Relationship Between Water Solubility, Soil Sorption, Octanol-Water Partitioning, and Concentration of Chemicals in Biota

Abstract

There is a need for a method of preliminary estimation of bioconcentration factors in fish and soil sorption coefficients for chemicals. A data base was assembled for 170 compounds having average values for these two parameters and also average values for water solubility and n-octanol-water partition coefficients. Binary regression equations between the logarithms of these values gave correlation coefficients that were all significant below the 1 percent level. Using these equations, measured average values for any of the four parameters could be used to estimate average values for the unmeasured parameters. The 95 percent confidence limits for the calculated values were about ±1 to 3 orders of magnitude of the measured values. The relatively large variation of the actual from the predicted values was due both to the variation in the type of methodology used to make the measurements and also to the intrinsic variation in values attributable to the nature of the chemicals, the characteristics of the soils and fish, and the environmental conditions employed in the studies. Much less variation between actual and predicted values has been achieved when more uniform methodology is adopted for measuring these parameters. Despite the variability, the data are useful for early assessment of the potential for bioconcentration and mobility in the environment. Knowledge of the two factors is needed for hazard assessment in the environment. Bioconcentration factor values for Daphnia appear to be as valid for correlation purposes as those for fish.

Modeling and Risk Analysis of Nonpoint-Source Pollution Caused by Atrazine Using Swat

“…However, Koc is not available for all pesticides and can be computed using the relationship with water solubility (WS), proposed by Kenaga and Goring (1980), which is reliable for pesticides with solubility between 100 to 300 mg/L:…”

Environmental fate and transport of chemical signatures from buried landmines -- Screening model formulation and initial simulations

“…Most environmental research has explored the liquid-solid partitioning due to concerns regarding aquifer contamination and the assumption that soil particles are almost always coated with an aqueous film (Kenaga and Goring, 1980). However, with agricultural soil fumigation, researchers have found that volatilization of applied organic chemical pesticides is prevented by dry surface soils.…”

Solubility of 238U radionuclide from various types of soil in synthetic gastrointestinal fluids using “US in vitro” digestion method

“…The concentration of 238 U radionuclide depends on the quantity of the soil samples intake, volume of gastric fluid and intestinal fluid. The solubility of 238 U radionuclide also shows that the amount of 238 U radionuclide can be dissolved in gastrointestinal fluids and it shows the correlation between concentration and solubility [16]. According to US EPA [17], the average person ingests about 2 μg of uranium in food and water every day, but only a very small fraction of 1% or 2% is absorbed into the body.…”