Document Detail

Toxicity of haloacetic acids to freshwater algae.
MedLine Citation:
PMID:  19828197     Owner:  NLM     Status:  MEDLINE    
Haloacetic acids (HAA), such as trichloroacetic acid (TCA), are commonly occurring by-products from disinfection and bleaching processes using sodium hypochlorite. Currently, the lowest no observed effect concentration (NOEC) for TCA is reported to be 8.7microgL(-1), which was derived from a toxicity study conducted in 1981 on Chlorella pyrenoidosa. The purity of the test material was not documented and it is unknown if other halogenated impurities or co-formulants were present. However, this NOEC is used to derive a predicted no effect concentration, which is used in various regulatory risk assessments. We present a range of algal toxicity studies conducted on five different algal species and two HAAs and observed no toxicity of TCA to C. pyrenoidosa at 115mgL(-1). The most sensitive species to TCA (NOEC, 3mgL(-1)) were Pseudokirchneriella subcapitata and Scenedesmus subspicatus, demonstrating that the toxicity of TCA to algae is over two orders of magnitude less sensitive than previously reported.
Jayne F Roberts; Roger van Egmond; Oliver R Price
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-10-13
Journal Detail:
Title:  Ecotoxicology and environmental safety     Volume:  73     ISSN:  1090-2414     ISO Abbreviation:  Ecotoxicol. Environ. Saf.     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2009-11-10     Completed Date:  2010-01-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7805381     Medline TA:  Ecotoxicol Environ Saf     Country:  United States    
Other Details:
Languages:  eng     Pagination:  56-61     Citation Subset:  IM    
Safety and Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK.
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MeSH Terms
Algae / drug effects*
Chlorella / drug effects,  growth & development
Scenedesmus / drug effects
Toxicity Tests
Trichloroacetic Acid / toxicity*
Water Pollutants, Chemical / toxicity*
Reg. No./Substance:
0/Water Pollutants, Chemical; 76-03-9/Trichloroacetic Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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