article thumbnail

Coal-tar-based pavement sealant a major source of PAH contamination in Milwaukee streams

Green Car Congress

Runoff from pavement with coal-tar-based sealant is the primary source of toxic polycyclic aromatic hydrocarbons (PAHs) to streambed sediments in Milwaukee, Wisconsin, according to a US Geological Survey and Milwaukee Metropolitan Sewerage District open-access study published in the journal Environmental Toxicology and Chemistry.

Milwaukee 210
article thumbnail

NC State team develops new Si/C inverter; 12.1 kW/L & greater efficiency in a smaller, lighter package

Green Car Congress

Further, says Iqbal Husain, ABB Distinguished Professor of Electrical and Computer Engineering at NC State and director of the FREEDM Center, the silicon carbide prototype inverter can transfer 99% of energy to the motor—about two percent higher than the best silicon-based inverters under normal conditions.

Congress 150