Preparation and Characterization of Ni-Doped Calcium Silicate Hydrate Based on Steel Slag: Adsorption Capacity for Rhodamine B from Aqueous SolutionReport as inadecuate




Preparation and Characterization of Ni-Doped Calcium Silicate Hydrate Based on Steel Slag: Adsorption Capacity for Rhodamine B from Aqueous Solution - Download this document for free, or read online. Document in PDF available to download.

Journal of Chemistry - Volume 2015 2015, Article ID 131050, 9 pages -

Research ArticleCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

Received 17 February 2015; Revised 30 April 2015; Accepted 4 May 2015

Academic Editor: Kaustubha Mohanty

Copyright © 2015 Lu Zeng and Ligang Yang. 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.

Abstract

Calcium silicate hydrate based on steel slag SCSH and Ni-doped SCSH NSCSH were synthesized under specific hydrothermal conditions at saturated vapor pressure and 185°C for 7 hours. The structure and morphology of SCSH and NSCSH were characterized by XRD, SEM, and N2 adsorption-desorption. SCSH mainly consisted of amorphous calcium silicate hydrate gel C-S-H gel together with some flake-like tobermorite and NSCSH consisted of crystalline tobermorite and xonotlite. The addition of NiNO32 had great influence on microstructure of the composites, and SCSH possesses a mesoporous structure with slit-shaped pores, but NSCSH has narrow distributions of pore size. Furthermore, NSCSH has a higher adsorption capacity for Rhodamine B RhB than SCSH with removal percentages of RhB of about 52.4% and 88.2%, respectively. In addition, the effects of NSCSH dosage and pH values on the adsorption of RhB were investigated. Adsorption isotherm parameters are obtained from both Langmuir and Freundlich analysis and showed a better fit to a Langmuir model. All results indicated that NSCSH has a great potential to be a safe, easily-made, and cost-effective material for the control of RhB contamination.





Author: Lu Zeng and Ligang Yang

Source: https://www.hindawi.com/



DOWNLOAD PDF




Related documents