本文综述了用粉煤灰合成沸石的方法,详细叙述了传统碱性溶液下粉煤灰转化成沸石实验过程,强调在不同的实验条件下可以合成不同类型的沸石.粉煤灰合成沸石主要采用两种方法:直接转化法和两步转化法.文中还讲述了不同种类沸石在废水处理中表现出的潜能,根据文献中的实验数据表明从废水中去除重金属离子是沸石的主要性能之一,不同种类的沸石在废水处理中吸附重金属离子能力不同.并为粉煤灰合成沸石提出新的发展方向.
This paper provided an overview on the methodologies for zeolite synthesis from fly ash (FA),and a detailed description of conventional alkaline conversion processes,with special emphasis on the experimental conditions to obtain different zeolite types. Zeolitic products could be obtained from FA by direct conversion and two-step conversion. A review of potential applications of different zeolitic products for waste water was also given. The examination of the data presented by different authors reveals that one of the main potential application of this material is the uptake of heavy metal ions from polluted waste waters. The adsorption capacity was different according to zeolites type. A new direction with zeolite synthesized from FA is gived.
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