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Application of flocculation-reverse osmosis technology
in the treatment of fluoride-containing mine water

Authors： YANG Guangwei1, ZHANG Weizheng1, WANG Leyi2,LI Wenguo1, SUN Qifei2, SONG Feifei1, LUAN Yiqiu1, WANG Xinyan1

Units： 1. Shandong Zhaojin Motian Co.,Ltd., Zhaoyuan 265400， China； 2. Shandong Zhaojin Group Co., Ltd., Yantai 264000， China

KeyWords： mine water inflow; fluoride removal; flocculation; sedimentation; reverse osmosis

ClassificationCode：TQ028

year,volume(issue):pagination： 2025,45(3):163-169

Abstract：

Fluoride contamination in mine water poses significant risks to ecological environments and drinking water safety. Addressing the challenge of 8 000 m3/d fluoride-containing mine water (3~10 mg/L F-) from Xiadian Gold Mine, this study systematically evaluated mainstream defluorination technologies. A flocculation-precipitation coupled reverse osmosis (RO) membrane process was proposed. Results demonstrated that flocculation pretreatment achieved 80%~90% turbidity reduction and synergistically removed 50%-80% fluoride. Subsequent RO treatment further reduced fluoride to 0.2~0.58 mg/L, The effluent water quality stably exceeds the Class I standards of the Comprehensive Emission Standards for Water Pollutants in Watersheds-Part 5: Peninsula Watershed (DB 37/3416.5-2018) and meets the Class II water source water quality requirements of the Environmental Quality Standards for Surface Water (GB 3838-2002).The integrated process maintained stable operation with a low cost of 0.916 yuan/ton and exhibited strong resistance to influent fluctuations. This research provides an economically viable and technically robust solution for defluorination of high-fluoride mine water, particularly suitable for large-scale applications with moderate-to-high fluoride concentrations and stable water flux. The findings hold significant implications for ecological protection and water resource recycling in mining regions.

Funds：

山东省重点研发计划重大科技创新工程（2023CXGC010902）

AuthorIntro：

杨光炜（1977-）女，山东招远人，硕士研究生，高级经济师，高级工程师，研究方向为环境工程及环境生态保护

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