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

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 mercury.U.pinnatifida showed a greater affinity （giv...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2011-11, Vol.23 (11), p.1778-1786
Main Authors: Plaza, Josefina, Viera, Marisa, Donati, Edgardo, Guibal, Eric
Format: Article
Language:English
Subjects:
Adsorption
Binding, Competitive
biocompatible materials
Biodegradation, Environmental
biosorbents
biosorption
Cadmium
Chemical Sciences
Electron Probe Microanalysis
energy
ESEM-EDX
Fourier transform infrared spectroscopy
FT-IR spectrometry
Heavy metals
Hydrogen-Ion Concentration
isotherm
Langmuir
M. pyrifera
Macrocystis - chemistry
Macrocystis pyrifera
Mathematical analysis
Mercury
Mercury - isolation & purification
Metals, Heavy - chemistry
nickel
scanning electron microscopy
Sorption
sorption isotherms
Spectroscopy, Fourier Transform Infrared
Sulfonates
Thermodynamics
U. pinnatifida
Undaria - chemistry
Undaria pinnatifida
X-radiation
Zinc
傅里叶变换红外光谱
吸附容量
汞
环境扫描电子显微镜
裙带菜
锌
镍
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Summary: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 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.
ISSN:1001-0742
1878-7320
DOI:10.1016/S1001-0742(10)60650-X