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THE RESEARCH ACTIVITY PRESENTED IN THIS PROPOSAL FOCUSES ON THE DEVELOPMENT OF SIMPLE RAPID TESTS PROCEDURES TO PREDICT TRANSPORT OF WASTE LIQUIDS THAT CONTAIN ORGANIC COMPOUNDS THROUGH CLAYEY SOIL LINERS OVER EXTENDED TIME PERIODS. THESE PROCEDURES REFLECT BULK POROSITY AND PORE-SIZE DISTRIBUTION CHARACTERISTICS OF SPECIFIC ORGANIC COMPOUND CLAY PAIRS. THE PROJECT WILL ASSESS THE FEASIBILITY OF P ...

STABILIZATION OF HAZARDOUS WASTE SITES AND RADIOACTIVE URANIUM MILL TAILINGS REQUIRES THAT METHODS BE DEVELOPED TO PREVENT EROSION OF THE PROTECTIVE COVERING APPLIED AT EACH SITE TO CONTAIN THE WASTES. IN THE CASE OF URANIUM MILL TAILINGS A CLAY CAP UP TO SIX FEET THICK IS APPLIED TO PREVENT ESCAPE OF RADIOACTIVE RADON GAS. IN ARID AREAS WHERE VEGETATION IS DIFFICULT TO ESTABLISH, A ROCK MULCH OR ...

Perfluoroalkyl substances (PFASs) have been identified as a serious health contaminant in water at levels between 12 and 516 parts per trillion by the Agency for Toxic Substances & Disease Registry. In 2016, the EPA set a lifetime health advisory of 70 parts per trillion for two PFASs, perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS). These compounds come from a variety of so ...

Human exposure to polyfluoroalkyl substances (PFAS) has been linked to cancer, elevated cholesterol, obesity, immune suppression and endocrine disruption. The EPA has set a PFOA health advisory of 70 parts-per-trillion. Due to widespread use of PFAS in aqueous film-forming foam (AFFF) to fight fuel fires, millions of gallons of PFASs have been used at oil refineries, military bases, civil aviation ...

Due to increasing concerns over long-term effects of PFOS and PFAS on human body, health based values were set by regulatory authoritative bodies for drinking water standard. Currenty lab-based PFOA and PFOS water tests cost $200-$300 per sample with a turnaround time of 2-3 weeks. In this program, 2W iTech LLC proposes to develop a low-cost fieldable sensing technology for detecting trace amounts ...

EPA launched its drinking water guidelines for PFOA and PFOS in response to rising concerns of these chemicals toward water security. Many conventional wastewater treatment processes are ineffective at removing perfluorochemicals due to their strong resistance to hydrolysis, photolysis, and chemical or microbial degradation. This SBIR project will demonstrate an innovative microwave-assisted membr ...

This proposal addresses the need for a pre-treatment technology to remove per- and poly- fluoroalkyl substances (PFAS) from industrial wastewaters. Phase I involves the design, build and testing of a novel technology to remove PFAS from water, termed the Aqueous Electrostatic Concentrator (AEC). This technology will be tested as an electrical bench-scale device that concentrates PFAS through selec ...

Wild fires produce significant air pollution, posing health risks to first responders, residents in nearby areas, and downwind communities. Wildfires are increasing in size and intensity, and the fire season is growing longer. Technologies for measuring air pollutants, including particulates, carbon monoxide, nitrogen dioxide, and carbon dioxide, over the wide range of levels expected in areas dow ...

As forest fires are increasing in prevalence and intensity there is a need for miniaturized, lower cost, and easily portable air sensors that provide information to first responders, public health managers and communities so informed, timely decisions can be made. PM2.5 is an accepted standard for particulate matter (PM) measurements, but PM2.5 mass measurements cannot identify sources without ana ...