The Acute, Aquatic Toxicity of Selected Mineral Particles

Abstract

Graphite fibers, nickel-graphite fibers, polycrystalline iron whiskers, and graphite Mirco-260 (M-260) were tested to determine their toxicities to Daphnia magna. The graphite fibers and nickel-graphite fibers were ground with a mortar and pestle before testing. The M-260 had an EC50 of 80.6 mg/L for four pooled replicates. None of the other compounds caused any deaths at concentrations up to 100 mg/L. All the bioassays were 48-hr acute studies. A 96-hr growth inhibition assay using Ankistrodesmus falcatus was performed with the graphite. No inhibition of A. falcatus was observed; however, the growth of the alga was enhanced by the two lowest test concentrations. Keywords: Graphite; Nickel-graphic; Bioassay; Daphnia magna; Ankistrodemus falcatus; Toxicity.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1988
Accession Number
ADA203535

Entities

People

  • Dennis W. Johnson
  • Wayne G. Landis

Organizations

  • Edgewood Chemical Biological Center

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Availability
  • Bioassay
  • Classification
  • Engineering
  • Environmental Protection
  • Governments
  • Graphitic Materials
  • Inhibition
  • Maryland
  • Materials
  • Particle Size
  • Particles
  • Polycrystals
  • Public Health
  • Security
  • Toxicity
  • United States

Readers

  • Aquatic Ecology
  • Reinforced Composite Materials
  • Toxicology/Environmental Toxicology