Biosorption of mercury by Macrocystis pyrifera and Undaria pinnatifida: influence of zinc, cadmium and nickel.
Biosorption of mercury by Macrocystis pyrifera and Undaria pinnatifida: influence of zinc, cadmium and nickel.
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DOI：
10.1016/s1001-0742(10)60650-x
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发表时间：
2011-11
影响因子：
6.9
通讯作者：
J. Plaza;M. Viera;E. Donati;E. Guibal
中科院分区：
文献类型：
--
作者：
J. Plaza;M. Viera;E. Donati;E. Guibal
研究了Zn（II）、Cd（II）和Ni（II）共存下，大型藻类（Macrocystis pyrifera）和裙带菜（Undaria pinnatifida）对Hg（II）的吸附行为。这两种生物吸附剂达到相同的最大吸附容量（qm= 0.8 mmol/g）的汞。联合pinnatifida对汞的亲和力（由朗缪尔方程的系数B给出）比M. pyrifera（4.4 vs 2.7 L/mmol）。汞的吸收显着减少（超过50%），在竞争对手的重金属，如锌（II），镉（II）和镍（II）的存在。样品分析使用环境扫描电子显微镜配备了能量色散X射线微分析表明，汞是不均匀吸附在两种生物材料的表面上，而其他重金属均匀分布。通过傅里叶变换红外光谱分析的生物吸附剂表明，汞（II）的结合发生在S=O（磺酸盐）和N-H（胺）的功能基团。
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 (qm= 0.8 mmol/g) for mercury. U. pinnatifida showed a greater affinity (given by the coefficient b of the Langmuir equation) for mercury compared to M. pyrifera (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 distributed. The analysis of biosorbents by Fourier transform infrared spectrometry indicated that Hg(II) binding occurred on S=O (sulfonate) and N-H (amine) functional groups.