Synthesis of Composite and Its Reduction and Chelation Mechanisms for Cr(VI) from Aqueous Solution
Publication: Journal of Environmental Engineering
Volume 144, Issue 3
Abstract
In this paper, a (PEI) composite was synthesized via and PEI cross-linked by glutaraldehyde. The removal rate of Cr(VI) by composite was investigated and compared with that of Pb(II) and Ni(II). The effects of reacting time, dosage, initial concentration, pH value, and coexisting heavy metal on removal rates of Cr(VI), Pb(II), and Ni(II) are discussed. The characteristics of composite and its removal mechanism for Cr(VI) were analyzed by scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD). The results show that the removal rate of Cr(VI) (92.6%) by composite is obviously higher than that of Pb(II) (60.2%) and Ni(II) (23.8%). composite is effective for Cr(VI) removal. The heavy-metal ions coexisting in the mixture solution have a remarkable effect on the removal of Cr(VI). The paper concludes that Cr(VI) was reduced into Cr(III) by before chelating with PEI.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 51278418), Industrial Research Project (2013K11-10) of Shaanxi Province and Science and Technology Project of Yulin City, Shaanxi Province.
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©2018 American Society of Civil Engineers.
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Received: Mar 13, 2017
Accepted: Sep 19, 2017
Published online: Jan 6, 2018
Published in print: Mar 1, 2018
Discussion open until: Jun 6, 2018
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