?

Cited by 31 publications

References 42 publications

A conceptual model of organochlorine fate from a combined analysis of spatial and mid- to long-term trends of surface and ground water contamination in tropical areas (FWI)

A conceptual model of organochlorine fate from a combined analysis of spatial and mid- to long-term trends of surface and ground water contamination in tropical areas (FWI)

Natural Chlordecone Degradation Revealed by Numerous Transformation Products Characterized in Key French West Indies Environmental Compartments

Relationships between past and present pesticide applications and pollution at a watershed outlet: The case of a horticultural catchment in Martinique, French West Indies

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