Abstract
The influences of roasting activation on the particle morphology, microscopic structure, and adsorption properties of natural clinoptilolites were investigated. The experimental results show that the optimal modified conditions include a calcination temperature at 400 °C, a roasting time of 0.5 h, and furnace cooling. The ammonia nitrogen removal rate from analog renewable water of the modified clinoptilolites reached 72% in the optimized conditions, which is 12% higher than that of natural ones. Scanning electron microscopy analysis showed that the surface morphology changed, the micro-hole size increased, and the surface became smoother and more uniform after calcination. The single-point total adsorption average pore width increased from 7.74 nm to 10.64 nm.
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Funded by the National Natural Science Foundation of China (No. 51174017)
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Lin, H., Jin, X., Dong, Y. et al. Influence of calcination on the physical characteristics and nitrogen removal performance of clinoptilolites. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 29, 1099–1103 (2014). https://doi.org/10.1007/s11595-014-1049-6
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DOI: https://doi.org/10.1007/s11595-014-1049-6