Underground mine ventilation provides a flow of air to the underground workings of a mine of sufficient volume to dilute and remove noxious gases (typically methane, CO).
carbon dioxide | Sulfur | sulfur | Carbon dioxide | titanium dioxide | Silicon dioxide | Titanium dioxide | Sulfur dioxide | sulfur dioxide | Titanium Dioxide | Sulfur oxide | Sulfur (magazine) | Shown above as a result of a 7 week period where the columns have been allowed to grow algae, cyanobacteria and other bacterial colonies. Of specific interest are the red regions of the middle column, indicative of purple non-sulfur bacteria (e.g. ''Rhodospirillaceae | Germanium dioxide | Carbon dioxide laser |
These efforts include chemically washing minerals and impurities from the coal, gasification (see also IGCC), treating the flue gases with steam to remove sulfur dioxide, carbon capture and storage technologies to capture the carbon dioxide from the flue gas and coal de-watering technologies to improve the energy quality and thus the efficiency of burning coal for energy.
The particles may be composed of dust or clay, soot or black carbon from grassland or forest fires, sea salt from ocean wave spray, soot from factory smokestacks or internal combustion engines, sulfate from volcanic activity, phytoplankton or the oxidation of sulfur dioxide and secondary organic matter formed by the oxidation of VOCs.
Vog, air pollution resulting from sulfur dioxide emitted by volcanoes