title: Effects of platinum (Pt4+) on Lumbriculus variegatus Müller (Annelida, Oligochaetae): acute toxicity and bioaccumulation.
abstract: The acute toxicity and bioaccumulation (rates, kinetic) of tetravalent platinum in Lumbriculus variegatus under different physicochemical conditions (temperature and total water hardness) were investigated. Increased Pt4+ concentration (from 0.05 to 50 mg/L), exposure (up to 30 days), temperature (from 4 to 20 degrees C) and decreasing water hardness (from 300 to 0 mg/L CaCO3) increased Pt toxicity. The metal accumulated at a constant rate that was concentration, temperature and time dependent. The median lethal concentration (96h LC50) varied greatly from 0.397 mg/L in distilled water to 30 mg/L in the hard water from Champagne. Thus, L. var. can tolerate high levels of Pt. As a result, L. var. can be used in the laboratory to analyze mechanisms of adaptation to the induced stress and in the field as an indicator of Pt pollution.
authors.affiliation: Université de Reims Champagne-Ardenne, Laboratoire de Zoologie et des Sciences de l'Environement, Groupe d'Etudes Régionales de Biologie des Eaux (G.E.R.B.E.), BP 1039, 51687 Reims, Cédex 2, France.
authors.forename: I
authors.initials: I
authors.lastname: Veltz
authors.forename: F
authors.initials: F
authors.lastname: Arsac
authors.forename: S
authors.initials: S
authors.lastname: Biagianti-Risbourg
authors.forename: F
authors.initials: F
authors.lastname: Habets
authors.forename: H
authors.initials: H
authors.lastname: Lechenault
authors.forename: G
authors.initials: G
authors.lastname: Vernet
mesh_terms: D000818:Animals; D002119:Calcium Carbonate / Q000032:analysis / Q000737:chemistry; D004305:Dose-Response Relationship, Drug; D005602:France; D007928:Lethal Dose 50; D009835:Oligochaeta / Q000187:drug effects / Q000378:metabolism*; D017671:Platinum Compounds / Q000378:metabolism / Q000633:toxicity*; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000378:metabolism / Q000633:toxicity*
chemical_list: D017671:Platinum Compounds; D014874:Water Pollutants, Chemical; D002119:Calcium Carbonate