工业水处理 ›› 2023, Vol. 43 ›› Issue (11): 154-160. doi: 10.19965/j.cnki.iwt.2022-1055

• 试验研究 • 上一篇    下一篇

镍掺杂MIL-53(Fe)吸附亚甲基蓝性能研究

杨赟1(), 赵莹鑫2, 王玉龙2, 杨水金2()   

  1. 1. 汉江师范学院化学与环境工程学院,湖北 十堰 442000
    2. 湖北师范大学化学化工学院,湖北 黄石 435002
  • 收稿日期:2023-07-26 出版日期:2023-11-20 发布日期:2023-11-21
  • 作者简介:

    杨赟(1989— ),博士,副教授。E-mail:

    杨水金,博士,教授。E-mail:

  • 基金资助:
    湖北省教育厅科学研究计划重点科研项目(D20213102); 湖北省教育厅科研计划一般项目(Q20213101); 十堰市引导性科研项目(21Y12)

Study on the adsorption performance of nickel doped MIL-53(Fe) for methylene blue

Yun YANG1(), Yingxin ZHAO2, Yulong WANG2, Shuijin YANG2()   

  1. 1. College of Chemistry and Environmental Engineering, Hanjiang Normal University, Shiyan 442000, China
    2. College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China
  • Received:2023-07-26 Online:2023-11-20 Published:2023-11-21

摘要:

利用溶剂热法制备了Ni-MIL-53(Fe)复合材料,通过改变液相体系的pH、温度、浓度等条件对Ni-MIL-53(Fe)吸附亚甲基蓝(MB)的性能进行了探究。结果表明,Ni-MIL-53(Fe)吸附MB的最优pH为6,在一定的考察区间内,吸附量随MB初始质量浓度和温度的升高而逐渐升高。Ni-MIL-53(Fe)对MB的吸附过程符合Langmuir等温吸附模型和二级动力学模型,323 K下最大理论吸附量可达198.8 mg/g。303、313、323 K温度下Ni-MIL-53(Fe)吸附MB的ΔG均小于0,证明该复合材料吸附MB的过程是自发进行的;ΔΗ>0,说明该复合材料对MB的吸附是吸热反应。Ni-MIL-53(Fe)再生循环利用5次后对MB的去除率依然良好,说明该复合材料循环利用性能良好。

关键词: MIL-53(Fe), 镍掺杂, 吸附性能, 金属有机骨架, 亚甲基蓝

Abstract:

Ni-MIL-53(Fe) composite material was prepared by solvothermal method. The adsorption performance of methylene blue(MB) by Ni-MIL-53(Fe) was investigated by changing the pH,temperature and concentration of the liquid phase system. The experimental results showed that the optimal pH for Ni-MIL-53(Fe) to adsorb MB were 6. Within a certain inspection range,the adsorption capacity gradually increased with the increase of the initial mass concentration of MB and temperature. It was found that the adsorption process of MB by Ni-MIL-53(Fe) was consistent with Langmuir isothermal adsorption model and second-order kinetic model,and when the temperature was 323 K,the maximum theoretical adsorption capacity could reach 198.8 mg/g. ΔG of MB adsorption by Ni-MIL-53(Fe) at temperatures 303,313 and 323 K were all less than 0,indicating that the process of MB adsorption on the composite material was spontaneous. ΔΗ>0 indicated that the adsorption of MB on the composite material was an endothermic reaction. After 5 cycles of Ni-MIL-53(Fe) regeneration and reuse,the removal rate of MB was still good,indicating that the composite material had good recycling performance.

Key words: MIL-53(Fe), nickel doped, adsorption property, metal-organic frameworks, methylene blue

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