磷酸三丁酯萃取处理镀铬废水的研究

STUDY ON THE EXTRACTIVE TREATMENT OF CHROME. PLATING WASTE WATER WITH TRIBUTYL PHOSPHATE

在常温下,以民用煤油作稀释剂,用磷酸三丁酯(TBP)萃取处理镀铬废水。经4—5级萃取,可使水相中Cr^(6+)由70mg/L降至国家排放标准以下。有机相用稀碱溶液经2—3级反萃取再生,Cr^(6+)完全回收利用,这对环境保护大有好处。

At low temperature the chrome-plating waste water delutes with domestic kerosene and after the 4th-sth degree extraction with tributyl phosphate the content of chromium (Ⅵ) in water phase can be reduced from 70mg/L to being below the state stand and of draining waste products. After the 2nd-3nd degree inverse extraction of the organic phase with the diluted base the chromium(Ⅵ)can be totally recovered, which is of great importance to the environmental conservation.