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Title: Bioavailability-Based In Situ Remediation To Meet Future Lead (Pb) Standards in Urban Soils and Gardens

Journal Article · · Environmental Science and Technology
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9]
  1. National Inst. of Environmental Health Sciences, Research Triangle Park, NC (United States). Hazardous Substances Research Branch
  2. MDB, Inc., Durham, NC (United States)
  3. Univ. of Peradeniya (Sri Lanka). Dept. of Soil Science
  4. The Ohio State Univ., Columbus, OH (United States). School of Environment and Natural Resources
  5. Brooklyn College of The City Univ. of New York, NY (United States)
  6. Kansas State Univ., Manhattan, KS (United States). Dept. of Agronomy
  7. US Environmental Protection Agency (EPA) Region 2, New York, NY (United States)
  8. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biosciences Division
  9. US Environmental Protection Agency (EPA), Cincinnati, OH (United States). National Risk Management Research Lab.

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 study 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. Finally, 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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Inst. of Environmental Health Sciences (NIEHS) (United States); Dept. of Defense (United States); USEPA; Kansas Agricultural Experimental Station (United States)
Grant/Contract Number:
AC05-00OR22725; 14-296-J
OSTI ID:
1265580
Journal Information:
Environmental Science and Technology, Vol. 49, Issue 15; ISSN 0013-936X
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 70 works
Citation information provided by
Web of Science

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Cited By (10)

Subcellular Compartmentalization and Chemical Forms of Lead Participate in Lead Tolerance of Robinia pseudoacacia L. with Funneliformis mosseae journal April 2017
Microbial strategy for potential lead remediation: a review study journal January 2017
Suppression of the environmental risks of lead in cropland soil using biomass ash and its modified product journal January 2019
Bioavailability of lead-contaminated soils in a tropical environment: Jamaica journal December 2019
Soil Washing Optimization, Recycling of the Solution, and Ecotoxicity Assessment for the Remediation of Pb-Contaminated Sites Using EDDS journal February 2018
Remediation of heavy metal contamination of sediments and soils using ligand-coated dense nanoparticles journal September 2020
A transcribed ultraconserved noncoding RNA, Uc.173, is a key molecule for the inhibition of lead-induced neuronal apoptosis journal December 2015
Phosphorus‐Rich Biochars Can Transform Lead in an Urban Contaminated Soil journal January 2019
Oxalate-enhanced solubility of lead (Pb) in the presence of phosphate: pH control on mineral precipitation journal January 2019
Lead (Pb) Bioaccessibility and Mobility Assessment of Urban Soils and Composts: Fingerprinting Sources and Refining Risks to Support Urban Agriculture journal December 2017

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