Biosorption of mercury by Macrocystis pyrifera and Undaria pinnatifida:Influence of zinc,cadmium and nickel

作     者：Josefina Plaza Marisa Viera Edgardo Donati Eric Guibal 

作者机构：Centro de Investigacióny Desarrollo en Fermentaciones IndustrialesCINDEFI (CCT La Plata-CONICET UNLP)Facultad de Ciencias Exactas50 y 115(1900) La PlataArgentina Ecole des Mines d'Ale`sLaboratoire Ge'nie de l'Environnement Industriel6avenue de Clavie`resF-30319 Ale`s cedexFrance Ecole des Mines d‘Ale`sLaboratoire Ge'nie de l‘Environnement Industriel6avenue de Clavie`resF-30319 Ale`s cedexFrance 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2011年第23卷第11期

页      面：1778-1786页

核心收录：

学科分类：07[理学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

基　　金：supported by ANPCyT (PICT 25300) CONICET (PIP 5147) the European Commission through the ALFA program BIO-PROAM (Contract number:AML/190901/06/18414/II-0548-FC-FA) 

主　　题：mercury isotherm sorption M.pyrifera U.pinnatifida ESEM-EDX FT-IR spectrometry 

摘      要：This study investigated the adsorption of Hg（Ⅱ） on Macrocystis pyrifera and Undaria pinnatifida in monometallic system in the presence of Zn（II）,Cd（Ⅱ） and Ni（II）.The two biosorbents reached the same maximum sorption capacity （q m = 0.8 mmol/g） for *** showed a greater affinity （given by the coefficient b of the Langmuir equation） for mercury compared to *** （4.4 versus 2.7 L/mmol）.Mercury uptake was significantly reduced （by more than 50%） in the presence of competitor heavy metals such as Zn（II）,Cd（II） and Ni（Ⅱ）.Samples analysis using an environmental scanning electron microscopy equipped with an energy dispersive X-ray microanalysis showed that mercury was heterogeneously adsorbed on the surface of both biomaterials,while the other heavy metals were homogeneous *** analysis of biosorbents by Fourier transform infrared spectrometry indicated that Hg（Ⅱ） binding occurred on S=O （sulfonate） and N-H （amine） functional groups.