title: Encaged Chironomus riparius larvae in assessment of trace metal bioavailability and transfer in a landfill leachate collection pond.
abstract: Household wastes may constitute a vector of environmental contamination when buried, in particular through degradation and production of leachates containing significant trace metal (TM) concentrations that may constitute a serious risk to biota. The objectives of this study were to assess the bioavailability and transfer potential of various TMs present in water and sediments in a reservoir receiving landfill leachates. An active biomonitoring approach was adopted consisting of exposing naive laboratory organisms in cages deployed in the field. Aquatic insects such as Chironomus riparius larvae are good candidates since they represent key organisms in the trophic functioning of aquatic ecosystems. The results show that water, suspended particles, and sediments were significantly contaminated by various TMs (As, Cd, Cu, Ni, Pb, and Zn). Their contribution to the transfer of TMs depends, however, on the specific element considered, e.g., Cd in sediments or Pb in both suspended particles and sediments. The internal fate of TMs was investigated according to their fractionation between an insoluble and a cytosolic fraction. This approach revealed different detoxification strategies capable of preventing the induction of deleterious effects at the individual scale. However, the accumulation of several TMs in C. riparius larvae tissues may also represent a significant load potentially transferable to higher trophic levels.
authors.affiliation: UMR CNRS 6249 Chrono-Environnement, University of Bourgogne Franche-Comté, Route de Gray, 25030, Besançon Cedex, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Gimbert
authors.affiliation: UMR CNRS 6249 Chrono-Environnement, University of Bourgogne Franche-Comté, Route de Gray, 25030, Besançon Cedex, France.
authors.forename: Quentin
authors.initials: Q
authors.lastname: Petitjean
authors.affiliation: UMR CNRS 6249 Chrono-Environnement, University of Bourgogne Franche-Comté, Route de Gray, 25030, Besançon Cedex, France.|Thi Qar University, Al Nasiriyah, IQ-64001, Iraq.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Al-Ashoor
authors.affiliation: UMR CNRS 6249 Chrono-Environnement, University of Bourgogne Franche-Comté, Route de Gray, 25030, Besançon Cedex, France.
authors.forename: Céline
authors.initials: C
authors.lastname: Cretenet
authors.affiliation: UMR CNRS 6249 Chrono-Environnement, University of Bourgogne Franche-Comté, Route de Gray, 25030, Besançon Cedex, France. lotfi.aleya@univ-fcomte.fr.
authors.forename: Lotfi
authors.initials: L
authors.lastname: Aleya
mesh_terms: D000818:Animals; D001682:Biological Availability; D002683:Chironomidae / Q000378:metabolism*; D017753:Ecosystem; D004784:Environmental Monitoring; D019015:Geologic Sediments; D007814:Larva / Q000378:metabolism; D061005:Ponds; D012989:Soil Pollutants / Q000378:metabolism*; D014131:Trace Elements / Q000378:metabolism*; D064091:Waste Disposal Facilities; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D012989:Soil Pollutants; D014131:Trace Elements; D014874:Water Pollutants, Chemical
keywords: Active biomonitoring; Contamination sources; Fractionation; Toxicokinetics; Wetland