Removal combined with reduction of hexavalent chromium from aqueous solution by Fe-ethylene glycol complex microspheres
Removal combined with reduction of hexavalent chromium from aqueous solution by Fe-ethylene glycol complex microspheres
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DOI：
10.1016/j.apsusc.2016.07.175
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发表时间：
2016-12
影响因子：
6.7
通讯作者：
Yongxing Zhang;Y. Jia
中科院分区：
文献类型：
--
作者：
Yongxing Zhang;Y. Jia
Three-dimensional Fe-ethylene glycol (Fe-EG) complex microspheres were synthesized by a facile hydrothermal method, and were characterized by field emission scanning electron microscopy and transmission electron microscopy. The adsorption as well as reduction properties of the obtained Fe-EG complex microspheres towards Cr(VI) ions were studied. The experiment data of adsorption kinetic and isotherm were fitted by nonlinear regression approach. In neutral condition, the maximum adsorption capacity was 49.78 mg g−1at room temperature, and was increased with the increasing of temperature. Thermodynamic parameters including the Gibbs free energy, standard enthalpy and standard entropy revealed that adsorption of Cr(VI) was a feasible, spontaneous and endothermic process. Spectroscopic analysis revealed the adsorption of Cr(VI) was a physical adsorption process. The adsorbed CrO42−ions were partly reduced to Cr(OH)3by Fe(II) ions and the organic groups in the Fe-EG complex.
