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Physicochemical Performance of Fluorine-Containing Sludge and Its Effect on Cement Properties and Environmental Safety
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Tingshu HE1, Minhao WANG1, Yongqi DA1, Yun FENG2, Zhen LI3
Journal of the Chinese Ceramic Society | 2020, 48(8) : 1295 - 1301
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Journal of the Chinese Ceramic Society | 2020, 48(8): 1295-1301
• Research Articles •
Physicochemical Performance of Fluorine-Containing Sludge and Its Effect on Cement Properties and Environmental Safety
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Tingshu HE1, Minhao WANG1, Yongqi DA1, Yun FENG2, Zhen LI3
Affiliations
  • 1.College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
  • 2.Qian Yang Conch Venture Environmental Technology Co. Ltd, Baoji 721100, Shaanxi, China
  • 3.Xi'an Yao Bai Environmental Technology Engineering Co. Ltd, Xi'an 710100, China

    • HE Tingshu (1965-), male, Ph.D., Professor. E-mail:

About Author:

HE Tingshu (1965-), male, Ph.D., Professor. E-mail:

Published: 2020-08-20 doi: 10.14062/j.issn.0454-5648.20190773
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It is necessary to concern the safe utilization of the fluorine-containing sludge disposed in landfills due to its possible leaching toxicity. The effect of physicochemical performance of fluorine-containing sludge, used in cement kiln on the cement properties and environmental safety was investigated by X-ray fluorescence, X-ray diffraction, scanning electron microscopy, immersion extraction and leaching toxicity tests. The results show that the fluorine content of fluorine-containing is 15.3% with a small amount of heavy metal ions (e.g. Cr, Mn, Ni, Cu, Zn, etc.). Fluorite is the major mineral phase, and secondary mineral phases are sphalerite and nantokite. Fluorine in fluorine-containing sludge is mostly calcium fluoride, and its content (mass fraction) reaches approximately 30.0% in the sludge. In addition, the leaching toxicity of F and Cr is below the toxicity restriction. However, the leaching toxicity of Ni, Cu and Zn is above the toxicity restriction. Therefore, the fluorine-containing sludge is subordinate to a heavy metal solid hazardous waste. Also, the incorporation of fluorine-containing sludge assists the formation of alite, and improves slightly the compressive strength of cement mortars. Meanwhile, 2.0% (mass fraction) fluorine-containing sludge doped cement could not cause the secondary environment risk after curing age of 28 d.

fluorine-containing sludge  /  fluorine occurrence form  /  cement kiln co-processing  /  environmental safety
何廷树, 王敏豪, 达永琪, 冯云, 李榛. 含氟污泥的理化性质及其对水泥性能和环境安全性的影响. 硅酸盐学报, 2020 , 48 (8) : 1295 -1301 . DOI: 10.14062/j.issn.0454-5648.20190773
Tingshu HE, Minhao WANG, Yongqi DA, Yun FENG, Zhen LI. Physicochemical Performance of Fluorine-Containing Sludge and Its Effect on Cement Properties and Environmental Safety[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (8) : 1295 -1301 . DOI: 10.14062/j.issn.0454-5648.20190773
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Article Info
doi: 10.14062/j.issn.0454-5648.20190773
  • Receive Date：2019-12-02
  • Online Date：2026-10-29
  • Published：2020-08-20
Article Data
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History
  • Received：2019-12-02
  • Revised：2020-01-07
Funding
Affiliations
    1.College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
    2.Qian Yang Conch Venture Environmental Technology Co. Ltd, Baoji 721100, Shaanxi, China
    3.Xi'an Yao Bai Environmental Technology Engineering Co. Ltd, Xi'an 710100, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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