Jacqueline MacDonald GibsonUniversity of North Carolina at Chapel Hill | UNC · Department of Environmental Sciences and Engineering
Jacqueline MacDonald Gibson
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Citations since 2017
21 Research Items
Technological limitations, cost uncertainties, regulatory disputes, environmental issues, and public safety concerns plague the transfer of military bases to civilian control says Jacqueline Macdonald. She describes how and why the presence of unexploded ordnance is making military base closures difficult and is creating complex safety and environm...
In the 20 years since cleanup of contaminated groundwater has been a high priority in the United States, recognition of both the scope of the problem and the technical difficulties involved has grown steadily Estimates of the number of hazardous waste sites where groundwater may be contaminated vary between 300,000 and 400,000 nationwide [NRC, 1994...
The National Research Council has issued the first comprehensive assessment of when natural attenuation works.
The kinetics of plasmid conjugation for the TOL and RP4 plasmids depend strongly on the donor cells' specific growth rate and substrate concentration, both of which determine the cells' energy availability. Although transfer rates can be large when energy availability is high, normal biological processes have low energy availability. Therefore, we...
More than five decades after the Civil Rights Act, systematic exclusion of African-American neighborhoods on the fringes of cities and towns from municipal services, including water service, continues. Throughout the American South, many such neighborhoods still rely on unregulated private wells for their drinking water despite their close proximity to municipal water lines. Little is known about water quality, including lead contamination, in these communities. Method: Kitchen tap water samples were collected and tested for lead in 29 households recruited from peri-urban African-American communities in Wake County, North Carolina, relying on private wells. The Integrated Exposure Uptake Biokinetic (IEUBK) Model for Lead in Children was used to estimate blood lead levels in children resulting from lead in water. Results: In eight (28%) of the 29 households, tap water lead exceeded the 15-ppb health-based action level in at least one of two samples. In seven homes, the average lead in two samples exceeded 15 ppb. The IEUBK model predicts that in 3 (10%) of the households, water lead could elevate children’s blood lead above the current 5 µg/dL reference level. Discussion: The lead prevalence in households in this study was comparable to that in the most-exposed neighborhoods of Flint, Michigan, during the recent lead-in-water crisis. These results indicate the need for interventions to decrease lead exposure in peri-urban African American communities excluded from nearby municipal water service.