LIU Chang-jiang1, MA Hong-wen2*, Gao Yuan2, Gu Xiao-bin1
(1. College of Gemology and Materials Technology, Hebei GEO University, Shijiazhuang 050031, China;
2. School of Materials Science and Technology, China University of Geosciences Beijing, Beijing 100083, China)
Abstract: Analcime belongs to pore zeolite. It can be a natural mineral as well as a synthetic zeolite. Due to its stable structural stability, the formation of analcime is thermodynamically controlled in the Na2O-Al2O3-SiO2-H2O system It can be easily synthesized using various SiO2- and Al2O3-bearing raw materials. The ion exchange reaction of analcime by other cations, occurred in two forms due to different ion radii, could result in the formation of various analcime-leucite series minerals. In agriculture, the nutrient elements, such as K and N, loaded analcime is a new type of potential eco-fertilizer with both soil remediation and nutrient slow/controlled release properties. In wastewater treatment, analcime acts as proper adsorbent for adsorbing various metallic ions, with specific effect for the sequestration of radioactive elements. In petrochemicals, analcime is limitedly used for the catalytic oxidation of few small molecules. From the viewpoint of green ecology, the hydrothermal treatment of solid wastes, further toxic ions treatment, soil remediation, and slowly/controlling released fertilizer are efficiently comprehensive utilization ways for analcime minerals which were prepared in the process for making potassium salts from potassium-rich rocks.
Keywords: Analcime; leucite; ammonioleucite; pollucite; slowly released fertilizer; wastewater treatment
ACTA MINERALOGICA SINICA Vol. 39, No.5, 2019, page 568-576
