title: Sorption and degradation of selected five endocrine disrupting chemicals in aquifer material.
abstract: Sorption and degradation of the five selected endocrine disrupting chemicals (EDCs) including bisphenol A (BPA), 17 beta-estradiol (E2), 17 alpha-ethynylestradiol (EE2), 4-tert-octylphenol (4-t-OP) and 4-n-nonylphenol (4-n-NP) have been investigated in the laboratory using sediment and groundwater from an aquifer in Bolivar, South Australia. The sorption coefficients measured on the sediment were in the following order: 4-n-NP>4-t-OP>EE2>E2>BPA. The sorption coefficients (Kf values) for the five EDCs were 3.89, 21.8, 24.2, 90.9 and 195, respectively. The alkylphenols 4-t-OP and 4-n-NP had strong binding on the sediment while BPA had a weak affinity. Degradation experiments of the five EDCs showed that E2 and 4-n-NP degraded quickly under aerobic conditions with a half-life of 2 and 7 days, respectively. EE2 degraded slowly with an estimated half-life of 81 days in the aquifer material under aerobic conditions while the other two chemicals (BPA and 4-t-OP) remained almost unchanged. Little or no degradation of the five EDCs except slow degradation for E2 was observed within 70 days under anaerobic conditions in native groundwater.
authors.affiliation: Adelaide laboratory, CSIRO Land and Water, PMB 2, Glen Osmond, Adelaide SA 5064, Australia. guang-guo.ying@csiro.au
authors.forename: Guang-Guo
authors.initials: GG
authors.lastname: Ying
authors.forename: Rai S
authors.initials: RS
authors.lastname: Kookana
authors.forename: Peter
authors.initials: P
authors.lastname: Dillon
mesh_terms: D000327:Adsorption; D001421:Bacteria, Anaerobic; D001673:Biodegradation, Environmental; D004703:Endocrine System / Q000187:drug effects*; D006207:Half-Life; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D014881:Water Supply
chemical_list: D012989:Soil Pollutants; D014874:Water Pollutants, Chemical