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Cr(VI) Removal from Aqueous by Adsorption on Amine-Functionalized Mesoporous Silica Prepared from Silica Fume
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نویسنده
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li x. ,han c. ,zhu w. ,ma w. ,luo y. ,zhou y. ,yu j. ,wei k.
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منبع
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journal of chemistry - 2014 - دوره : 2014 - شماره : 0
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چکیده
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Amino-functionalized mesoporous silica mcm-41 materials have been prepared to develop efficient adsorbents of cr(vi) in wastewater,using silica fume as silica source. functionalization with amino groups has been carried out by using grafting method. the materials have been characterized by means of x-ray diffraction (xrd),nitrogen (n adsorption-desorption,fourier transform infrared (ftir) spectroscopy,scanning electron microscopy (sem),transmission electron microscopy (tem),and x-ray photoelectron spectroscopy (xps). adsorption potential of the material for cr(vi) removal from aqueous solution was investigated by varying experimental conditions such as ph,initial metal concentration,and contact time. the equilibrium data were analyzed using the langmuir and freundlich isotherm by linear regression analysis,and the results show that the adsorption equilibrium data obeyed the langmuir model. in addition,the kinetics analysis revealed that the overall adsorption process was successfully fitted with the pseudo-second-order kinetic model. © 2014 xitong li et al.
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آدرس
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faculty of environmental science and engineering,kunming university of science and technology, China, faculty of environmental science and engineering,kunming university of science and technology, China, faculty of environmental science and engineering,kunming university of science and technology,kunming,china,state key laboratory of complex nonferrous metal resources cleaning utilization in yunnan province,national engineering laboratory for vacuum metallurgy,kunming university of science and technology, China, state key laboratory of complex nonferrous metal resources cleaning utilization in yunnan province,national engineering laboratory for vacuum metallurgy,kunming university of science and technology,kunming,china,faculty of metallurgical and energy engineering,kunming university of science and technology,kunming,china,key laboratory of non-ferrous metals vacuum metallurgy of yunnan province,eng. research center for silicon metallurgy and silicon materials of yunnan provincial universities, China, faculty of environmental science and engineering,kunming university of science and technology, China, state key laboratory of complex nonferrous metal resources cleaning utilization in yunnan province,national engineering laboratory for vacuum metallurgy,kunming university of science and technology,kunming,china,faculty of metallurgical and energy engineering,kunming university of science and technology,kunming,china,key laboratory of non-ferrous metals vacuum metallurgy of yunnan province,eng. research center for silicon metallurgy and silicon materials of yunnan provincial universities, China, state key laboratory of complex nonferrous metal resources cleaning utilization in yunnan province,national engineering laboratory for vacuum metallurgy,kunming university of science and technology,kunming,china,faculty of metallurgical and energy engineering,kunming university of science and technology,kunming,china,key laboratory of non-ferrous metals vacuum metallurgy of yunnan province,eng. research center for silicon metallurgy and silicon materials of yunnan provincial universities, China, state key laboratory of complex nonferrous metal resources cleaning utilization in yunnan province,national engineering laboratory for vacuum metallurgy,kunming university of science and technology,kunming,china,faculty of metallurgical and energy engineering,kunming university of science and technology,kunming,china,key laboratory of non-ferrous metals vacuum metallurgy of yunnan province,eng. research center for silicon metallurgy and silicon materials of yunnan provincial universities, China
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Authors
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