Synthesis and Adsorption Properties of High Active MgO

化学工业与工程

Chemcial Industry and Engineering

2017, Vol. 34

Issue (5) :1-10 DOI: 10.13353/j.issn.1004.9533.20151092

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Synthesis and Adsorption Properties of High Active MgO

Wang Suping^1,2,3, Li Xianggao^1,2,3, Wang Shirong^1,2,3, Xiao Yin^1,2,3

1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China;
3. Tianjin Engineering Research Center of Functional Fine Chemicals, Tianjin 300072, China

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Abstract

The magnesium oxide was prepared by the hydrothermal treatment-thermal decomposition method and the carbonation-thermal decomposition method using the normal magnesium hydroxide as raw material. The former method was to obtain magnesium oxide by calcining the hexagonal magnesium hydroxide precursor, which was prepared by hydrothermal treatment me-thod. The later method was to obtain high active magnesium oxide by calcining flower-like hy-dromagnesite or nesquehonite whisker, which was prepared by the carbonation method. The ef-fects of calcining temperature and soaking time on the activity of magnesium oxide were studied. The results showed that the high active MgO was prepared by nesquehonite whisker precursor, which had the CAA value of 8.45 s, iodine adsorption value of 264.14 mg·g^-1. The adsorption performances of MgO have been also studied in lead solution. The results of adsorption were conformed to Langmuir model, and maximum adsorption was 364 mg·g^-1.

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	Wang Suping
	Li Xianggao
	Wang Shirong
	Xiao Yin

Keywords： magnesium oxide； activity； calcination； adsorption； Pb²⁺

Received 2015-05-18;

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Wang Suping, Li Xianggao, Wang Shirong, Xiao Yin.Synthesis and Adsorption Properties of High Active MgO[J] Chemcial Industry and Engineering, 2017,V34(5): 1-10

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