Photodegradation of methylmercury in lakes

Article Abstract:

The photodegradation of surface water decomposes methylmercury in lakes. The reaction rate is of the first order, and depends only on the methylmercury concentration and the intensity of solar radiation and is independent of biological influences. In situ incubation of lake water indicates that rates of photodegradation are nearly double the rates contributed by snow, rain water, land runoff, and streamflow. The levels of methylmercury in the bottom sediments are high. The decomposition rate decreases with depth and is associated with the exponential reduction in light intensity.

Research, Environmental aspects, Methylmercury, Methylmercury compounds, Decomposition (Chemistry), Lake ecology

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Solid-state organic solar cells

Article Abstract:

Bach and colleagues have described a new type of solar cell which is more efficient that other solid-state organic devices. The new approach uses an amorphous conducting material and the development of an organic hole-transport material (HTM) whereby positive charges move from one molecule to another. The amorphous state is predicted to form a better interface with dye-covered TiO(sub2) electrodes.

Solid state chemistry, Solar cells

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