| 摘要 |
The process comprises the steps of:- (a) adjusting the pH of the liquor e.g. metal refinery effluent as necessary to a pH of 6.0+/-0.5; (b) removing by filtration any precipitate or other solid matter from the so-treated liquor of step (a); (c) heating the filtrate from step (b), or, in the absence of step (b), the treated liquor of step (a) to not less than 70 DEG C; (d) electrolysing the heated filtrate or liquor of step (c) at a substantially constant temperature of at least 70 DEG C so as to destroy the stable complexes and thereby to precipitate at least a proportion of the said metal in the form of hydrated oxides or hydroxides, and (e) filtering-off the precipitate from step (d). Complexes present in effluents which,are otherwise difficult to break down and cause problems in purification and control are said to be successfully destroyed by this method. e |
