Recovery of metals from solutions containing chelants

Liquid purification or separation – Processes – Utilizing electrical or wave energy directly applied to...

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210760, 210912, 210913, C02F 164, C02F 178

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active

048469785

ABSTRACT:
Metal chelates in solution are decomposed more effectively and completely by ozonation when magnesium hydroxide is added to the chelate solution prior to ozonation. The process is particularly applicable to waste streams from which it is desired to recover metals to avoid contamination of the environment and/or reuse them.

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J. Chem. Eng. Japan vol. 19, pp. 294-299 (1986) "Ozonation Rate of Water-Soluble Chelates and Related Compounds".
J. Chem. Eng. Japan, vol. 12, pp. 111-117 (1979) "Single and Simultaneous Absorptions of Lean SO.sub.2 and NO.sub.2 into Aqueous Slurries of Ca(OH).sub.2 and Mg(OH).sub.2 ".
Journal of Water Pollution Control Federation, vol. 47, pp. 2114-2129 (1975) "Ozonation of Photographic Processing Wastes".
Anal. Chem., vol. 50, p. 50 (1978) "Ozone Oxidation of Organic Sequestering Agents in Water Prior to the Determination of Trade Metals by Anodic Stripping Voltammetry".
Environ. Health Persp., vol. 69, p. 31 (1986) "Occurrence of By-Products of Strong Oxidants Reacting with Drinking Water Contaminants--Scope of the Problem".
Ozone: Science & Engin., vol. 1, p. 133 (1979) "Ozonation of Hanford Nuclear Defense Waste".
Journal of Water Pollution Control, vol. 51, p. 113 (1978) "Removal of Heavy Metals via Ozonation".

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