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| Adsorption performance of amino functionalized magnetic graphene oxide composite to ionic dyes. |
| WEI Jin-zhi, CHEN Fang-ni, SUN Xiao-jun, ZHANG Feng-ming, WANG Hong |
| College of Chemical and Environmental Engineering, Harbin University of Science and Technology, Haerbin 150040, China |
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Abstract Magnetic Triethylene-tetramine Graphene oxide (M-T-GO) was firstly synthesized by constant temperature stirring and hydrothermal methods in this work, and characterized by Scanning electron microscope (SEM) and X-ray photoelectron spectrum (XPS). Adsorption capacity of ionic dyes on M-T-GO under different pH, adsorption time and initial concentration were investigated. At the same time adsorption kinetics and adsorption isotherm were fitted respectively. Pseudo-second-order model and Langmuir model fitted the adsorption of ionic dyes on M-T-GO. The adsorption property of M-T-GO for TY and MB was outstanding and the saturated adsorption capacities were 157.23mg/g and 169.49mg/g, respectively. Compared with GO, M-T-GO could remove ionic dyes more effectively. Moreover, M-T-GO made separation easy in the foreign magnetic field and possessed good performance of regeneration.
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Received: 15 December 2015
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