论文部分内容阅读
前言根据电镀废水的排放标准和综合利用的原则,电镀废水需要处理和回收的成份一般如下:酸、碱;各种重金属的盐类,如金、银、镍、铜、铅、锌等的盐类;以及毒性更大的Cd_d~(++)、Hg~(++)、Cr~(+6)、CN~-、等离子。这些物质的排放标准: Hg~ (++)(0.05mg/L)、Cd~(++)(0.1mg/L)、Cr~(+6) (0.5mg/L)、CN~- (0.5mg/L)、Cu~(++)(1mg/L)、Pb~(++)(1mg/L)、Zn~(++)(5mg/L)。这些物质大都来自各种电镀溶液和浸渍钝化溶液。它们通过电镀工件的清洗而被带出到清洗水中,而使清洗成水为电镀的废水。如果设法使电镀工件带出的电镀溶液和浸渍钝化溶液尽可能减少,则电镀工件所带出的有毒物质或有用成份相应的减少,以至达到
Preface According to the electroplating wastewater discharge standards and the principle of comprehensive utilization, electroplating wastewater needs to be treated and recycled components are generally as follows: acid, alkali; various heavy metals salts, such as gold, silver, nickel, copper, lead, zinc and other salts As well as the more toxic Cd_d ~ (++), Hg ~ (++), Cr ~ (+6), CN ~ -, plasma. The emission standards of these substances were as follows: Hg ++ (0.05mg / L), Cd ++ (0.1mg / L), Cr + (0.5mg / L) mg / L), Cu ~ (++) (1mg / L), Pb ~ (++) (1mg / L) and Zn ~ (++) (5mg / L). Most of these materials come from a variety of plating solutions and immersion passivation solutions. They are brought out of the wash water by the cleaning of the electroplated work pieces, leaving the wash water to electroplating waste water. If it is attempted to minimize the plating solution and immersion passivation solution carried by the electroplated workpiece, a corresponding reduction in the amount of toxic materials or useful components carried by the electroplated workpiece may be achieved