Accession Number : ADA258270


Title :   Use of Daphnia Magna to Assess Potentially Contaminated Buildings.


Descriptive Note : Final rept. Apr 90-Mar 91,


Corporate Author : CHEMICAL RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUND MD


Personal Author(s) : Haley, M V ; Kurnas, C W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258270.pdf


Report Date : Jun 1992


Pagination or Media Count : 25


Abstract : Random concrete core samples taken from a loading dock were used in determining the toxicity of concrete to Daphnia magna. The cores were ground to powder and analyzed for volatiles and chemical agents before being subjected to aquatic toxicology studies using Daphnia magna. Particle size, pH, and ion exchange mechanisms were investigated as par of methodology development. No effects were observed in daphnia exposed to concrete concentrations up to 4000 mg/L after the pH was adjusted. It was determined that an ion exchange reaction between sodium bicarbonate and concrete caused the water hardness to drop. Concrete spiked with sodium lauryl sulfate, copper sulfate, and Beta- aminoethylarylthiosulfonate were investigated to determine if concrete would alter the toxicity. The resulting EC50s were 17.2, 1.42, and 17.3 mg/L, respectively. The copper sulfate toxicity was reduced by two orders of magnitude. The changes in sodium lauryl sulfate and Beta- aminoethylarylthiosulfonate were not significant.


Descriptors :   *TOXICITY , *BUILDINGS , *CONCRETE , *ION EXCHANGE , *CRUSTACEA , *BICARBONATES , *DAPHNIA , *PH FACTOR , PARTICLE SIZE , EXCHANGE REACTIONS , SULFATES , COPPER , SODIUM , CORES , CHEMICALS


Subject Categories : Toxicology
      Inorganic Chemistry
      Construction Equipment, Materials & Supplies
      Safety Engineering


Distribution Statement : APPROVED FOR PUBLIC RELEASE