Synthesis of Zeolite/Aluminum Oxide Hydrate from Coal Fly Ash: A New Type of Adsorbent for Simultaneous Removal of Cationic and Anionic Pollutants
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- 作者：Jie Xie ; Zhe Wang ; Deyi Wu ; Zhenjia Zhang ; Hainan Kong
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2013
- 出版时间：October 23, 2013
- 年：2013
- 卷：52
- 期：42
- 页码：14890-14897
- 全文大小：307K
- 年卷期：v.52,no.42(October 23, 2013)
- ISSN：1520-5045
文摘
Since the first successful synthesis of zeolite from coal fly ash (ZFA) in 1985, the preparation and application of ZFA has been intensively investigated to recycle the solid waste. However, problems arising from the waste alkaline solution have rarely been addressed to date. This study initiated a novel method to synthesize ZFA/Al2O3 hybrid material by introducing a reaction step involving the neutralization of the waste alkaline solution with soluble Al salts into the traditional ZFA synthesis route. When compared with ZFA, ZFA/Al2O3 was found to have a significantly higher CEC. The increases of the BET surface area and phosphate-immobilization capacity were even more dramatic, with the former increasing by 2鈥? times and the latter increasing by 2鈥? times. The hybrid material had a significantly lower alkalinity than ZFA. The results also showed that the effluent from the production of the hybrid material could be much more environmentally friendly.