酸碱回收对粉煤灰合成沸石性能的影响-北京玛格泰克科技发展有限公司.PDF

中国环境科学 2014,34(9) ：2217~2222 China Environmental Science 酸碱回收对粉煤灰合成沸石性能的影响 * 骆其金,谌建宇 ,王振兴,罗 隽,庞志华,林方敏 (环境保护部华南环境科学研究所,广东 广州 510655) 摘要：针对粉煤灰合成沸石合成成本较高及废酸碱外排污染环境的问题,对粉煤灰合成人工沸石工艺中废酸碱回收的可行性及其对合成沸 石产品性能的影响进行了试验研究,研究设置 3 个废酸碱回收利用比例条件(1:1,2:1,3:1),其他合成条件与初始粉煤灰合成沸石完全相同.利 用 SEM、XRD 、BET 等技术对合成产品进行表征,结果表明回收酸合成沸石(WAC-ZFA) 、回收碱合成沸石(WAL-ZFA)表面存在大量孔隙 结构,XRD 图谱也存在尖锐的沸石衍射峰,表征结果与粉煤灰合成沸石(ZFA)相似;在 BET 方面,与 ZFA 相比,WAC-ZFA 有所下降,而 WAL-ZFA 明显增大;废碱回收比例对合成沸石除氨的效果影响不大,而废酸回收比例对合成沸石除氨的效果影响较明显,综合考虑,建议在 实际生产中废酸回收比例宜≤1:1,废碱回收比例宜≤3:1. 关键词：回收酸碱；粉煤灰合成沸石；氨氮 中图分类号：X705 文献标识码：A 文章编号：1000-6923(2014)09-2217-06 Research of recycling of waste acid or alkali and its impacts on the properties of zeolites synthesized from fly ash. * LUO Qi-jin, CHEN Jian-yu , WANG Zhen-xing, LUO Jun, PANG Zhi-hua, LIN Fang-ming (South China Institute of Environmental Sciences, MEP, Guangzhou 510655, China). China Environmental Science, 2014,34(9)：2217~2222 Abstract ：In order to reduce the production cost and control the environmental pollution caused by waste acid and alkali discharge, the process experiments of waste acid and alkali recycling and the relevant impacts on the properties of zeolites synthesized from fly ash were carried out. Under the similar experimental conditions, three recycling ratio 1:1,2:1,3:1were tested The physical-chemical characteristics of products was analyzed through SEM, XRD and BET. The results show that waste acid-zeolites synthesized from fly ash (WAC-ZFA) and waste alkali-zeolites synthesized from fly ash (WAL-ZFA) has the similar physical-chemical properties of zeolites synthesized from fly ash (ZFA), sharp diffraction peaks and a large number of pore structure characterization on the surface observed as well. Compared with ZFA, the BET of WAC-ZFA is slightl