Synthesis and Characterization of Different Crystalline Calcium Silicate Hydrate: Application for the Removal of Aflatoxin B1 from Aqueous SolutionReport as inadecuate




Synthesis and Characterization of Different Crystalline Calcium Silicate Hydrate: Application for the Removal of Aflatoxin B1 from Aqueous Solution - Download this document for free, or read online. Document in PDF available to download.

Journal of Nanomaterials - Volume 2014 2014, Article ID 431925, 10 pages -

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

Received 31 December 2013; Accepted 17 February 2014; Published 17 March 2014

Academic Editor: Ming-Guo Ma

Copyright © 2014 Lu Zeng et al. 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

Different crystalline calcium silicate hydrates CSH were synthesized under specific hydrothermal conditions and several methods were used to analyze samples. Amorphous calcium silicate hydrates ACSH mainly consists of disordered calcium silicate hydrate gel C-S-H gel and crystalline calcium silicate hydrates CCSH consists of crystallized tobermorite. The adsorption of carcinogenic aflatoxin B1 AFB1 onto ACSH and CCSH was investigated. The adsorption kinetics was studied using pseudo-first-order and pseudo-second-order kinetic models and intraparticle diffusion model. The pseudo-second-order model provided the best correlation and the intraparticle diffusion controlled the adsorption process of AFB1 onto CCSH. Adsorption isotherm parameters were obtained from Langmuir and Freundlich and the adsorption data fitted to Freundlich much better. Based on the results of N2 adsorption-desorption, adsorption kinetics, and adsorption isotherms, the adsorption mechanism of AFB1 onto CCSH was developed. All results indicate that CCSH has a great potential to be a safe, easy-made, and cost-effective material for the control of AFB1 contamination.





Author: Lu Zeng, Ligang Yang, Shuping Wang, and Kai Yang

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



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