(IMAGE)

Chiba University

Caption

Researchers at Chiba University, Japan, prepared polyacrylonitrile (PAN)-based activated carbon fibers that are capable of removing nitrate ions from the environment. A. Adsorbent structure and its surface functional groups. Quaternary nitrogen (N-Q), including graphitic nitrogen, and aliphatic amine could be effective for the removal of anionic pollutants, such as nitrate, phosphate, chromium, and arsenic anions. B. A graph representing the influence of equilibrium solution pH (pHe) on the amount of NO3- adsorption.

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Motoi Machida from Chiba University, Japan

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