Toxicity and bioavailability of heavy metal mixtures in natural and synthetic sediments
Abstract
Toxicity tests were conducted to compare differences in bioavailability of a metal mixture (zinc, copper, cadmium and lead) in natural and synthetic sediments to Chironomus tentans and Ceriodaphnia dubia. Preliminary tests were conducted with sediment collected at five stations from the Arkansas River (Leadville, CO) and one from the La Cache Poudre River (Fort Collins, CO). After seven days of exposure, mortality on C. tentans in sediment from the most contaminated station (AR3) was significantly different from the reference station (PDR). Bioaccumulation in these insects showed significant correlation with abiotic factors: particle size, organic matter, total carbon and cation exchange capacity. During a second experiment, particle size and carbon contents of synthetic sediment were modified to reflect composition of natural sediment. Two types of artificial sediments were spiked with 0X, 0.085X, 0.175X and 0.35X of metal mixture measured in AR3. After ten days, mortality of C. tentans in the 0.35X and AR3 treatments were similar. In a final experiment, synthetic and natural sediments were spiked at 0X, 0.175X, 0.35X, and 0.70X. Again, mortality of contents in 0.35X and AR3 were not significantly different. A 48hrs-acute test conducted with C. dubia showed that interstitial water from AR3 and AR5 stations hadmore »
- Authors:
-
- Colorado State Univ., Fort Collins, CO (United States). Dept. of Fishery and Wildlife Biology
- Publication Date:
- OSTI Identifier:
- 37397
- Report Number(s):
- CONF-9410273-
TRN: IM9519%%321
- Resource Type:
- Conference
- Resource Relation:
- Conference: 15. annual meeting of the Society of Environmental Toxicology and Chemistry (SETAC), Denver, CO (United States), 30 Oct - 3 Nov 1994; Other Information: PBD: 1994; Related Information: Is Part Of Society of Environmental Toxicology and Chemistry 15th annual meeting: Abstract book. Ecological risk: Science, policy, law, and perception; PB: 286 p.
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; 56 BIOLOGY AND MEDICINE, APPLIED STUDIES; COLORADO; WATER POLLUTION; RIVERS; ZINC; BIOLOGICAL AVAILABILITY; COPPER; CADMIUM; LEAD; FLIES; SENSITIVITY; CRUSTACEANS; SEDIMENTS; CONTAMINATION; ECOLOGICAL CONCENTRATION
Citation Formats
Frugis, M, and Clements, W H. Toxicity and bioavailability of heavy metal mixtures in natural and synthetic sediments. United States: N. p., 1994.
Web.
Frugis, M, & Clements, W H. Toxicity and bioavailability of heavy metal mixtures in natural and synthetic sediments. United States.
Frugis, M, and Clements, W H. 1994.
"Toxicity and bioavailability of heavy metal mixtures in natural and synthetic sediments". United States.
@article{osti_37397,
title = {Toxicity and bioavailability of heavy metal mixtures in natural and synthetic sediments},
author = {Frugis, M and Clements, W H},
abstractNote = {Toxicity tests were conducted to compare differences in bioavailability of a metal mixture (zinc, copper, cadmium and lead) in natural and synthetic sediments to Chironomus tentans and Ceriodaphnia dubia. Preliminary tests were conducted with sediment collected at five stations from the Arkansas River (Leadville, CO) and one from the La Cache Poudre River (Fort Collins, CO). After seven days of exposure, mortality on C. tentans in sediment from the most contaminated station (AR3) was significantly different from the reference station (PDR). Bioaccumulation in these insects showed significant correlation with abiotic factors: particle size, organic matter, total carbon and cation exchange capacity. During a second experiment, particle size and carbon contents of synthetic sediment were modified to reflect composition of natural sediment. Two types of artificial sediments were spiked with 0X, 0.085X, 0.175X and 0.35X of metal mixture measured in AR3. After ten days, mortality of C. tentans in the 0.35X and AR3 treatments were similar. In a final experiment, synthetic and natural sediments were spiked at 0X, 0.175X, 0.35X, and 0.70X. Again, mortality of contents in 0.35X and AR3 were not significantly different. A 48hrs-acute test conducted with C. dubia showed that interstitial water from AR3 and AR5 stations had higher toxicity than other stations. In addition, toxicity of interstitial water from synthetic sediment was greater than from spiked natural sediment or sediments collected from the Arkansas River. These results indicate that heavy metals are more bioavailable in synthetic sediments than in natural substrates.},
doi = {},
url = {https://www.osti.gov/biblio/37397},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Dec 31 00:00:00 EST 1994},
month = {Sat Dec 31 00:00:00 EST 1994}
}