*Applications may be reviewed on a rolling-basis and this posting could close before the deadline. Click here for information about the selection process.EPA Office/Lab and Location: One research opportunity is available at the Environmental Protection Agency (EPA), Office of Research and Development (ORD), Center for Environmental Measurement and Modeling (CEMM), Immediate Office (IO) located in Athens, Georgia.Research Project: This research opportunity will focus on environmental transformations of nanomaterials, plastics, and inactivation of pathogen indicators. To develop predictive assessments of the impacts of human activities on water quality and ecosystem health, EPA’s goal is to understand mechanisms for these transformations and to develop procedures for predicting their rates under differing environmental conditions. Current areas of emphasis include photochemical and microbial dynamics of organic and metallic engineered nanomaterials (ENMs), such as carbon nanomaterials, including graphene-based materials, release of engineered nanomaterials from polymer nanocomposites and other matrices that are commonly used in ENM formulations, and providing parameters and process relationships for modeling exposure to ENMs. The research includes elucidation of reactive oxygen species that mediate photochemical cycling and adverse effects of nanomaterials, UV effects on virulent organisms (bacteria, protozoa, viruses) and bacterial or bacteriophage indicators, and effects of natural organic matter, sediments, and soils on nanomaterial and pathogen transformations in the environment. Equipment, including solar simulators and weathering simulators, irradiance sensors, chromatographs, carbon analyzers, FTIR and UV-visible spectrometers, are available for these studies. Laboratory facilities include the equipment required for these studies with instrumentation to measure nanomaterial and sediment concentrations and size distributions, bacterial and bacteriophage concentrations (including qPCR), spectral properties of nanomaterials (FTIR, UV-visible, excitation-emission matrix fluorometry, and chromatographs), spectrometers for elucidating carbon transformation products. Access to ICP-MS, TEM, and SEM is also available for characterizing ENMs, their composites, and transformation products. Facilities for solar simulation and measurements of quantum yields and action spectra are available for photochemical and photobiological studies. Under the guidance of a mentor, the participant may contribute to the following research activities:Laboratory studies that provide data for development of procedures for evaluating releases of ENMs from polymer composites by weathering and abrasion; Obtaining and analyzing data to quantify relationships between the rate and extent of release and phototransformation with environmental conditions such as solar irradiance and temperature;Obtaining data and developing relationships that can be used to assess the transformation of the nanomaterials and pathogen indicators in water and sediments;Conducting internet and literature searches to elucidate significant light-induced transformation pathways of ENMs and pathogen indicators in environmental systems;Compilation and summarization of data and literature references into organized computer files;Statistical analysis of data using Excel and/or statistical software packages; and,Communication of results via presentation(s) and/or written reportLearning Objectives: The research participant will have the opportunity to join a multi-disciplinary research team and learn to provide technical support for the development of tools to predict the release, phototransformation, and transport of engineered nanomaterials (ENMs) in environmental systems and the photoinactivation of pathogens in natural and built aquatic systems.Mentor(s): The mentor for this opportunity is Dr. Richard Zepp (firstname.lastname@example.org). If you have questions about the nature of the research please contact the mentor(s).Anticipated Appointment Start Date: ~December 2020. All start dates are flexible and vary depending on numerous factors. Click here for detailed information about start dates.Appointment Length: The appointment will initially be for one year and may be renewed up to three or four additional years upon EPA recommendation and subject to availability of funding.Level of Participation: The appointment is full-time.Participant Stipend: The participant will receive a monthly stipend commensurate with educational level and experience. Click here for detailed information about full-time stipends.EPA Security Clearance: Completion of a successful background investigation by the Office of Personnel Management (OPM) is required for an applicant to be on-boarded at EPA.ORISE Information: This program, administered by ORAU through its contract with the U.S. Department of Energy (DOE) to manage the Oak Ridge Institute for Science and Education (ORISE), was established through an interagency agreement between DOE and EPA. Participants do not become employees of EPA, DOE or the program administrator, and there are no employment-related benefits. Proof of health insurance is required for participation in this program. Health insurance can be obtained through ORISE.Questions: Please see the FAQ section of our website. After reading, if you have additional questions about the application process please email EPArpp@orau.org and include the reference code for this opportunity.