Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/64163
Title: Synthesis of merlinoite from Chinese coal fly ashes and its potential utilization as slow release K-fertilizer
Author: Li, Jing
Zhuang, Xinguo
Font, Oriol, 1968-
Moreno, Natalia
Vallejo, V. Ramón (Victoriano Ramón)
Querol, Xavier
Tobias, Aurelio
Keywords: Recuperació de terres
Carbó
Xina
Zeolites
Combustió
Fecundació
Reclamation of land
Coal
China
Zeolites
Combustion
Fertilization (Biology)
Issue Date: 30-Jan-2014
Publisher: Elsevier B.V.
Abstract: This study focuses on the synthesis of merlinoite from Chinese coal fly ashes by KOH direct conversion method, with special emphasis on the application of synthetic merlinoite as fertilizer. These fly ashes were collected from two pulverized-coal combustion (PCC) power plants in Xinjiang, Northwest China. The synthesis results are influenced by fly ash characteristics and different synthesis conditions (KOH solution concentrations, activation temperature, time, and KOH/fly ash ratios). A high quality merlinoite-rich product was synthesized under optimal activation conditions (KOH concentration of 5 M, activation temperature of 150 °C, activation time of 8 h and KOH/fly ash ratio of 2 l/kg), with a cation exchange capacity (CEC) of 160 cmol kg−1. The synthetic merlinoite is proved to be an efficient slow release K-fertilizer for plant growth, indicating that it can be widely used for high-nutrient demanding crops growing in nutrient-limited soils and for large-area poor soil amendment in opencast coal mine areas around the power plants that will substantially grow with the increasing coal combustion in Xinjiang in the near future.
Note: Versió postprint del document publicat a: http://dx.doi.org/10.1016/j.jhazmat.2013.11.063
It is part of: Journal of Hazardous Materials, 2014, vol. 265, p. 242-252
Related resource: http://dx.doi.org/10.1016/j.jhazmat.2013.11.063
URI: http://hdl.handle.net/2445/64163
ISSN: 0304-3894
Appears in Collections:Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)

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