粉煤灰合成NaX型分子筛的表征及其对Fe^(2+)离子的吸附研究  

Studies on synthesis,characterzation of zeolites NaX from fly ashes and adsorption of Fe^(2+) ion

作　　者：全桂英[1] 田冬[2] 

机构地区：[1]淮南师范学院物理系,淮南232001 [2]淮南师范学院化学系,淮南232001

出　　处：《环境工程学报》2011年第7期1637-1640,共4页Chinese Journal of Environmental Engineering

基　　金：安徽省教育厅自然科学基金资助项目(KJ2010B449;KJ2011B157)

摘　　要：以高温碱熔融处理粉煤灰合成了NaX型沸石分子筛,考察了不同水热晶化温度对产物结果的影响,用粉末XRD、XRF、SEM和FT-IR等手段对产品进行了表征,结果表明,以粉煤灰为原料用水热合成法合成微孔分子筛时,在晶化温度为90℃时能得到晶形较好的NaX型分子筛。同时考察了NaX分子筛的用量、时间和pH值等因素对Fe2+离子的吸附影响,在25 mL Fe2+离子浓度为2×103 mg/L的溶液中,当吸附剂用量为0.2 g,吸附时间为2 h,吸附效率达到最大值(36.41%),而随着溶液pH值的升高其吸附效率显著增大。A facile method was studied to synthesize zeolites NaX from coal fly ash by alkaline fusion route.The products at different hydrothermal treatment temperatures were characterized by XRF,XRD,SEM and FT-IR.It was found that zeolite NaX with high crystallinity could be synthesized from fused solution at 90 ℃ for 24 h.And the adsorptivity of Fe2＋ ion was studied at different pH,times,and qualities of the zeolites.The operation conditions were optimized when the quality of zeolite NaX was 0.2 g,the time of adsorption process was 2 h in 25 mL 2×103 mg/L Fe2＋ ion solution repectively.The adsorptivity of Fe2＋ ion achieved to the max value（36.41%）.And the efficiency of adsorption of Fe2＋ ion increased obviously with the pH of solution.

关 键 词：NaX分子筛 粉煤灰 吸附 Fe2+离子 

分 类 号：X705[环境科学与工程—环境工程]