摘要
实验主要研究了活性污泥对Pb(Ⅱ)的吸附行为和吸附作用机理。结果表明,伪一级动力学模型和伪二级动力学模型均符合活性污泥对Pb(Ⅱ)吸附实验。在10、20和30℃时,Langmuir和Freundlich等温吸附线均能对活性污泥吸附Pb(Ⅱ)的行为进行较好的拟合。根据Zeta电位分析、轻金属离子释放分析、傅里叶红外分析(FT-IR)、扫描电镜分析(SEM)、和X射线光谱衍射分析(XPS)可得,活性污泥对铅的吸附机理包含静电吸附、离子交换、微絮凝沉淀、表面络合等。
Batch experiments were used to investigate the sorption mechanisms of Pb（ Ⅱ） on activated sludge. Both the pseudo-first-order and the pseudo-second-order models were able to satisfactorily model the sorption process of Pb（ Ⅱ） onto the activated sludge. Both the Langmuir and the Freundlich isotherms modeled the equilibrium sorption data satisfactorily. Various measurements were done,such as zeta potential measurements,release of light metal ions,FT-IR measurements,scanning electron microscopy measurements,and XPS measurements. The measurements indicated that the sorption mechanisms of Pb（ Ⅱ） on the activated sludge involved electrostatic adsorption,complexation with negatively charged groups,precipitation,and ion exchange.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第7期3707-3714,共8页
Chinese Journal of Environmental Engineering
