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https://hdl.handle.net/2440/102955
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Type: | Journal article |
Title: | Bioavailability-based In situ remediation to meet future lead (Pb) standards in urban soils and gardens |
Author: | Henry, H. Naujokas, M. Attanayake, C. Basta, N. Cheng, Z. Hettiarachchi, G. Maddaloni, M. Schadt, C. Scheckel, K. |
Citation: | Environmental Science and Technology (Washington), 2015; 49(15):8948-8958 |
Publisher: | American Chemical Society |
Issue Date: | 2015 |
ISSN: | 0013-936X 1520-5851 |
Statement of Responsibility: | Heather Henry, Marisa F. Naujokas, Chammi Attanayake, Nicholas T. Basta, Zhongqi Cheng, Ganga M. Hettiarachchi, Mark Maddaloni, Christopher Schadt, and Kirk G. Scheckel |
Abstract: | Recently the Centers for Disease Control and Prevention lowered the blood Pb reference value to 5 μg/dL. The lower reference value combined with increased repurposing of postindustrial lands are heightening concerns and driving interest in reducing soil Pb exposures. As a result, regulatory decision makers may lower residential soil screening levels (SSLs), used in setting Pb cleanup levels, to levels that may be difficult to achieve, especially in urban areas. This paper discusses challenges in remediation and bioavailability assessments of Pb in urban soils in the context of lower SSLs and identifies research needs to better address those challenges. Although in situ remediation with phosphate amendments is a viable option, the scope of the problem and conditions in urban settings may necessitate that SSLs be based on bioavailable rather than total Pb concentrations. However, variability in soil composition can influence bioavailability testing and soil amendment effectiveness. More data are urgently needed to better understand this variability and increase confidence in using these approaches in risk-based decision making, particularly in urban areas. |
Keywords: | Humans Phosphates Lead Soil Soil Pollutants Reproducibility of Results Decision Making Cities Environmental Pollution Biological Availability Agriculture Environmental Restoration and Remediation |
Rights: | © 2015 American Chemical Society |
DOI: | 10.1021/acs.est.5b01693 |
Published version: | http://dx.doi.org/10.1021/acs.est.5b01693 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 3 |
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