化学结晶循环造粒流化床诱导地下水中铁-锰-硬度共结晶去除小试

王旋; 赵峥; 杨亚欣; 贾涛涛; 赵海亮; 杜娟娟; 张博; 张小卫; 冯延魁; 梁健; 胡瑞柱; 黄廷林; 龚慧

doi:10.13205/j.hjgc.202610007

化学结晶循环造粒流化床诱导地下水中铁-锰-硬度共结晶去除小试

doi: 10.13205/j.hjgc.202610007

1. 西安水务(集团)有限责任公司, 西安 710048;
2. 西安水务(集团)规划设计研究院有限公司, 西安 710061;
3. 陕西省天然气股份有限公司, 西安 710016;
4. 西安建筑科技大学环境与市政工程学院, 西安 710055

基金项目:

2023陕西省建设科技计划项目“地下水源给水厂高品质供水工艺中钙-铁-锰共结晶去除优化技术研究”（2023-K63）

详细信息

作者简介:
王旋（1977—），男，副高级工程师，主要研究方向为饮用水处理技术。284287831@qq.com

通讯作者:
黄廷林（1962—），男，教授，主要研究方向为水处理理论与技术。huangtinglin@xauat.edu.com

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出版历程
- 收稿日期: 2025-10-22
- 网络出版日期: 2026-11-10

Lab-scale experimental study on induced co-crystallization removal of iron， manganese， and hardness from groundwater in a chemical crystallization cyclic granulation fluidized bed

1. Xi'an Water Affairs Group Co., Ltd., Xi'an 710048, China;
2. Xi'an Water Affairs (Group) Planning and Design Research Institute Co., Ltd., Xi'an 710061, China;
3. Shaanxi Natural Gas Co., Ltd., Xi'an 710016, China;
4. School of Environment and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

摘要

摘要: 地下水及部分工业用水中普遍存在高硬度以及铁、锰离子超标的问题，研究采用诱导结晶工艺对该类水质进行处理，通过流化床系统开展动态试验，系统研究了晶种类型、静床层高度、上升负荷、NaOH投加量对处理效果的影响，并通过SEM-EDS、XRD与FTIR对反应前后晶种的表面形貌和成分变化进行表征分析。结果表明：方解石晶种的诱导结晶性能最佳，在静床层高度70 cm，上升负荷35 m/h，NaOH 投加量200 mg/L的优化参数条件下，Ca²⁺去除率为69.40%，Fe²⁺去除率为64.50%，Mn²⁺去除率为72.82%。表征结果显示，反应前后晶种表面由光滑转变为粗糙，伴随大量沉积物生成；EDS检测到Fe在晶种表面明显富集；XRD与FTIR进一步证实晶种表面存在Ca、Fe以及Mn的复合沉积层，揭示了吸附、共沉淀与异相成核的协同作用机制。该研究表明诱导结晶法可作为一项高效预处理工艺，实现水质软化的同时有效降低铁、锰浓度，为处理同类复杂组分地下水提供了理论依据与技术参考。
- 地下水软化 /
- 铁离子去除 /
- 锰离子去除 /
- 共结晶 /
- 协同去除
Abstract: Groundwater and certain industrial water sources commonly exhibit elevated hardness and excessive iron/manganese concentrations. In this study， an induced co-crystallization process was employed to address these water quality issues， and dynamic experiments were conducted in a chemical crystallization cyclic granulation fluidized bed. The effects of seed crystal type， static bed height， upflow velocity， and NaOH dosage on treatment efficiency were systematically investigated. The morphological and compositional changes of the seed crystals before and after the reaction were characterized using scanning electron microscopy-energy dispersive X-ray spectroscopy （SEM-EDS）， X-ray diffraction （XRD）， and Fourier transform infrared spectroscopy （FTIR）. The results indicated that calcite seed crystals achieved the optimal induced co-crystallization performance. The optimal parameters were determined as a static bed height of 70 cm， an upflow velocity of 35 m/h， and an NaOH dosage of 200 mg/L. Under these conditions， the removal efficiencies reached 69.40% for Ca²⁺， 64.50% for Fe²⁺， and 72.82% for Mn²⁺. Characterization results revealed that the initially smooth seed crystal surfaces became rough with substantial precipitate formation. EDS analysis detected significant iron enrichment on the crystal surfaces， while XRD and FTIR analysis further confirmed the presence of composite co-deposition layers containing Ca， Fe， and Mn， revealing a synergistic mechanism involving adsorption， co-precipitation， and heterogeneous nucleation. This study demonstrates that the induced co-crystallization process can serve as an efficient treatment technology， achieving simultaneous water softening and iron/manganese removal， thereby providing a theoretical basis and technical reference for treating groundwater with similarly complex water quality.
- groundwater softening /
- iron ion removal /
- manganese ion removal /
- co-crystallization /
- synergistic removal

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