Reddad Zacaria, Gérente Claire, Andrès Yves, Thibault Jean-François, Le Cloirec Pierre
Ecole des Mines de Nantes, GEPEA, UMR CNRS 6144, 4 rue Alfred Kastler, BP 20722, 44307 Nantes Cedex 3, France.
Water Res. 2003 Sep;37(16):3983-91. doi: 10.1016/S0043-1354(03)00295-1.
In the present work, Pb(2+) and Cd(2+) adsorption onto a natural polysaccharide has been studied in membrane reactors. The process involves a stirred semi-batch reactor for the adsorption step and a microfiltration (MF) process in order to confine the particles. Due to their lower affinity for the biosorbent, Cd(2+) ions were found to breakthrough the process faster than Pb(2+) cations. The experimental results showed the technical feasibility of the pilot. A mass balance model based on the Langmuir equilibrium isotherm was used to describe the adsorption process. This relation is able to predict experimental data under different operating conditions: the adsorbent and metal concentrations, and the permeate flow rate. Based on these results, it is demonstrated that the biosorbent studied represents an interesting low-cost solution for the treatment of metal ions polluted waters.
在本研究中，已在膜反应器中研究了天然多糖对Pb(2+)和Cd(2+)的吸附。该过程包括用于吸附步骤的搅拌半间歇式反应器和用于截留颗粒的微滤（MF）过程。由于Cd(2+)离子对生物吸附剂的亲和力较低，发现其比Pb(2+)阳离子更快地穿透该过程。实验结果表明了该中试规模的技术可行性。基于朗缪尔平衡等温线的质量平衡模型用于描述吸附过程。该关系式能够预测不同操作条件下的实验数据：吸附剂和金属浓度以及渗透流速。基于这些结果，证明所研究的生物吸附剂是处理金属离子污染水的一种有趣的低成本解决方案。
