Over the last decade we have gained a detailed understanding of the static geochemical characteristics of arsenic and manganese contaminated aquifers and have characterized the rapid response of sediment to artificial chemical perturbations in incubation experiments. However, remarkably little is known about the basic aspects of hydrogeology that are vital for understanding the evolution of groundwater chemistry along flow paths that are contaminated by these metals. We do not know how the solute fluxes that drive manganese and arsenic mobility enter the aquifer, what patterns groundwater flow follows, or how solutes mix across different flow paths. Little is known about deeper groundwater flow, and basic issues such as the significance of regional flow and groundwater pumping are still controversial. In the proposed research, we will combine networks of sensors and geophysical imaging techniques with three-dimensional groundwater flow and transport models to characterized changing subsurface conditions. We will observe how subsurface conditions may be altered by installation of community supply wells, the most common approach to providing safe water, and we will develop predictive models for future shifts in groundwater chemistry. Our results will provide insight into the processes that cause metal mobilization from sediments, and will enable better management of contaminated groundwater.
This project will address critical issues of toxic metals and how humans are exposed. We will address how human activity alters metal solubility in drinking water, how communities can monitor changes in hydrogeology that will change concentrations of toxic metals in drinking water and whether deep wells are an effective intervention to reduce toxic metal exposure.
|Burris, Heather H; Baccarelli, Andrea A; Motta, Valeria et al. (2014) Association between length of gestation and cervical DNA methylation of PTGER2 and LINE 1-HS. Epigenetics 9:1083-91|
|Kile, Molly L; Rodrigues, Ema G; Mazumdar, Maitreyi et al. (2014) A prospective cohort study of the association between drinking water arsenic exposure and self-reported maternal health symptoms during pregnancy in Bangladesh. Environ Health 13:29|
|Claus Henn, Birgit; Coull, Brent A; Wright, Robert O (2014) Chemical mixtures and children's health. Curr Opin Pediatr 26:223-9|
|Kile, Molly L; Houseman, E Andres; Baccarelli, Andrea A et al. (2014) Effect of prenatal arsenic exposure on DNA methylation and leukocyte subpopulations in cord blood. Epigenetics 9:774-82|
|Gleason, Kelsey; Shine, James P; Shobnam, Nadia et al. (2014) Contaminated turmeric is a potential source of lead exposure for children in rural Bangladesh. J Environ Public Health 2014:730636|
|Karwowski, Mateusz P; Just, Allan C; Bellinger, David C et al. (2014) Maternal iron metabolism gene variants modify umbilical cord blood lead levels by gene-environment interaction: a birth cohort study. Environ Health 13:77|
|Braun, Joseph M; Wright, Rosalind J; Just, Allan C et al. (2014) Relationships between lead biomarkers and diurnal salivary cortisol indices in pregnant women from Mexico City: a cross-sectional study. Environ Health 13:50|
|Fossati, Serena; Baccarelli, Andrea; Zanobetti, Antonella et al. (2014) Ambient particulate air pollution and microRNAs in elderly men. Epidemiology 25:68-78|
|Lee, Seunggeung; Abecasis, Gonçalo R; Boehnke, Michael et al. (2014) Rare-variant association analysis: study designs and statistical tests. Am J Hum Genet 95:5-23|
|Orenstein, Sara T C; Thurston, Sally W; Bellinger, David C et al. (2014) Prenatal organochlorine and methylmercury exposure and memory and learning in school-age children in communities near the New Bedford Harbor Superfund site, Massachusetts. Environ Health Perspect 122:1253-9|
Showing the most recent 10 out of 30 publications