摘要
电镀中常用的酸铜工艺的水洗废水为强酸性,pH值超过了反渗透膜允许的范围,无法应用反渗透法进行浓缩回用于电镀槽。为此,采用全新的过冷水动态制冰技术,对酸铜工艺电镀水洗废水进行冷冻法处理。结果表明,一次冷冻结晶冰融水的溶质去除率超过90%,可满足一级水洗槽补充水洗水的要求;二次冷冻浓缩液达到电镀槽电镀液浓度的80%,可回用于电镀槽补充电镀液。
The washing wastewater of copper acid process commonly used in electroplating is strongly acidic,and the pH value exceeds the permissible range of reverse osmosis membrane,so it is impossible to concentrate the wastewater by reverse osmosis and reuse it in electroplating bath. A new supercooled water dynamic freezing process was used to treat the electroplating washing wastewater of copper acid process. The solute removal rate of the melting water of primary freezing crystalline ice exceeded 90%,which could meet the requirement of supplementary washing water of primary washing tank. The concentrated solution reached 80% of the concentration of electroplating bath after secondary freezing,which could be returned to the electroplating bath to replenish the electroplating solution.
作者
陈栋
张朝升
荣宏伟
苟思宇
CHEN Dong;ZHANG Chao-sheng;RONG Hong-wei;GOU Si-yu(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China;For Posterity Environmental Technology Co.Ltd.,Guangzhou 510800,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2020年第3期97-101,108,共6页
China Water & Wastewater
基金
国家自然科学基金资助项目(21477027)
广州大学基础创新基金资助项目(2017GDJC-D11)。
关键词
过冷水
动态制冰冷冻法
酸铜电镀废水
supercooled water
dynamic freezing method
copper acid electroplating wastewater
