The Treatment of Hexavalent Chromium in Waste Liquid From Fugen Decommissioning

Authors have developed the new treatment technique for hexavalent chromium (Cr6+ ) in the liquid waste. Cr6+ can be reduced to trivalent chromium (Cr3+ ) by hydrogen peroxide (H2 O2 ) under acidic condition with small amount of secondary waste. In 2010, this technique was applied to the cooling water for iron-water shield surrounding the core region in Fugen Nuclear Power Station of Japan Atomic Energy Agency (JAEA). The concentration of Cr6+ and total chromium (Cr) were reduced to less than 0.5ppm and 2.0ppm in liquid waste, respectively. These values satisfy the water pollution prevention law.Copyright © 2010 by ASME