粉煤灰基X型沸石分子筛的合成制备及其去除氨性能研究  

Synthesis of Pure X Zeolite Sieve from Coal Fly Ash for Ammonium Removal

作　　者：李晓光 赵颖[2] 康得军[3] 卓锦德[1] 龚斌 杨天学[2] 张颖[2] 曾宇平[4] 管伟雄[2] LI Xiao-guang;ZHAO Ying;KANG De-jun;JOW Jinder;GONG Bin;YANG Tian-xue;ZHAND Ying;ZENG Yu-ping;GUAN Wei-xiong(Advanced Materials and Analysis Center,National Institute of Clean-and-Low-Carbon Energy(NICE),Beijing 102211,China;State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing100012;College of Civil Engineering,Fuzhou University,Fuzhou350108,China;State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai200050,China)

机构地区：[1]北京低碳清洁能源研究所,先进材料与分析测试中心,北京102211 [2]中国环境科学研究院,环境基准与风险评估国家重点实验室,北京100012 [3]福州大学土木工程学院,福州350108 [4]中国科学院上海硅酸盐研究所,高性能陶瓷和超微结构国家重点实验室,上海200050

出　　处：《硅酸盐通报》2018年第11期3663-3668,共6页Bulletin of the Chinese Ceramic Society

基　　金：2016年基本科研业务费项目(2016YSKY-029);北京建筑大学未来城市设计高精尖创新中心开放课题(UDC 2017032512)。

摘　　要：粉煤灰是燃煤电站的主要副产物,是全球性的重大环境问题,对公众健康和环境污染构成威胁。本研究提出了一种利用工业废弃物粉煤灰合成制备X型沸石分子筛的有效工艺,系统分析了不同条件下,固体碱预处理和引入晶种对合成X型沸石分子筛性能的影响,探讨了X型沸石分子筛对铵离子去除率的影响。结果表明:OH^-浓度、Si/Al比、固液比、陈化时间和晶化时间对合成X型沸石分子筛的最化条件分别为0. 75 mol/L、2. 8、9 mL/g、0. 5 h和10 h,实现了对NH_4^+的高效去除。有效降低了分子筛制备成本,实现了粉煤灰的资源化、高值化利用,实现"以废治废"双赢目标。Coal fly ash was the major by-product in coal-fired power plants which has become the most abundant anthropogenic solid waste and caused some serious environmental problems. In this study,pure X zeolite sieve was successfully synthesized from coal fly ash using hydrothermal method,which included alkaline fusion and the introduction of seed crystal process. The removal efficiencies of ammonium by X zeolite sieve under different conditions were investigated. The results show that the optimization synthetic zeolite X conditions of the OH^-concentration,the Si/Al ratio,the solid liquid ratio,aging time,and crystallization time is 0. 75 mol/L,2. 8,9 mL/g,0. 5 h,and 10 h,respectively. This work provides an alternative economic and simple process to synthesize X zeolite sieve from coal fly ash. More importantly,it contributes to achieve the aim of waste control by waste and extend the great potential application and recycling of coal fly ash.

关 键 词：粉煤灰 X型沸石分子筛 晶种 氨氮去除 

分 类 号：X523[环境科学与工程—环境工程]