Mass balance on surface-bound, mineralogic, and total lead concentrations as related to industrial aggregate bioaccessibility

Article Abstract:

Increasing concerns on lead (Pb) bioavailability and its risks to humans have raised interest on the speciation and immobilization of Pb-bearing phases. Previous research has focused only on the solubility of the mineralogic fraction. A current research study, which aimed at investigating the potential for surface-bound (sorbed) Pb to contribute to the bioavailable fraction, shows that there is low bioaccessibility of Pb in modern aggregate compared to urban Cincinnati soils and street dusts.

Research and Development in the Physical, Engineering, and Life Sciences, Pollution R&D NEC, Lead, Environmental aspects, Soil pollution, Pollution control research

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Estimation of lead and arsenic bioavailability using a physiologically based extraction test

Article Abstract:

The use of the physiologically based extraction test (PBET) for estimating lead and arsenic bioavailability was investigated. The results showed that in the case of lead, PBET estimates were linearly correlated with that obtained with the Sprague-Dawley rat model. For arsenic, however, PBET results overpredicted bioavailability study results in rabbit and primate models.

Analysis, Measurement, Soil analysis, Bioavailability

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A risk-based approach to soil remediation modeling

Article Abstract:

A new soil remediation modeling technique offers improved cost efficiency while maintaining the ability to meet basic human health protection standards. The technique, which prevents the over-remediation of sites, makes use of iterative fate and transport modeling to determine the most efficient levels of remediation.

Models, Hazardous substances, Hazardous substances risk assessment, Soil disinfection

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