Files
Document type
ArticleVersion
Accepted versionPublication date
All rights reserved
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/64163
Synthesis of merlinoite from Chinese coal fly ashes and its potential utilization as slow release K-fertilizer
Journal Title
Director/Tutor
Journal ISSN
Volume Title
Related resource
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.
Subject
Subject (English)
Citation
Citation
LI, Jing, et al. Synthesis of merlinoite from Chinese coal fly ashes and its potential utilization as slow release K-fertilizer. Journal of Hazardous Materials. 2014. Vol. 265, num. 242-252. ISSN 0304-3894. [consulted: 9 of August of 2026]. Available at: https://hdl.handle.net/2445/64163