Synthesis of aluminum-substituted tobermorite and the application on the phosphorus removal from waste water

Ling LiMinistry of Education Key Laboratory for the Synthesis and Application of Organic Function Molecules, Hubei University, Wuhan, ROC, Tel. +86 2788662747, Fax: +86 2788663043Correspondence[email protected]

Zheng Xi WuMinistry of Education Key Laboratory for the Synthesis and Application of Organic Function Molecules, Hubei University, Wuhan, ROC, Tel. +86 2788662747, Fax: +86 2788663043

Ya Xiong LiMinistry of Education Key Laboratory for the Synthesis and Application of Organic Function Molecules, Hubei University, Wuhan, ROC, Tel. +86 2788662747, Fax: +86 2788663043

Huai Li ShaMinistry of Education Key Laboratory for the Synthesis and Application of Organic Function Molecules, Hubei University, Wuhan, ROC, Tel. +86 2788662747, Fax: +86 2788663043

Gong Wu SongMinistry of Education Key Laboratory for the Synthesis and Application of Organic Function Molecules, Hubei University, Wuhan, ROC, Tel. +86 2788662747, Fax: +86 2788663043

Abstract

An Al-substituted tobermorite was prepared by hydrothermal treatment using 4A-zeolite, sodium silicate, and calcium hydroxide. The X-ray diffraction (XRD) patterns and FT-TR spectra confirmed that tobermorite was formed after the hydrothermal process. The removal of phosphorous using the synthesized tobermorite was studied. XRD patterns, FT-TR spectra, and scanning electron microscope (SEM) images showed the formation of hydroxyapatite after p-elimination. It was found that the best solid/liquid ratio is 1.0 g/L and the best pH value is 9. Kinetic models and thermodynamic parameters of p-elimination were discussed, and the p-elimination process was proved to follow pseudo-second-order rate kinetics; it was spontaneous and endothermic.

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Synthesis of aluminum-substituted tobermorite and the application on the phosphorus removal from waste water

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Synthesis of aluminum-substituted tobermorite and the application on the phosphorus removal from waste water

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