工业水处理 ›› 2025, Vol. 45 ›› Issue (10): 141-154. doi: 10.19965/j.cnki.iwt.2024-0815

• 试验研究 • 上一篇    

MIL-53(Fe)对MB、Cr(Ⅵ)及其复合污染体系吸附特性对比研究

钟晨晨1(), 石小雪1, 董季玲1,2(), 王明媚3, 刘洋1, 蒋伟1   

  1. 1. 重庆科技大学化学化工学院,重庆 401331
    2. 重庆科技大学冶金与动力工程学院,重庆 401331
    3. 重庆瑞信电子材料有限公司,重庆 401220
  • 收稿日期:2025-07-25 出版日期:2025-10-20 发布日期:2025-11-05
  • 通讯作者: 董季玲
  • 作者简介:

    钟晨晨(1999— ),硕士,E-mail:

  • 基金资助:
    重庆市教委科学技术研究项目(KJQN202101511); 重庆市研究生教育“课程思政”示范项目(YKCSZ23186)

Comparative study on the adsorption characteristics of MIL-53(Fe) on MB, Cr(Ⅵ) and their composite pollution systems

Chenchen ZHONG1(), Xiaoxue SHI1, Jiling DONG1,2(), Mingmei WANG3, Yang LIU1, Wei JIANG1   

  1. 1. School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
    2. School of Metallurgy and Power Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
    3. Chongqing Ruixin Electronic Materials Co. , Ltd. , Chongqing 401220, China
  • Received:2025-07-25 Online:2025-10-20 Published:2025-11-05
  • Contact: Jiling DONG

摘要:

工业废水中的复杂有害成分导致传统吸附材料在处理其复合污染物时面临吸附效率低、循环稳定性差等挑战,而金属有机框架材料(MOFs)凭借其可调控的孔结构和表面化学性质在此领域展现出显著优势。通过溶剂热法合成MIL-53(Fe),系统对比其在MB或Cr(Ⅵ)单污染体系及MB-Cr(Ⅵ)复合污染体系中的吸附特性。结果表明,单污染体系中实验条件下Cr(Ⅵ)最大吸附量为13.68 mg/g,MB最大吸附量为266.90 mg/g;复合污染体系中在室温避光环境下向100 mL MB-Cr(Ⅵ)混合溶液中投加5 mg MIL-53(Fe) ,当溶液中MB质量浓度为50 mg/L,Cr(Ⅵ)质量浓度为10 mg/L,溶液初始pH为6,吸附时间为80 min时,Cr(Ⅵ)吸附量达到7.72 mg/g,MB吸附量达到253.85 mg/g。不论是在单污染体系中,还是在复合污染体系中,吸附过程均符合准二级动力学模型(R 2>0.999)和Langmuir等温吸附模型(R 2>0.993);热力学分析证实室温下MIL-53(Fe)对MB-Cr(Ⅵ)的吸附可自发进行。值得注意的是,复合体系中Cr(Ⅵ)吸附量较单污染体系中显著降低,揭示了共存污染物间的竞争行为。材料经5次循环使用后平衡吸附量维持率>50%,且在含K⁺、Na⁺、Ca²⁺等干扰离子的模拟废水中表现出优异选择性,彰显了其在实际废水处理中的应用潜力。

关键词: 金属有机框架, 亚甲基蓝, Cr(Ⅵ), 吸附

Abstract:

The complex harmful components in industrial wastewater pose challenges to traditional adsorption materials in treating composite pollutants, such as low adsorption efficiency and poor cycling stability. Metal-organic framework(MOFs) have shown significant advantages in this field due to their controllable pore structure and surface chemical properties. MIL-53 (Fe) was synthesized by solvothermal method, and its adsorption characteristics were systematically compared in MB or Cr(Ⅵ) single pollution system and MB-Cr(Ⅵ) composite pollution system. The results showed that under the experimental conditions in a single pollution system, the maximum adsorption capacity of Cr(Ⅵ) was 13.68 mg/g, and the maximum adsorption capacity of MB was 266.90 mg/g. In a composite pollution system, 5 mg of MIL-53 (Fe) was added to 100 mL of MB-Cr(Ⅵ) mixed solution at room temperature in a dark environment. When the mass concentration of MB in the solution was 50 mg/L, the mass concentration of Cr(Ⅵ) was 10 mg/L, the initial pH of the solution was 6.0, and the adsorption time was 80 min, the adsorption capacity of Cr(Ⅵ) reached 7.72 mg/g, and the adsorption capacity of MB reached 253.85 mg/g. Whether in a single pollution system or a composite pollution system, the adsorption process conformed to the quasi-second order kinetic model (R 2>0.999) and Langmuir isotherm model (R 2>0.993). Thermodynamic analysis confirmed that MIL-53 (Fe) could spontaneously adsorb MB-Cr(Ⅵ) at room temperature. It was worth noting that the adsorption capacity of Cr(Ⅵ) in the composite system was significantly reduced as compared to the single pollution system, revealing the competitive behavior among coexisting pollutants. The material exhibited a preservation rate of equilibrium adsorption capacity exceeding 50% after 5 cycles of use, and exhibited excellent selectivity in simulated wastewater containing interfering ions such as K+, Na+, Ca2+, demonstrating its potential for practical wastewater treatment.

Key words: metal organic framework, methylene blue, Cr(Ⅵ), adsorption

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