Accession Number:

ADA434428

Title:

Risk of Pore Water Hydrogen Sulfide Toxicity in Dredged Material Bioassays

Descriptive Note:

Final rept.

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

Personal Author(s):

Report Date:

1995-11-01

Pagination or Media Count:

39.0

Abstract:

Generally, hydrogen sulfide is not treated as a contaminant of concern in the regulatory evaluation of dredged material since it undergoes rapid oxidation and dilution during dredging and disposal. However, because dredged material is evaluated using effects-based testing i.e., whole sediment and elutriate toxicity tests, there is the potential for H2S to exert toxicity and confound the regulatory decision-making process. To evaluate the potential for hydrogen sulfide toxicity in dredged material bioassays, a literature review and survey to U.S. Army Corps of Engineers Divisions and Districts were conducted. Data included a reported environmental pore water exposure concentrations of hydrogen sulfide and b effects concentrations shown to cause toxicity in laboratory studies with aquatic species. While the majority 60 percent of reported environmental pore water concentrations were 100 micronMeter H2S1, almost all 90 percent of reported effects were found at concentrations 400 micronMeter HzS1. This simple comparison of reported exposure and effects concentrations suggests that there is a strong Potential for hydrogen sulfide toxicity in dredged material bioassays. However, a number of biases in this limited data set are discussed that must be considered before any definitive conclusions can be drawn.

Subject Categories:

  • Toxicology
  • Inorganic Chemistry
  • Hydrology, Limnology and Potamology
  • Solid Wastes and Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE