文章基本信息

标题：Health of Brockport creek following removal of contaminated sediment from an upstream tributary
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作者：Marc A. Chalupnicki ; James M. Haynes
期刊名称：Journal of Environmental Chemistry and Ecotoxicology
电子版ISSN：2141-226X
出版年度：2011
卷号：3
期号：5
页码：127-138
语种：English
出版社：Academic Journals
摘要：After removing contaminated sediments from a toxic waste site’s outlet stream into Brockport creek, PCB concentrations in the outlet stream dropped from 1,730 to 34,900 µg/kg in 2002 to 288 to 432 µg/kg in 2003. Concentrations are now below water quality criteria for aquatic organisms and human health. Concentrations of eight metals (Arsenic, Barium, Cadmium, Chromium, Copper, Lead, Nickel, Zinc) also decreased greatly but because of naturally high background levels several remain above water quality criteria. The benthic macroinvertebrate community at the remediated site was severely degraded by dredging but showed signs of recovery the next year. All but one of the other sites sampled above and below the outlet stream from the toxic waste site had moderately polluted or disturbed benthic macroinvertebrate communities typical of the region. No patterns of sediment toxicity (survival, growth, reproduction) were observed forDaphnia magna,Hyalella aztecaandPimephales promelasin relation to sampling locations in the waste site’s outlet stream and Brockport creek. The cleanup of the contaminated outlet stream appears to have been successful.
关键词：Toxicity testing; PCBs; metals; benthic macro invertebrates.