Bioavailability of Contaminants in Soils and Sediments: by National Research Council (U. S.) Commit

By National Research Council (U. S.) Commit

Bioavailability refers back to the volume to which people and ecological receptors are uncovered to contaminants in soil or sediment. the concept that of bioavailability has lately piqued the curiosity of the unsafe waste as a major attention in figuring out how a lot waste to scrub up. the explanation is if contaminants in soil and sediment usually are not bioavailable, then extra contaminant mass could be left in position with out growing extra threat. a brand new NRC record notes that the opportunity of the honour of bioavailability to persuade decision-making is maximum the place definite chemical, environmental, and regulatory components align. the present use of bioavailability in threat evaluation and unsafe waste cleanup rules is demystified, and appropriate instruments and versions for bioavailability overview are mentioned and ranked based on seven standards. eventually, the intimate hyperlink among bioavailability and bioremediation is explored. The document concludes with feedback for relocating bioavailability ahead within the regulatory enviornment for either soil and sediment cleanup.

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Extra resources for Bioavailability of Contaminants in Soils and Sediments: Processes, Tools, and Applications

Example text

The Electric Power Research Institute (1983, 1993) has conducted a substantial amount of the research associated with these materials, including development of geochemical models for predicting leaching and transport behavior of the metals in ash. These recent assessments include evaluations of exposure to ecological receptors and incorporate bioavailability processes as reflected by biological uptake factors. S. Environmental Protection Agency (EPA) regulations concerning the beneficial use of biosolids, which are the residual materials generated by municipal wastewater treatment and applied to land for their fertilizer value.

Increase in body burden of contaminants through the food web) (described in greater detail in Chapter 3). The science of ecological risk assessment has grown with extensive research on many bioavailability processes, such as transport of chemicals in the environment and environmental modeling. The number of factors that may alter exposure assessments is enormous, including species-specific criteria, interactions between competing organisms, ecosystem structure, interactions among communities of organisms, and other factors not specifically considered in human health risk assessment.

1 Introduction For the last 30 years, the nation has been trying to assess, remediate, and otherwise manage thousand of acres of soil and sediment1 contaminated with chemicals produced during the industrial age. Of primary concern has been the risk that these contaminated media pose to humans and ecological receptors. Evaluation of exposure is a key component of chemical risk assessment, and understanding the factors that influence exposure enables decision-makers to develop solutions for addressing environmental contamination.

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