[1]陈浩宇,施周,周石庆,等.硫酸亚铁强化混凝去除Cr(Ⅵ)和Ni(Ⅱ)的效能与机制[J].中国给水排水,2026,42(9):24-31.
　CHENHaoyu,SHIZhou,ZHOUShiqing,et al.Effectiveness and Mechanism of Ferric Sulfate Enhanced Coagulation for Synergistic Removal of Cr(Ⅵ) and Ni(Ⅱ)[J].China Water & Wastewater,2026,42(9):24-31.
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硫酸亚铁强化混凝去除Cr(Ⅵ)和Ni(Ⅱ)的效能与机制

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第42卷 期数: 2026年第9期 页码: 24-31 栏目: 出版日期: 2026-05-01
Title:
Effectiveness and Mechanism of Ferric Sulfate Enhanced Coagulation for Synergistic Removal of Cr(Ⅵ) and Ni(Ⅱ)
作者:
陈浩宇， 施周， 周石庆， 邓林
（湖南大学土木工程学院 水安全保障技术及应用湖南省工程研究中心，湖南 长沙 410082）
Author(s):
CHEN　Haoyu， SHI　Zhou， ZHOU　Shiqing， DENG　Lin
（Hunan Engineering Research Center of Water Security Technology and Application， College of Civil Engineering， Hunan University， Changsha 410082， China）
关键词:
硫酸亚铁;  Cr(Ⅵ);  Ni(Ⅱ);  混凝机理
Keywords:
ferrous sulfate;  Cr(Ⅵ);  Ni(Ⅱ);  coagulation mechanism
摘要:
硫酸亚铁（FeSO4）作为环境友好型絮凝剂，兼具还原性、絮凝性与沉淀性，凭借低毒、低成本及高效的特性，在重金属废水处理领域彰显出显著优势。然而，传统硫酸亚铁工艺存在混凝效果欠佳、出水带色的问题，且往往仅适用于单一重金属废水的处理，这制约了其在重金属去除领域的进一步推广与应用。针对上述技术瓶颈，开展了硫酸亚铁强化混凝协同去除Cr（Ⅵ）与Ni（Ⅱ）研究，并探讨了“还原-共沉淀-网捕”三重机制。以含Cr（Ⅵ）与Ni（Ⅱ）的复合重金属废水为处理对象，系统探究了FeSO4的协同处理机制。通过优化FeSO4投加量、Cr（Ⅲ）浓度及pH等关键参数，并结合SEM、XRD、XPS与FTIR等多尺度表征技术，揭示了“还原-共沉淀-网捕”的三重协同作用机理。实验结果显示，在pH=7、Fe（Ⅱ）与总Cr质量浓度比为1∶1的最佳条件下，总Cr、Ni（Ⅱ）以及总Fe的去除率分别高达98.6%、97.4%与99.0%。机理分析证实，Fe（Ⅱ）优先将Cr（Ⅵ）还原为Cr（Ⅲ），随后Cr（Ⅲ）与Fe（Ⅲ）形成稳定的共沉淀物，并通过表面羟基配位以及网捕作用进一步强化对重金属的去除效果。
Abstract:
Ferrous sulfate (FeSO4) is widely used as a reducing agent, coagulant, and precipitant in wastewater treatment. Compared to other coagulants, FeSO4 offers advantages such as low toxicity, environmental friendliness, and cost-effectiveness, demonstrating excellent application potential. However, due to the poor coagulation effect of traditional ferrous sulfate process, the treated water has a color and is usually only used to treat single heavy metal wastewater, which also limits the further promotion and practical application of ferrous sulfate in coagulation removal of heavy metals technology. In response to the aforementioned technical bottlenecks, this study proposed a triple mechanisms of Cr(Ⅵ)/Ni(Ⅱ) removal by ferrous sulfate-enhanced coagulation: reduction, co-precipitation, and net trapping.The synergistic treatment mechanism of FeSO4 for heavy metal wastewater containing Cr(Ⅵ) and Ni(Ⅱ) was systematically investigated. By adjusting key parameters including FeSO4 dosage, Cr(Ⅲ) concentration, and pH, and employing multi-scale characterization techniques such as SEM, XRD, XPS, and FTIR, the triple synergistic mechanism of “reduction-co-precipitation-net trapping” was elucidated. Experimental results showed that under optimal conditions [pH=7, mass concentration ratio of Fe(Ⅱ) to total Cr at 1∶1], the removal efficiencies of total Cr, Ni(Ⅱ), and total Fe reached 98.6%, 97.4%, and 99.0%, respectively. Mechanistic analysis revealed that Fe(Ⅱ) first reduces Cr(Ⅵ) to Cr(Ⅲ), followed by the formation of stable co-precipitates between Cr(Ⅲ) and Fe(Ⅲ). These precipitates further enhance heavy metal removal through hydroxyl coordination and net trapping effects.

相似文献/References:

[1]蓝伊淼,石明岩,林劭楠,等.类施氏矿物对工业废水中Cr(Ⅵ)的去除[J].中国给水排水,2023,39(19):101.
　LANYi-miao,SHIMing-yan,LINShao-nan,et al.Schwertmannite-like Mineral Materials for Removal of Cr(Ⅵ) from Industrial Wastewater[J].China Water & Wastewater,2023,39(9):101.

更新日期/Last Update: 2026-05-01