Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Edward N. Leonard"'
Autor:
David R. Mount, Timothy D. Dawson, J. Russell Hockett, Terry L. Highland, Kevin G. Lott, Russell J. Erickson, Vincent R. Mattson, Edward N. Leonard
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 67:1816-1826
The effects of diet-borne copper, cadmium, lead, and arsenic on juvenile fish were evaluated using a live diet consisting of the oligochaete Lumbriculus variegatus . In 30 d exposures, no effects were observed on the growth and survival of rainbow tr
Publikováno v:
Environmental Toxicology and Chemistry. 22:886-889
After exposure for 21 d to sediment spiked with Cd, Pb, Cu, or Zn, oligochaetes (Lumbriculus variegatus) held in clean water depurated metal rapidly over the first few hours but much more slowly from 8 h up to 32 h. Results are consistent with previo
Publikováno v:
Environmental Toxicology and Chemistry. 18:858-864
Acid volatile sulfide (AVS) is a component of sediments that complexes some cationic metals and thereby influences the toxicity of these metals to benthic organisms. Experimental manipulation of AVS in metal-contaminated sediments may provide a means
Publikováno v:
Environmental Toxicology and Chemistry. 17:2310-2317
Techniques for reducing ammonia toxicity in freshwater sediments were investigated as part of a project to develop toxicity identification and evaluation (TIE) procedures for whole sediments. Although ammonia is a natural constituent of freshwater se
Publikováno v:
Environmental Toxicology and Chemistry. 15:2221-2232
Surficial sediments collected from Lake Michigan (N = 46) and the Virginian Province of the east coast of the U.S. (N = 131) by the Environmental Monitoring and Assessment Program (EMAP) of the U.S. Environmental Protection Agency (EPA) were evaluate
Publikováno v:
Environmental Toxicology and Chemistry. 15:2147-2155
Recent studies have demonstrated the role of acid-volatile sulfide (AVS) in controlling the bioavailability of several cationic metals in anoxic sediments. However, metal-sulfide complexes can be relatively labile with respect to oxidation associated
Publikováno v:
Environmental Toxicology and Chemistry. 15:2102-2112
The development of sediment quality criteria for the cationic metals cadmium, copper, lead, nickel, and zinc has focused on the use of acid-volatile sulfide (AVS) as the primary normalization phase for predicting interstitial pore-water concentration
Publikováno v:
Environmental Toxicology and Chemistry. 15:181-193
The effects of various water chemistry parameters on the toxicity of copper to larval fathead minnows were investigated. Increased pH, hardness, sodium, dissolved organic matter, and suspended solids each caused toxicity to decrease on the basis of t
Publikováno v:
Archives of Environmental Contamination and Toxicology. 28:78-84
The effects of oxidative processes on acid volatile sulfide (AVS) concentrations in various horizons of whole sediment cores were evaluated in relation to the toxicity of a metal (cadmium). An artificial system was used to “age” cadmium-spiked se
Publikováno v:
Water Research. 28:1071-1076
Short-term tests with benthic species have shown that certain cationic metals (cadmium, nickel, lead, zinc, copper) in sediments are not bioavailable when acid volatile sulfide (AVS) concentrations are sufficient to bind the metals, and/or when conce