Abstract:

The activated carbon is modified by impregnation method to study the problem of difficult removal of organic matter in hydrometallurgical high-salt wastewater. The removal effect of organic matter by modified activated carbon and its adsorption mechanism are discussed. The results show that under conditions of temperature of 25℃, modified activated carbon dosage of 50 g/L, no adjustment pH, and adsorption time of 36 h, the COD removal rate by modified activated carbon is 65%, which is 25% higher than that by unmodified activated carbon. The adsorption kinetics by modified activated carbon follows the pseudo-second-order model. The adsorption equilibrium follows Langmuir isotherm model. The maximum adsorption capacity is 40.49 mg/g.

Key words: hydrometallurgy wastewater, high-salt, modified activated carbon

摘要：

针对湿法冶金高盐废水有机物去除难的问题，通过浸渍法对活性炭进行改性，研究了改性活性炭对湿法冶金高盐废水中有机物的去除效果，并探讨了改性活性炭的吸附机理。结果表明，在温度为25℃，改性活性炭投加量为50 g/L，不调节pH，吸附时间为36 h的条件下，COD去除率为65%，较改性前提高了25%。吸附过程符合准二级动力学方程，吸附等温线服从Langmuir方程，饱和吸附量为40.49 mg/g。

关键词: 湿法冶金废水, 高盐, 改性活性炭

CLC Number: 

• X703.1