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Materials 2017, 10(6), 597; doi:10.3390/ma10060597

Synthesis, Characterization and Hexavalent Chromium Adsorption Characteristics of Aluminum- and Sucrose-Incorporated Tobermorite

1
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
2
Guangdong Low Carbon Technologies Engineering Centre for Building Materials, South China University of Technology, Guangzhou 510640, China
3
School of Civil Engineering, Shaoguan University, Shaoguan 512005, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Eric Guibal
Received: 21 April 2017 / Revised: 22 May 2017 / Accepted: 23 May 2017 / Published: 30 May 2017
(This article belongs to the Special Issue Sorption Materials for Environment Purification)
View Full-Text   |   Download PDF [6818 KB, uploaded 30 May 2017]   |  

Abstract

Tobermorites were synthesized from the lime-quartz slurries with incorporations of aluminum and sucrose under hydrothermal conditions, and then used for adsorption of Cr(VI). The chemical components, and structural and morphological properties of tobermorite were characterized by X-ray diffraction (XRD), thermogravimetric-differential scanning calorimetry (TG-DSC), Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), X-ray photoelectron spectroscopic (XPS) and N2 adsorption–desorption measurements. The formation and crystallinity of tobermorite could be largely enhanced by adding 2.3 wt.% aluminum hydroxide or 13.3 wt.% sucrose. Sucrose also played a significantly positive role in increasing the surface area. The adsorption performances for Cr(VI) were tested using a batch method taking into account the effects of pH, the adsorption kinetics, and the adsorption isotherms. The adsorption capacities of the aluminum- and sucrose-incorporated tobermorites reached up to 31.65 mg/g and 28.92 mg/g, respectively. Thus, the synthesized tobermorites showed good adsorption properties for removal of Cr(VI), making this material a promising candidate for efficient bulk wastewater treatment. View Full-Text
Keywords: tobermorite; aluminum; sucrose; adsorption; hexavalent chromium tobermorite; aluminum; sucrose; adsorption; hexavalent chromium
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhao, Z.; Wei, J.; Li, F.; Qu, X.; Shi, L.; Zhang, H.; Yu, Q. Synthesis, Characterization and Hexavalent Chromium Adsorption Characteristics of Aluminum- and Sucrose-Incorporated Tobermorite. Materials 2017, 10, 597.

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