The objective of Project 4 is to determine the principal fate and transport processes for the release, mobility, persistence, and possible pathways of mixtures of organic contaminants toward potential exposures and/or remediation zones in karst groundwater systems. The Project will use Di(2-ethylhexyl) phthalate (DEHP) as a model semipolar organic and trichloroethylene (TCE) as a model nonpolar organic. The project will determine the major mechanisms influencing the fate and transport of DEHP and TCE in karst groundwater characterized by variable conduit and/or diffusion dominated flow;assess the effect of trapped and mobile non-aqueous TCE on the fate and transport of dissolved DEHP;assess potential contamination pathways and exposure through the karstic groundwater system in northern Puerto Rico;and explore the mechanisms for potential release and leaching of DEHP contaminants from unlined landfills into karst groundwater systems. Specific alms will be attained through defined experimental activities, which Involve data evaluation and integration at the hydrogeophysical system level and physical modeling of potential contaminant sources and fate and transport processes at the laboratory-scale level.
The research will Improve the ability for assessing the migration of contaminants in karstic ground-water systems, and, ultimately, predict and minimize the potential for exposure of these pollutants to humans and ecosystems. With the gained knowledge, accurate methods can be developed to predict potential human exposure and effective strategies can be established to protect public health and the environment. In the United States, 40% of groundwater used for drinking comes from karst aquifers.
|Ferguson, Kelly K; Cantonwine, David E; McElrath, Thomas F et al. (2016) Repeated measures analysis of associations between urinary bisphenol-A concentrations and biomarkers of inflammation and oxidative stress in pregnancy. Reprod Toxicol 66:93-98|
|Li, Dan; Zeng, Siyu; He, Miao et al. (2016) Water Disinfection Byproducts Induce Antibiotic Resistance-Role of Environmental Pollutants in Resistance Phenomena. Environ Sci Technol 50:3193-201|
|Ferguson, Kelly K; Meeker, John D; Cantonwine, David E et al. (2016) Urinary phthalate metabolite and bisphenol A associations with ultrasound and delivery indices of fetal growth. Environ Int 94:531-7|
|Rajic, Ljiljana; Nazari, Roya; Fallahpour, Noushin et al. (2016) Electrochemical degradation of trichloroethylene in aqueous solution by bipolar graphite electrodes. J Environ Chem Eng 4:197-202|
|Rajic, Ljiljana; Fallahpour, Noushin; Podlaha, Elizabeth et al. (2016) The influence of cathode material on electrochemical degradation of trichloroethylene in aqueous solution. Chemosphere 147:98-104|
|McIntosh, Scott; PÃ©rez-Ramos, JosÃ©; Demment, Margaret M et al. (2016) Development and Implementation of Culturally Tailored Offline Mobile Health Surveys. JMIR Public Health Surveill 2:e28|
|Watkins, Deborah J; Fortenberry, Gamola Z; SÃ¡nchez, Brisa N et al. (2016) Urinary 3-phenoxybenzoic acid (3-PBA) levels among pregnant women in Mexico City: Distribution and relationships with child neurodevelopment. Environ Res 147:307-13|
|Tan, Wenbing; Zhang, Yuan; He, Xiaosong et al. (2016) Distribution patterns of phthalic acid esters in soil particle-size fractions determine biouptake in soil-cereal crop systems. Sci Rep 6:31987|
|Johns, Lauren E; Ferguson, Kelly K; Meeker, John D (2016) Relationships Between Urinary Phthalate Metabolite and Bisphenol A Concentrations and Vitamin D Levels in U.S. Adults: National Health and Nutrition Examination Survey (NHANES), 2005-2010. J Clin Endocrinol Metab 101:4062-4069|
|Shao, Gang; MacNeil, Michael; Yao, Yuanyuan et al. (2016) Porous extraction paddle: a solid phase extraction technique for studying the urine metabolome. Rapid Commun Mass Spectrom :|
Showing the most recent 10 out of 116 publications