Background Greenhouse gases (GHGs) trap heat and lead to global warming and other severe effects of climate change. Carbon dioxide (CO2) is the main source of GHG, and its capture before entering the atmosphere is an important mitigation approach. Captured CO2 from point-emission sources or via direct air capture (DAC) can be geologically sequestered...

Background Hydrogen peroxide (H2O2) is widely used for industrial synthesis of organic chemicals, advanced oxidation of drinking or wastewater, and surface disinfection of pathogens. Currently, ~95% of H2O2 production employs the energy- and chemical-intensive anthraquinone-oxidation process. Photocatalytic H2O2 production is an emerging alternative...

The proper treatment of wastewater is becoming more and more important as the number of toxic and biologically recalcitrant organic compounds continues to increase. Current treatment systems are sequentially coupled, in that they involve a two-step process of advanced oxidation followed by biodegradation. In the ideal case of sequential coupling, advanced...

While photosynthetic microorganisms offer a promising route to generate sustainable transportation fuels and products using solar energy, boosting their photosynthetic efficiency above normal levels (<5%) will help ensure its economic viability. A major source of inefficiency is that photosynthetically active radiation (PAR, 400-700 nm) constitutes...

In light of environmental concerns and the finite nature of petroleum-based sources, the production of biofuels and other valuable products from microalgae is very promising. Delivering concentrated CO2 is an essential step that enables microalgae cultivation to have high productivity and favorable economics. In order to achieve both benefits, the...

Microalgae are very useful biological systems for capturing carbon dioxide (CO2 ) and generating biomass and many useful products. Increasing the CO2 concentration in gas supplied to a microalgae growth system can improve its productivity many fold over using atmospheric air. Flue gas could be a good source of CO2 -enriched gas; however, its usefulness...

Obesity is epidemic in the United States, and it is increasingly a problem in much of the developed world. The health care costs associated with obesity and obesity-related diseases are a significant and increasing fraction of total healthcare spending. Currently, the most effective means to reverse obesity is surgical intervention: gastric bypass...