Abstract：
:A battery of in vitro bioassays, including a Neutral Red (NR) assay using MCF-7 cells for predicting cytotoxic chemicals, an ethoxy resorufin-O-deethylase (EROD) activity assay using H4IIE cells to check for dioxin-like chemicals, and a recombinant gene yeast assay for screening estrogenic chemicals, was conducted to assess the removal efficiencies of trace toxic chemicals by different treatment processes in the waste water treatment plant (WWTP). The effluents were extracted by solid phase extraction (SPE) and were fractionated into three fractions based on polarities. The battery of bioassays was performed for each fraction. In the battery, the toxicities of the effluents were described according to their modes of actions (MOA) or biomarkers and the properties of the toxic chemicals were categorized by their polarities and MOAs. The proposed procedure could be used as a tool to diagnose the toxic characteristics of the complicate mixture. The results showed that cytotoxic, dioxin-like and estrogenic chemicals could be detected in all samples. In the influent, cytotoxic and dioxin-like chemicals were mainly in polar fraction and estrogenic chemicals were in non-polar and moderate-polar fractions. The secondary treatment (active sludge) could remove a small amount of these toxicants. Among different types of advanced treatments, flocculation was good enough to remove most of the cytotoxic chemicals and a combination of flocculation, ozone oxidation, and post-biological treatment could eliminate most of the dioxin-like and estrogenic chemicals.
journal_name
Arch Environ Contam Toxicoljournal_title
Archives of environmental contamination and toxicologyauthors
Ma M,Li J,Wang Zdoi
10.1007/s00244-004-0204-zsubject
Has Abstractpub_date
2005-11-01 00:00:00pages
480-7issue
4eissn
0090-4341issn
1432-0703journal_volume
49pub_type
杂志文章abstract：:We measured halogenated organic contaminants (HOCs) [polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs), and dichloro-diphenyl-trichloroethane (DDT)] and P450 [e.g., ethoxyresorufin-O-dealkylase (EROD)] stress in livers from Caspian tern (Hydroprogne caspia) adults and Forster's tern (Sterna fors...
journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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abstract：:Aquatic insects are an important component of the food web in salt marshes, therefore it is necessary to test whether pesticides used to control mosquitoes in salt marshes are safe for nontarget insects. We tested the nontarget effects of a combined formulation (duplex) of Bacillus thuringiensis israelensis (B.t.i.) a...
journal_title：Archives of environmental contamination and toxicology
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