A microcosm study of lindane and naphthalene for model validation

Conference · Thu Oct 01 00:00:00 EDT 1981 · Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)

OSTI ID:6433066

Staples, C A; Dickson, K L; Rodgers, J H; Saleh, F Y

Lindane and naphthalene were used in a series of flow-through microcosms to validate predictions of two environmental fate models--the exposure analysis modeling system (EXAMS) and simplified lake and stream analysis (SLSA). The microcosms' physical transport characteristics were carefully measured and used as input parameters to the models, along with laboratory data on lindane and naphthalene rate constants and coefficients. The results show that both models accurately predict the chemicals' concentrations in the water compartment. Observed concentrations in the sediments were two to three orders of magnitude lower than the models' predictions, even though the overall mass balance accounted for about 90% of the chemicals' input. Lack of agreement between observed and predicted sediment concentrations may be attributed to the variability of the sediment partition coefficient values, the slow rate of sediment loading, vertical stratification of the chemicals in the sediment, and microbial degradation of the chemicals in the sediment.

• Research Organization: North Texas State Univ., Denton, TX
• OSTI ID: 6433066
• Report Number(s): CONF-8110103-
• Journal Information: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States), Vol. STP-802; Conference: American Society of Testing and Materials symposium on aquatic toxicology, St Louis, MO, USA, 15 Oct 1981
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
LAKES
WATER POLLUTION
LINDANE
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL TRANSPORT
MICROCOSMS
BIOLOGICAL EFFECTS
NAPHTHALENE
STREAMS
BIODEGRADATION
BIOLOGICAL MODELS
SEDIMENT-WATER INTERFACES
SEDIMENTS
VALIDATION
AROMATICS
CHEMICAL REACTIONS
CHLORINATED ALICYCLIC HYDROCARBONS
CONDENSED AROMATICS
DECOMPOSITION
HALOGENATED ALICYCLIC HYDROCARBONS
HYDROCARBONS
INSECTICIDES
INTERFACES
MASS TRANSFER
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PESTICIDES
POLLUTION
SURFACE WATERS
TESTING
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)
560300 - Chemicals Metabolism & Toxicology