Open AccessGreen synthesis of fly ash‐based zeolite Y by mixed alkali fusion method
Author(s) -
Shi Bin,
Chang Qing
Publication year - 2021
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mna2.12083
Subject(s) - zeolite , fly ash , adsorption , alkali metal , ammonium , materials science , chemical engineering , langmuir adsorption model , solvent , specific surface area , chemistry , nuclear chemistry , inorganic chemistry , waste management , organic chemistry , catalysis , composite material , engineering
Abstract A solvent‐free process was used to synthesize high‐purity zeolite Y from fly ash. Different from the traditional two‐step method, fly ash was activated efficiently by mixed alkali of NaOH and Na 2 CO 3 at 750 °C for 2 h. For prepared zeolite Y, the composition, phase structure, morphology, specific surface areas and ammonium adsorption were evaluated comprehensively. The results show that a single phase zeolite Y with octahedral structure and an average diameter of 2.5 μm is obtained. The Brunauer–Emmett–Teller surface area is as high as 503.34 m 2 /g. Ammonium adsorption isotherm model on obtained zeolite Y was more consistent with the Langmuir model ( R 2 > 0.99). And the maximum adsorption capacity is 18.6 mg/g. It can be concluded that the study provides an economic process to utilize fly ash for the synthesis of zeolite Y, which is an excellent adsorbent to remove ammonium. In addition, this study provides an eco‐friendly approach to synthesize low‐cost zeolite Y from solid waste, which is of excellent adsorption for ammonium removal.