锌基金属有机框架材料对三甲胺的吸附性能研究

吕道飞; 林洁玲; 许锋; 袁文兵; 张妍; 陈忻

doi:10.12131/20220160

锌基金属有机框架材料对三甲胺的吸附性能研究

doi: 10.12131/20220160

佛山科学技术学院环境与化学工程学院，广东佛山 528000

基金项目: 国家自然科学基金项目 (22108034)；广东省基础与应用基础研究基金联合基金项目 (2020A1515110945)；广东省教育厅科研项目 (2022KTSCX122)；广东省海洋经济发展 (海洋六大产业) 专项资金 (粤自然资合〔2020〕036号)；佛山市新型多孔材料工程技术研究中心项目 (2020001003999)

详细信息

作者简介:
吕道飞 (1993—)，男，讲师，博士，研究方向为多孔材料脱腥除臭。E-mail: 473766259@qq.com

通讯作者:
陈　忻 (1968—)，女，教授，博士，研究方向为高端海洋生物化妆品。E-mail: chenxin@fosu.edu.cn

中图分类号: S 985.2
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- 被引次数: 0
出版历程
- 收稿日期: 2022-06-07
- 修回日期: 2022-07-18
- 录用日期: 2022-07-19
- 网络出版日期: 2022-07-23
- 刊出日期: 2022-12-05

Study on adsorption performance of zinc-based metal-organic framework for trimethylamine

School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China

摘要

摘要: 海产品富含蛋白质等多种活性物质，广泛应用于食品和化妆品行业。如何高选择性地脱除海产品中三甲胺 (Trimethylamine, TMA) 等腥味物质，是目前海产品加工过程中面临的难题。通过X射线粉末衍射、扫描电子显微镜等对沸石咪唑骨架材料-8 (ZIF-8)、美孚石油公司5号沸石 (ZSM-5) 分子筛和活性氧化铝材料进行表征，研究了这3种材料对典型腥味物质三甲胺的吸附性能。吸附动力学测试表明，在200 mg·L⁻¹的三甲胺溶液中，3种吸附剂在600 min左右达到吸附饱和。测试3种吸附剂在25 ℃下的吸附等温线，发现其对三甲胺的吸附容量为：ZIF-8 (517.1 mg·g⁻¹) >活性氧化铝 (401.8 mg·g ⁻¹) > ZSM-5 (390.3 mg·g ⁻¹)。同等条件下，ZIF-8对三甲胺的吸附量是活性炭的3.2倍，其吸附性能超过同期的大多数材料。傅里叶变换红外光谱和Zeta电位测试表明，ZIF-8和三甲胺间的吸附作用为C-H···π作用、C-H···N作用及静电作用。
- 三甲胺 /
- 吸附 /
- 沸石咪唑骨架材料-8 (ZIF-8) /
- 美孚石油公司5号沸石 (ZSM-5) /
- 活性氧化铝
Abstract: Rich in proteins and other active substances, seafoods have been widely used in the food and cosmetic industries. How to remove fishy substances such as trimethylamine from seafoods with high selectivity is a challenge for the current seafood processing. In this paper, zeolite imidazole framework-8 (ZIF-8), zeolites socony mobil-5 (ZSM-5) and activated alumina were characterized by powder X-ray diffraction and scanning electron microscopy, and their adsorption performance for the typical fishy substance (Trimethylamine) was also investigated. Adsorption kinetics tests show that the adsorption saturation of the three adsorbents reached at about 600 min in a 200 mg·L⁻¹ trimethylamine solution. The adsorption isotherms of the three adsorbents at 25 ℃ were tested and their adsorption capacities for trimethylamine followed a descending order of ZIF-8 (517.1 mg·g⁻¹) > activated alumina (401.8 mg·g ⁻¹) > ZSM-5 (390.3 mg·g ⁻¹). Under the same conditions, the adsorption uptake of trimethylamine on ZIF-8 was 3.2 times higher than that on activated carbon, exceeding those of most materials in the same period. Fourier transform infrared spectroscopy tests and Zeta potential tests show that the adsorption interactions between ZIF-8 and trimethylamine were dominated by C-H···π interaction, C-H···N interaction and electrostati force.
- Trimethylamine /
- Adsorption /
- ZIF-8 /
- ZSM-5 /
- Activated alumina

HTML全文

图 1 ZIF-8的PXRD图谱

Figure 1. PXRD patterns of ZIF-8

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图 2 ZSM-5 (a) 和活性氧化铝 (b) 的实验PXRD图谱

Figure 2. Experimental PXRD patterns of ZSM-5 (a) and activated alumina (b)

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图 3 在77 K下吸附剂对N₂的吸附脱附等温线 (a) 和吸附剂的孔径分布图 (b)

Figure 3. Adsorption and desorption isotherm of N₂ by adsorbent (a) and pore size distribution of adsorbent (b) at 77 K

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图 4 在×50 000放大倍率下ZIF-8的SEM显微照片

Figure 4. SEM image of ZIF-8 at ×50 000 magnification

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图 5 ZIF-8 (a、b)、ZSM-5 (c) 和活性氧化铝 (d) 吸附前、吸附后和三甲胺的红外谱图

Figure 5. Infrared spectra of ZIF- 8 (a, b), ZSM-5 (c) and activated alumina (d) before and after adsorption of trimethylamine

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图 6 ZIF-8、ZSM-5和活性氧化铝的吸附动力学曲线

Figure 6. Adsorption kinetic curves of ZIF-8, ZSM-5 and activated alumina

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图 7 ZIF-8、ZSM-5和活性氧化铝的伪二级动力学模型拟合结果

Figure 7. Fitting results of pseudo second-order kinetic model for ZIF-8, ZSM-5 and activated alumina

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图 8 ZIF-8、ZSM-5和活性氧化铝在25 ℃下的吸附等温线

Figure 8. Adsorption isotherms of ZIF-8, ZSM-5 and activated alumina at 25 ℃

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图 9 吸附温度对 ZIF-8，ZSM-5 和活性氧化铝吸附200 mg·L⁻¹三甲胺吸附量的影响

Figure 9. Effect of temperature on adsorption performance of trimethylamine (200 mg·L⁻¹) on ZIF-8, ZSM-5 and activated alumina

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图 10 ZIF-8、ZSM-5和活性氧化铝的循环再生性能

Figure 10. Regeneration performance of ZIF-8, ZSM-5 and activated alumina

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