Reddad Z, Gérente C, Andrès Y, Le Cloirec P
Ecole des Mines de Nantes, GEPEA, UMR CNRS 6144, 4 rue Alfred Kastler, BP 20722, 44307 Nantes cedex 3, France.
Water Sci Technol. 2004;49(1):163-70.
Industrial wastewaters often contain heavy metal ions that are toxic to many living species. Therefore, economic treatment methods are investigated, involving the sorption of metal ions onto wastes or natural materials. In the present work, the ability of sugar beet pulp, a common waste of the sugar industry, to remove Pb2+ polluted waters is investigated. The kinetic and equilibrium experiments were performed in batch reactor in order to determine the Pb2+ adsorption mechanisms onto the polysaccharide. The dynamic studies of Pb2+ fixation onto the natural polysaccharide involve an adsorption reactor coupled with microfiltration membrane in order to confine the adsorbent particles. A mass balance model based on the Langmuir equilibrium isotherm was used to describe the Pb2+ breakthrough curves. This model successfully simulated the entire breakthrough curves whatever the operating conditions used. It provides a useful tool for process simulation and optimisation.
工业废水通常含有对许多生物物种有毒的重金属离子。因此，人们研究了经济的处理方法，包括将金属离子吸附到废物或天然材料上。在本研究中，对制糖工业的常见废料甜菜粕去除含Pb2+废水的能力进行了研究。为了确定Pb2+在多糖上的吸附机制，在间歇式反应器中进行了动力学和平衡实验。对Pb2+固定在天然多糖上的动态研究涉及一个与微滤膜耦合的吸附反应器，以限制吸附剂颗粒。基于朗缪尔平衡等温线的质量平衡模型被用来描述Pb2+的穿透曲线。无论使用何种操作条件，该模型都成功地模拟了整个穿透曲线。它为过程模拟和优化提供了一个有用的工具。
