Abstract:

The adsorption and removal of Cr(Ⅵ)from water solution by powdered activated carbon has been researched. Based on single-factor experiments,the removing conditions for Cr(Ⅵ)can be optimized by response surface method. The results show that the model can fit the experimental parameters quite well. When the initial mass concentration of Cr(Ⅵ)is 50 mg/L,the optimal removing conditions for the Cr(Ⅵ)obtained by response surface method are as follows:pH is 3,adsorption time 21.56 min,and PAC dosage 2.40 g/L,the corresponding chromium(Ⅵ)removing rate is 86.00%. The relative deviation between experimental and predicated values is only 1.07%,which demonstrates that the model is reasonable and feasible.

Key words: response surface method, powdered activated carbon, wastewater treatment

摘要：

研究了粉末活性炭（PAC）吸附去除水溶液中的Cr（Ⅵ），利用基于单因素实验的响应面法优化了Cr（Ⅵ）的去除条件。结果表明，模型能很好地拟合实验数据。当Cr（Ⅵ）初始质量浓度为50 mg/L时，由响应面法得到的Cr（Ⅵ）最佳去除条件是：pH=3、吸附时间为21.56 min、PAC投加质量浓度为2.40 g/L，相应的Cr（Ⅵ）的去除率为86.00%。实验值和预测值的相对偏差仅为1.07%，证实模型合理可行。

关键词: 响应面法, 粉末活性炭, 废水处理

CLC Number: 

• X703.1