WANG Qun ,CHENG Yue ,ZHENG Peng
( Jingdezhen Ceramic Institute, Jingdezhen 333001)
Abstract: Molecular sieves were obtained by the hydrothermal synthesis at 100℃ for 10 hours of sol prepared in accordance with the molar ratio Al2O3∶SiO2: Na2O: H2O = 1: 14∶ 6∶ 250 using pretreated coat fly ash as primary raw materials. XRD analysis showed that the products of zeolite have the structural characteristics of NaY zeolite, and SEM characterization revealed that they had more uniform particle size of zeolite and the size is 3~5um. Adsorption and degradation of methylene blue test showed when the addition of NaY molecular sieve adsorbents was 2.5g/L, the initial solution of methylene blue concentration was 1.0mg /L, and the pH value was around 7, the decolorization rate and the degradation rate were 90.81% and 98.27%,respectively. This provides a basis for the synthesis and application of Y-type zeolite with coal fly-ash.
Keywords: coal fly ash, hydrothermal synthesis，NaY zeolite, adsorption