Ecole des mines d'Alès, Centre des Matériaux des Mines d'Alès (C2MA), Pôle Matériaux Polymères Avancés (MPA) 6, Avenue de Clavières, F-30319 Alès Cedex, France.
Institut Européen des Membranes-IEM (UMR 5635 CNRS-ENSCM-UM2)-Equipe Génie des Procédés Membranaires, Université Montpellier cc047, Place Eugene Bataillon, 34095 Montpellier Cedex 5, France.
Bioresour Technol. 2017 May;231:26-35. doi: 10.1016/j.biortech.2017.01.066. Epub 2017 Feb 2.
The binary sorption of Pb(II) and Cu(II) onto calcium alginate, algal biomass and algal/glutaraldehyde-crosslinked polyethyleneimine (PEI) composite beads was studied in the absence and presence of Ca(II). Different competitive models were compared for predicting the equilibrium data. Results show that all the sorbents have a significant preference for Pb(II) over Cu(II) in Pb-Cu system: the separation factors reach 14.1, 9.1 and 3.6 for alginate, algal biomass and algal/PEI beads, respectively. Kinetic studies confirm the occurrence of an ion-exchange mechanism between Pb(II) and Cu(II) as the sorption sites are progressively saturated. Competitive Sips model predicts well the sorption data for all the sorbents. In Pb-Cu-Ca system, the Cu(II) sorption by algal beads was negligible, while algal/PEI still maintained a significant sorption of Cu(II) sorption under these conditions.
在不存在和存在 Ca(II) 的情况下，研究了 Pb(II) 和 Cu(II) 在海藻酸钠、藻类生物质和藻类/戊二醛交联聚乙烯亚胺 (PEI) 复合珠上的二元吸附。比较了不同的竞争模型来预测平衡数据。结果表明，所有吸附剂在 Pb-Cu 体系中对 Pb(II) 都有明显的偏好，对 Cu(II) 的选择性因子分别达到 14.1、9.1 和 3.6：海藻酸钠、藻类生物质和藻类/PEI 珠。动力学研究证实了 Pb(II) 和 Cu(II) 之间发生了离子交换机制，因为吸附位点逐渐饱和。竞争 Sips 模型很好地预测了所有吸附剂的吸附数据。在 Pb-Cu-Ca 体系中，藻类珠对 Cu(II) 的吸附可以忽略不计，而在这些条件下，藻类/PEI 仍对 Cu(II) 的吸附保持显著。
