title: Bisphenol-A in artificial indoor streams: I. Fate and effects on aufwuchs.
abstract: The disappearance (DT50) from water-phase and effects on aufwuchs of three nominal concentrations (5, 50 and 500 microg/l) of bisphenol-A (BPA) were investigated in artificial indoor streams over a period of 103 days. HPLC was used for analyses of BPA in water. Because of the disappearance of BPA from the water-phase, a pulse dosed exposure in weekly intervals was established. At the beginning of the exposure, a lag-phase of approximately 3-8 days was noted. Afterwards DT50 values (time, when 50% of initial BPA disappeared) were about 1 day with no clear trend to lower values during the experiment. The dynamics of aufwuchs was investigated on artificial substrates (unglazed ceramic tiles) in 14-day intervals and quantified by ash free dry weight (AFDW). As an ecotoxicological endpoint the area under the biomass/time curve (AUC) was calculated for: (a) the absolute AFDW-values and (b) values as percentage of start biomass (value of day-2 set as 100%). The reduction of AUC by 10% (EC10) and 50% (EC50) for absolute values was 11 microg/l (nominal: 38) and 46 microg/l (450), respectively; for values as percentage of start biomass: EC10 20 microg/l (239) and EC50 73 microg/l (806). These values are 20-70-fold lower compared to results from standard algae tests (EbC, 96 h).
authors.affiliation: BUA-Office Ecotoxicology, Dresden University of Technology, 01062 Dresden, Germany. oliver.licht@mailbox.tu-dresden.de
authors.forename: Oliver
authors.initials: O
authors.lastname: Licht
authors.forename: Dirk
authors.initials: D
authors.lastname: Jungmann
authors.forename: Vanessa
authors.initials: V
authors.lastname: Ladewig
authors.forename: Kai-Uwe
authors.initials: KU
authors.lastname: Ludwichowski
authors.forename: Roland
authors.initials: R
authors.lastname: Nagel
mesh_terms: D000818:Animals; D001559:Benzhydryl Compounds; D018533:Biomass; D002851:Chromatography, High Pressure Liquid; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods*; D020387:Food Chain; D007448:Invertebrates / Q000187:drug effects*; D010636:Phenols / Q000633:toxicity*; D012722:Sewage; D014871:Water Microbiology; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D014881:Water Supply; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D010636:Phenols; D012722:Sewage; D014874:Water Pollutants, Chemical; C006780:bisphenol A; D000098826:Bisphenol A Compounds