| Evaluation of ionic contribution to the toxicity of a coal-mine effluent using Ceriodaphnia dubia. | |
| | |
MedLine Citation:
|
PMID: 16001150 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The United States Environmental Protection Agency has defined national in-stream water-quality criteria (WQC) for 157 pollutants. No WQC to protect aquatic life exist for total dissolved solids (TDS). Some water-treatment processes (e.g., pH modifications) discharge wastewaters of potentially adverse TDS into freshwater systems. Strong correlations between specific conductivity, a TDS surrogate, and several biotic indices in a previous study suggested that TDS caused by a coal-mine effluent was the primary stressor. Further acute and chronic testing in the current study with Ceriodaphnia dubia in laboratory-manipulated media indicated that the majority of the effluent toxicity could be attributed to the most abundant ions in the discharge, sodium (1952 mg/L) and/or sulfate (3672 mg/L), although the hardness of the effluent (792 +/- 43 mg/L as CaCO3) ameliorated some toxicity. Based on laboratory testing of several effluent-mimicking media, sodium- and sulfate-dominated TDS was acutely toxic at approximately 7000 microS/cm (5143 mg TDS/L), and chronic toxicity occurred at approximately 3200 microS/cm (2331 mg TDS/L). At a lower hardness (88 mg/L as CaCO3), acute and chronic toxicity end-points were decreased to approximately 5000 microS/cm (3663 mg TDS/L) and approximately 2000 microS/cm (1443 mg TDS/L), respectively. Point-source discharges causing in-stream TDS concentrations to exceed these levels may risk impairment to aquatic life. |
| | |
Authors:
|
A J Kennedy; D S Cherry; C E Zipper |
Publication Detail:
|
Type: Journal Article Date: 2005-07-06 |
Journal Detail:
|
Title: Archives of environmental contamination and toxicology Volume: 49 ISSN: 0090-4341 ISO Abbreviation: Arch. Environ. Contam. Toxicol. Publication Date: 2005 Aug |
Date Detail:
|
Created Date: 2005-09-15 Completed Date: 2005-10-20 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0357245 Medline TA: Arch Environ Contam Toxicol Country: United States |
Other Details:
|
Languages: eng Pagination: 155-62 Citation Subset: IM |
Affiliation:
|
Department of Biology, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA. alan.j.kennedy@erdc.us-ace.army.mil |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Chlorine / toxicity Coal Mining* Daphnia / drug effects*, growth & development Fresh Water / chemistry* Ions / toxicity* Sodium / toxicity Solutions Sulfates / toxicity Toxicity Tests / methods* Water Pollutants, Chemical / toxicity* |
| Chemical | |
Reg. No./Substance:
|
0/Ions; 0/Solutions; 0/Sulfates; 0/Water Pollutants, Chemical; 7440-23-5/Sodium; 7782-50-5/Chlorine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: A short-term sublethal in situ sediment assay with Chironomus riparius based on postexposure feeding...
Next Document: Effects of dietary administration of CL-20 on Japanese quail Coturnix coturnix japonica.