title: Estrogenic and dioxin-like potency in each step of a controlled landfill leachate treatment plant in Japan.
abstract: The estrogenic activity (by E-screen bioassay), the concentrations of PCBs, PCDDs/PCDFs (and their resulting toxicity equivalents, TEQ) and several endocrine disrupting chemicals (EDCs: e.g., bisphenol A, nonylphenol, Butyl benzylpthalate (BBP), di-n-butylphthalate (DBP), 17alpha-ethynyl-estradiol or 4-octylphenol) have been analyzed from leachates of each step (before treatment, after biodegradation/sedimentation and after charcoal treatment) of a controlled landfill leachate treatment plant. The comparison of the effluent of the examined landfill leachate treatment plant with water from a nearby river in this study indicated no additional dioxin-like (e.g., TEQ: 0.027 compared to 1.01 pg TEQ/l; PCBs: 1.2 compared to 3.9 ng/l) or estrogenic impact (2.8 compared to 3.5 ng estradiol equivalents EE/l; analyzed by E-screen bioassay) from the leachate treatment plant into the surrounding water environment. The impact of dioxin-like compounds from uncleaned leachates into the final cleaned effluents could be sufficiently reduced by the leachate treatment plant for PCDDs (75%), PCDFs (62%), dioxin-like PCBs (97%), and the sum of TEQ (78%). The leachate treatment plant also achieved a reduction of the estrogenic activity as determined by E-screen (from 4.8 to 2.8 ng EE/l = 42%), by GC/MS for bisphenol A (>96% and nonylphenol (>98%) or by ELISA for estradiol (>80%). Additionally, for the validation of the E-screen, five known endocrine disrupting chemicals (EDCs: bisphenol A, BBP, DBP, 17 alpha-ethynyl-estradiol, 4-octylphenol) were analyzed. The EC50 values and estradiol equivalents factors (EEFs) for the five EDCs determined in this study were comparable to previously published data. The combined biological and chemical trace analysis data have provided valuable information on the relative contribution of natural, synthetic, and non-steroidal anthropogenic chemicals to the estrogenic and dioxin-like activity in leachates from a wastewater treatment plant, and water from a nearby river.
authors.affiliation: Takasago Research Laboratories, Life Science RD Centre Kaneka Corporation, Japan. behnisch@takaken.kaneka.co.jp
authors.forename: P A
authors.initials: PA
authors.lastname: Behnisch
authors.forename: K
authors.initials: K
authors.lastname: Fujii
authors.forename: K
authors.initials: K
authors.lastname: Shiozaki
authors.forename: I
authors.initials: I
authors.lastname: Kawakami
authors.forename: S
authors.initials: S
authors.lastname: Sakai
mesh_terms: D001572:Benzofurans / Q000009:adverse effects*; D001673:Biodegradation, Environmental; D001681:Biological Assay; D001943:Breast Neoplasms / Q000473:pathology; D000072338:Dibenzofurans, Polychlorinated; D004703:Endocrine System / Q000187:drug effects*; D004785:Environmental Pollutants / Q000009:adverse effects*; D004967:Estrogens / Q000494:pharmacology; D005260:Female; D006801:Humans; D011078:Polychlorinated Biphenyls / Q000009:adverse effects*; D000072317:Polychlorinated Dibenzodioxins / Q000009:adverse effects* / Q000031:analogs & derivatives; D012037:Refuse Disposal; D012989:Soil Pollutants / Q000009:adverse effects*; D014407:Tumor Cells, Cultured; D014865:Waste Disposal, Fluid; D015262:Xenobiotics / Q000009:adverse effects
chemical_list: D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D004785:Environmental Pollutants; D004967:Estrogens; D000072317:Polychlorinated Dibenzodioxins; D012989:Soil Pollutants; D015262:Xenobiotics; D011078:Polychlorinated Biphenyls