摘要
以单壁碳纳米管(SWNTs)为吸附剂,系统地研究了其对活性污泥胞外聚合物(EPS)的吸附特性。结果表明,SWNTs能够快速吸附EPS,当吸附剂投加量为0.9 g/L时,吸附在20 min即可达到平衡,吸附动力学符合准二级动力学模型。吸附等温线能较好地用Langmuir吸附等温模型来描述,最大单分子吸附量为123.577 mg/g。pH值对吸附有较大影响,最佳吸附pH范围为5~7。
The adsorption behavior of extracellular polymeric substances (EPS) of activated sludge onto single-walled nanotubes (SWNTs) was investigated. The adsorption of EPS onto SWNTs was a fast process and the equilibrium was obtained within 20 min with an adsorbent dosage of 0.9g/L. The adsorption process followed a pseudo-second-order model. In addition, the adsorption fitted the Langmuir equation well and maximum monolayer adsorption capacity was 123.57 mg/g. The adsorption was greatly influenced by the solution pH and the optimum pH for adsorption was 5-7.
出处
《安徽化工》
CAS
2012年第4期28-31,共4页
Anhui Chemical Industry
关键词
碳纳米管
胞外聚合物
吸附
动力学
carbon nanotubes
extracelluar polymeric substances
adsorption
kinetics