| Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences | Host |
| Citation: |
WANG Cheng, FENG Kai, WANG Lipeng, DU Fuling, YU Qianru. Comparison of Compositions, Structures and Properties of Several Natural Clinoptilolite Zeolites[J]. Conservation and Utilization of Mineral Resources, 2023, 43(2): 148-153. doi: 10.13779/j.cnki.issn1001-0076.2023.02.023
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Comparison of Compositions, Structures and Properties of Several Natural Clinoptilolite Zeolites
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Abstract
The natural clinoptilolite ores in China are widely distributed and rich in reserves, which are of great value for development and utilization. However, due to the difference of mineralization conditions, the composition, structure and properties of natural clinoptilolite from different places or even from different blocks in the same place have some differences, which affects its practical application. Therefore, it is necessary to investigate and compare the composition, structure and properties of natural clinoptilolite ores. The natural clinoptilolite ores from one place in Hebei (Z1) and two places in Liaoning (Z2 and Z3) were selected to study and compare their composition, structure, pH value, cation exchange capacity, and adsorption properties on heavy metal ions, water vapor and formaldehyde vapor. The results showed that the three natural zeolites were mainly composed of clinoptilolite, quartz and a small amount of calcite, and they contained SiO2, Al2O3, K2O, Na2O, Fe2O3, MgO, TiO2, CaO and a small amount of heavy metals. There were some differences in the mineral and chemical composition of the three samples. The Z2 sample showed relatively high adsorption efficiency of heavy metal ions, water vapor and formaldehyde gas, with the adsorption capacities of Cd2+, Cr3+, water vapor and formaldehyde gas for 14.89 mg/g, 6.65 mg/g, 21.33 mg/g and 7.12 mg/g, respectively, and this was related to its higher specific surface area, mesoporous volume and cation exchange capacity. This study provides some support for the selection, efficient utilization and environmental application of natural clinoptilolite ores.
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References
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WANG Cheng, FENG Kai, WANG Lipeng, DU Fuling, YU Qianru. Comparison of Compositions, Structures and Properties of Several Natural Clinoptilolite Zeolites[J]. Conservation and Utilization of Mineral Resources, 2023, 43(2): 148-153. doi: 10.13779/j.cnki.issn1001-0076.2023.02.023
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Figure 1.
XRD patterns of the three natural zeolites（a），TG−DTG curves（b），FITR spectra（c），particle size distribution curves（d）
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Figure 2.
N2 adsorption-desorption curves of the three natural zeolites
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Figure 3.
SEM （a，c，e） images and EDS spectra（b，d，f） of the three natural zeolites
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Figure 4.
Adsorption efficiencies of the three natural zeolites on Cd2+（a），Cr3+（b），water vapor（c） and formaldehyde gas（d）