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Capacitive deionization (CDI) is a robust, energy efficient, and cost effective technology for water desalination. In collaboration with Dr. Satish Kumar and Dr. Costas Tsouris at Georgia Tech, we are developing nanostructured carbon material for effective and economical water and wastewater desalination. Our new approach for CDI is enabled by (1) synthesis of nanostructured high surface area acti ...

Methane is the second most prevalent greenhouse gas emitted after carbon dioxide, however, on a pound-to-pound comparison methane has a 25 times greater impact on climate change than carbon dioxide over a 100-year period. Accordingly, the 2014 Climate Action Plan signed by President Obama has directed agencies including the USDA, DOE, and EPA to reduce methane emissions. A significant effort in th ...

Formaldehyde is a reactive and flammable aldehyde which is well known as one of the harmful volatile organic compounds. A_x000D_ combination of respiratory disease, allergic dermatitis and other ailments so called Sick Building Syndrome (SBS) is associated with chronic exposure to formaldehyde. Therefore, monitoring for formaldehyde is important in residential buildings. In this Phase I_x000D_ dev ...

As recent crises in Flint, Michigan and Washington D.C. have demonstrated, elevated lead levels (ELL’s) can very suddenly and unexpectedly be introduced to water supplies through seemingly unrelated water system alterations. Ingestion of even trace amounts of lead can have detrimental permanent health effects, especially in children; the public is rightly concerned about lead content in the wate ...

The use of enzyme-linked immunosorbent assay (ELISA) to detect contaminants such as solvents, fuels, and pesticides in soil and water samples is now well established. Although ELISA and related methods can facilitate analysis of samples, several washing and separation steps are involved that require 30 to 120 minutes per sample to reach equilibrium. Recently, near infrared fluorescence immunoassa ...

Laser-induced fluorescence (LIF) can sometimes be used as a diagnostic device in biology and medicine. In general, LIF has difficulties in relating the fluorescence spectra to the concentration of the emitters within the tissue, in identifying different species, and in the possibility of destroying the molecules being probed if the wrong excitation wavelength is chosen. Many of the problems asso ...

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Infrared tunable diode laser spectrometers provide a highly effective means of measuring trace concentrations, with either remote sensing or with advective sampling. It is often desirable to measure more than one trace gas at a time. This is especially true when gas emissions are strongly correlated, such as in combustion emissions where measuring both the CO2 concentration and another minor con ...

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