化学镀镍废液碳酸钙过滤-离子交换法再生技术的研究

A Research on the Regeneration of Spent Electroless Nickel Plating Bath with Calcium Carbonate Filtration and Ion Exchange

采用碳酸钙过滤 离子交换法 ,去除化学镀镍废液中的有害成分亚磷酸根、硫酸根、钠离子 ,使化学镀镍废液得到净化再生。讨论了流速、静置时间、pH值、温度等因素对废液再生效果的影响 ,确定了本体系适宜的反应条件。在优化工艺条件下 ,亚磷酸根、硫酸根、钠离子去除率分别可达 5 0 %、30 %、80 % ,并对其机理作了初步探讨。

The spent electroless nickel bath is regenerated by removing its hazardous components of phosphite radicals, sulfate radicals and sodium ions with calcium carbonate filtering bed in combination with ion exchange method. The effects of flow rate, retaining time, pH value, temperature, etc. on the regenerating efficiency are discussed, and on this basis, the reaction conditions suitable for the present system are determined. Under optimal conditions, the removing rates of phosphite radicals, sulfate radicals and sodium ions can reach 50%, 30% and 80% respectively. The mechanism is also discussed.