竹纤维素/Mg-Al LDH复合气凝胶的制备及其对铬(CrO<sub>4</sub><sup>2-</sup>)的吸附性能研究

沈潇源; 段新朋; 金杨兵; 张平; 王喆; 金春德

竹纤维素/Mg-Al LDH复合气凝胶的制备及其对铬(CrO₄^2-)的吸附性能研究

浙江农林大学工程学院, 浙江杭州 311300

基金项目:

“十三五”国家重大研发计划课题研究任务（2017YFD0600804）；浙江农林大学科研发展基金项目（2020FR031）

详细信息

作者简介:
沈潇源,硕士研究生,从事机械工程研究。E-mail:17855831809@163.com。

通讯作者:
金春德,教授,从事木材科学与技术研究。E-mail:jincd@zafu.edu.cn

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出版历程
- 收稿日期: 2020-12-11
- 网络出版日期: 2021-09-10

Preparation of Bamboo Cellulose/Mg-Al LDH Composite Aerogel and Its Adsorption Performance for Chromium (CrO₄^2-)

Shool of Engineering, Zhejiang A & F University, Hangzhou 311300, Zhejiang, China

摘要

摘要: 以镁铝层状双氢氧化物（Mg-Al LDH）和竹浆纸为原料，通过球磨辅助物理共混和一步冷冻法，制备了具有水中CrO₄^2-吸附功能的竹纤维素/Mg-Al LDH复合气凝胶材料。详细研究了Mg-Al LDH的镁铝分子比、复合材料的用量比和水体pH值对竹纤维素/Mg-Al LDH复合气凝胶CrO₄^2-吸附性能的影响，并通过SEM、TEM、FT-IR、XRD和XPS对吸附前后气凝胶形貌、化学结构进行了表征，利用ICP-OES对吸附前后水体中CrO₄^2-浓度变化进行了测试。结果表明Mg-Al LDH在竹纤维骨架通道中生长良好，形成了三维层级多孔结构，比表面积为203.4 m²·g^-1；竹纤维素/Mg-Al LDH复合气凝胶对于CrO₄^2-的吸附性能明显优于Mg-Al LDH的吸附性能，且在较宽的pH（4-10）范围内表现稳定，最大吸附量可达28.60 mg·g^-1。
- 竹纤维素 /
- Mg-Al LDH /
- 复合气凝胶 /
- 吸附
Abstract: Magnesium-aluminum layered double hydroxide (Mg-Al LDH) and bamboo pulp paper were used as raw materials, and bamboo cellulose/Mg-Al LDH composite aerogels with adsorption function of CrO₄^2- in water were prepared by the methods of ball milling assisted physical blending and one-step freezing. The effects of Mg/Al molecular ratio of Mg-Al LDH, dosage ratio of composites and pH value of water on the adsorption properties of bamboo cellulose/Mg-Al LDH composite aerogel CrO₄^2- were studied in detail. The morphology and chemical structure of aerogel before and after adsorption were characterized by SEM, TEM, FT-IR, XRD and XPS, and the change of CrO₄^2- concentration was tested by ICP-OES. The results showed that Mg-Al LDH grew well in the bamboo fiber skeleton channel and formed a three-dimensional hierarchical porous structure with a specific surface area of 203.4 m²·g^-1. The adsorption performance of bamboo cellulose/Mg-Al LDH composite aerogel for CrO₄^2- was obviously better than that of Mg-Al LDH, and it was stable in a wide range of pH (4:10), and the maximum adsorption capacity reached 28.60 mg·g^-1.
- Bamboo cellulose /
- Mg-Al LDH /
- Composite aerogels /
- Adsorption

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参考文献(15)

[1]	高凡. 地下水的六价铬污染问题及控制对策[J]. 城市建设理论研究:电子版, 2015, 000(29):181-181.
[2]	Pantsar-Kallio M, Reinikainen S P, Oksanen M. Interactions of soil components and their effects on speciation of chromium in soils[J]. Analytica Chimica Acta, 2001, 439(1):9-17.
[3]	周友飞, 隋铭皓, 盛力. 层状双金属氢氧化物在有机污染物吸附方面的应用[J]. 水处理技术, 2012(11):1-7.
[4]	Nishino T, Arimoto N. All-cellulose composite prepared by selective dissolving of fiber surface[J]. Biomacromolecules, 2007, 8(9):2712-2716.
[5]	Roy D, Semsarilar M, Guthrie J T, et al. Cellulose modification by polymer grafting:a review[J]. Chemical Society Reviews, 2009, 38(7):2046-2064.
[6]	Liu S, Zhang L, Zhou J, et al. Fiberlike Fe₂O₃ Macroporous nanomaterials fabricated by calcinating regenerate cellulose composite fibers[J]. Chemistry of Materials, 2008, 20(11):3623-3628.
[7]	王莉娟. 镁铝水滑石及其煅烧产物吸附溶液中重金属阴离子的研究[D]. 长沙:中南大学, 2012.
[8]	Liang H W, Cao X, Zhang W J, et al. Robust and highly efficient free-standing carbonaceous nanofiber membranes for water purification[J]. Advanced Functional Materials, 2011, 21(20):3851-3858.
[9]	Liang H W, Guan Q F, Chen L F, et al. Macroscopic-scale template synthesis of robust carbonaceous nanofiber hydrogels and aerogels and their applications[J]. AngewandteChemie International Edition, 2012, 51(21):5101-5105.
[10]	熊业.竹质基核素捕捉剂的制备及性能研究[D]. 杭州:浙江农林大学. 2018.
[11]	BURKS T, AVILA M, AKHTAR F, et al. Studies on the adsorption of chromium (VI) onto 3-Mercaptopropionic acid coated superparamagnetic iron oxide nanoparticles[J]. Journal of colloid and interface science, 2014, 425:36-43.
[12]	陈福星, 周立祥. 生物催化合成的施氏矿物对废水中Cr(VI)的吸附[J]. 中国环境科学, 2006(1):11-15.
[13]	Crepaldi E L, Tronto J, Cardoso L P, et al. Sorption of terephthalate anions by calcined and uncalcinedhydrotalcite-like compounds[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2002, 211(2-3):103-114.
[14]	赵璐,薛静,贾文,等.竹材的氟硼酸钠/DDAC改性与性能表征[J].林产工业.2019,56(12):24-29 ,51.
[15]	刘悦,张力月,李志强,等.竹材在溶剂中的催化液化技术研究进展[J].林产工业.2019,46(7):3-6.