NIYu-ling,TIANShi-qi,WANGYu,et al.Research Progress of Fluoride Removal from Water via Induced Crystallization[J].China Water & Wastewater,2025,41(6):9-18.
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Research Progress of Fluoride Removal from Water via Induced Crystallization

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第41卷 Number: 第6期 Page: 9-18 Column: Date of publication: 2025-03-17
Author(s):
NI　Yu-ling1; 2;  TIAN　Shi-qi1; 2;  WANG　Yu3;  HU　Rui-zhu1; 2;  CHENG　Ya1; 2;  HUANG　Ting-lin1; 2;  WEN　Gang1; 2
（1. Northwest China Key Laboratory of Water Resources and Environment Ecology， School of Environmental and Municipal Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China； 2. Shaanxi Key Laboratory of Environmental Engineering， School of Environmental and Municipal Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China； 3. Shaanxi Water Affair Group Co. Ltd.， Xi’an 710000， China）
Keywords:
fluoride;  induced crystallization;  crystallization principle;  influencing factor;  fluidized bed reactor
Abstract:
The long-term presence of excess fluoride in the water environment poses a serious threat to human health, which has made fluoride removal technology a subject of widespread concern in recent years. This article summarizes the advantages and disadvantages of several major defluorination technologies. Among them, the induced crystallization method has become a research hotspot due to its advantages of low operating costs and suitability for treating raw water with a wide range of fluoride concentrations. The induced crystallization method accelerates the crystallization by manually adding appropriate seeds to remove fluoride. The induced crystallization method mainly uses natural mineral seeds such as fluorite, fluorapatite, quartz sand, and calcite. There are also some seeds that can be produced by artificial synthesis or microorganisms, but there have not yet been applied in practical engineering. In this process, the seed crystal growth process is very complicated, but it mostly conforms to the two-step growth model， which involves molecular diffusion first and then molecules entering the latticle. The principle， selection of seed crystals, influencing factors of induced crystallization defluorination technology were summarized in detail. The development of the induced crystallization defluorination reactors was also introduced, especially fluidized bed reactor has enabled the practical application of the induced crystallization method. Finally, the future delevopment direction of induced crystallization defluorination technology is proposed.
Last Update: 2025-03-17