Preparation and Adsorption Performance of Hydroxyapatite/Attapulgite Composite Beads
- 作者：Li FengXiaofeng ShiZeshan LiuMaosen Ju
- 会议时间：2013-12-01
- 关键词：hydroxyapatite/ attapulgite composite beads ; preparation ; adsorption performance ; defluoridation
- 作者单位：Li Feng,Xiaofeng Shi(School of Chemical Engineering and Technology,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)Zeshan Liu(Jiangsu Yongguan Water Supply and Drainage Equipment Co.Ltd.,Xuzhou221116,Jiangsu,China)Maosen Ju(Chinese Agricultural Water-saving & Rural Drinking Water Supply Technology Association,Beijing100053,China)
- 母体文献：2013年水资源生态保护与水污染控制研讨会论文集
- 会议名称：2013年水资源生态保护与水污染控制研讨会
- 会议地点：哈尔滨
- 主办单位：中国环境科学学会
- 语种：chi
摘要
Hydroxyapatite/ attapulgite composite beads (HAP/ATT) were made through mixing hydroxyapatite and attapulgite at certain ratio and spheroidizing.Hydroxyapatite was synthetized by wet chemical methods at different calcium phosphorous ratio, and the product with the highest defluoridation capacity was selected as mission ball.The spheroidization process hasn't changed the structure and properties of hydroxyapatite characterized by FTIR and XRD.The adsorption process of HAP/ATT is influenced by adsorption time, temperature and pH value.The adsorption approaches to equilibrium within 80mins.High temperature is conducive to the adsorption process.The optimum pH value of adsorption process is about 3.The adsorption process is close to the monolayer adsorption.It is a spontaneous endothermic process (△Hθ> 0, △Gθ<0) and△Sθ is 0.0292KJ/ (mol.K) in the adsorption process.