SYMPOSIA PAPER Published: 01 January 1985
STP36281S

A Model for Predicting the Influence of Suspended Sediments on the Bioavailability of Neutral Organic Chemicals in the Water Compartment

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Site-specific water quality criteria may evolve from national water quality criteria based on site water characteristics. Suspended solids may be an important modifying parameter. A model is presented relating suspended solids characteristics (organic carbon content and suspended solids concentration) with a neutral organic chemical's sorption coefficient. Investigation of case studies with acenaphthene, dieldrin, and chrysene shows the dissolved and particulate-bound fractions (Cd and Cp) of total chemical concentration (Ct) to be dependent upon these factors. The model may be used to predict Cp and Cd in site waters. The model shows that chemicals with low Kp values in the presence of low suspended solids concentrations and organic matter are relatively unaffected by suspended solids. Conversely, chemicals with high Kp values, high suspended solids concentrations, and organic matter would be primarily sorbed to suspended solids.

Author Information

Staples, CA
Monsanto Company, St. Louis, Mo
Dickson, KL
North Texas State University, Denton, Tex
Rodgers, JH
North Texas State University, Denton, Tex
Saleh, FY
North Texas State University, Denton, Tex
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Details
Developed by Committee: E47
Pages: 417–428
DOI: 10.1520/STP36281S
ISBN-EB: 978-0-8031-4922-9
ISBN-13: 978-0-8031-0410-5