煤化工渣高效吸附去除水中全氟辛酸

doi:10.13278/j.cnki.jjuese.20200053

吉林大学学报(地球科学版) ›› 2021, Vol. 51 ›› Issue (6): 1853-1862.doi: 10.13278/j.cnki.jjuese.20200053

煤化工渣高效吸附去除水中全氟辛酸

刘娜^1,2, 王金鑫^1,2, 焦昕倩^1,2, 雒峰^3,4

1. 吉林大学新能源与环境学院, 长春 130021;
2. 教育部地下水资源与环境重点实验室(吉林大学), 长春 130021;
3. 吉林大学材料科学与工程学院, 长春 130022;
4. 教育部汽车材料实验室(吉林大学), 长春 130022

收稿日期:2020-04-07 出版日期:2021-11-26 发布日期:2021-11-24
通讯作者: 雒锋(1986-),男,高级工程师,主要从事固体废弃物再利用方面的研究,E-mail:luofeng@jlu.edu.cn E-mail:luofeng@jlu.edu.cn
作者简介:刘娜(1977-),女,教授,博士生导师,主要从事环境污染治理与修复方面的研究,E-mail:liuna@jlu.edu.cn
基金资助:
国家自然科学基金项目（41572217）；国家"111"项目（B16020）

Removal of Perfluorooctanoic Acid (PFOA) in Aqueous Solution Using Highly Adsorptive Coal Chemical Slag

Liu Na^1,2, Wang Jinxin^1,2, Jiao Xinqian^1,2, Luo Feng^3,4

1. College of New Energy and Environment, Jilin University, Changchun 130021, China;
2. Key Laboratory of Groundwater Resources and Environment(Jilin University), Ministry of Education, Changchun 130021, China;
3. School of Materials Science and Engineering, Jilin University, Changchun 130022, China;
4. Key Laboratory of Automobile Materials(Jilin University), Ministry of Education, Changchun 130022, China

Received:2020-04-07 Online:2021-11-26 Published:2021-11-24
Supported by:
Supported by the National Natural Science Foundation of China (41572217) and the "111" Project of China (B16020)

摘要/Abstract

摘要： 为高效快速去除水中全氟辛酸，选择工业废物煤化工渣对全氟辛酸进行吸附去除探究。采用不同的处理方法制备了4种煤化工渣（粒径从大到小为CGA1、CGA2、CGA3和CGA4），研究其在水溶液中的全氟辛酸吸附性能。利用扫描电子显微镜（SEM）、拉曼光谱、傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）对4种煤化工渣的结构特征进行表征分析，并考察了全氟辛酸初始质量浓度和初始pH对吸附进程的影响。实验结果表明：煤化工渣对全氟辛酸有高效的吸附能力，伪二级动力学模型和Langmuir等温模型可以较好地描述4种煤化工渣对全氟辛酸的吸附行为及过程，其中CGA4去除全氟辛酸的最大吸附量为25.51 mg/g；随着全氟辛酸溶液初始质量浓度升高，煤化工渣对全氟辛酸的吸附容量逐渐增加；初始pH对CGA3和CGA4的影响微弱，CGA1和CGA2在酸性条件下显示出更优越的吸附性能。由此得出，4种煤化工材料中粒径最小的CGA4具有最优的全氟辛酸去除能力且基本不受pH限制。FTIR分析表明，吸附过程中氢键的形成占主导地位，XPS和Zeta电位检测结果表明，物理吸附和静电吸附在去除过程中也发挥了重要作用。

关键词: 煤化工渣, 全氟辛酸, 吸附, 废物利用

Abstract: Industrial waste coal chemical residues were selected as absorbent to remove perfluorooctanoic acid (PFOA) in water. Four kinds of coal chemical slag (particle size range from large to small was CGA1, CGA2, CGA3, and CGA4) prepared by different treatment methods were used to evaluate their sorption performance for PFOA. Scanning electron microscope (SEM), Raman, Fourier transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS) were used to characterize the structures of the four kinds of coal chemical slag, and the effects of initial concentration and pH of the PFOA solution on the adsorption process were investigated. The results showed that the absorbents had high efficiency for PFOA removal. The adsorption was well described by the pseudo-second-order kinetic model and the Langmuir isothermal model. With the increase of the initial concentration of PFOA solution, the adsorption capacity of the coal chemical slag for PFOA increased gradually. The initial pH value had almost no impact on CGA3 and CGA4; While for CGA1 and CGA2, it showed better adsorption performance under acidic conditions than alkaline conditions. It is concluded that CGA4 (the smallest particle size) has the best PFOA removal ability and is almost unrestricted by pH. The maximum adsorption capacity of CGA4 is 25.51 mg/g. The FTIR analysis suggested that the formation of hydrogen bonds dominates the adsorption process. The results of XPS and zeta potential showed that physical and electrostatic adsorption also plays important roles in the removal progress. Therefore, coal chemical slag can be used as a promising adsorbent to remove the difficult-to-treat pollutants and promote the recycling of waste and sustainable development.

Key words: coal chemical slag, perfluorooctanoic acid, adsorption, waste disposal

中图分类号:

X705

刘娜, 王金鑫, 焦昕倩, 雒峰. 煤化工渣高效吸附去除水中全氟辛酸[J]. 吉林大学学报(地球科学版), 2021, 51(6): 1853-1862.

Liu Na, Wang Jinxin, Jiao Xinqian, Luo Feng. Removal of Perfluorooctanoic Acid (PFOA) in Aqueous Solution Using Highly Adsorptive Coal Chemical Slag[J]. Journal of Jilin University(Earth Science Edition), 2021, 51(6): 1853-1862.

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煤化工渣高效吸附去除水中全氟辛酸

Removal of Perfluorooctanoic Acid (PFOA) in Aqueous Solution Using Highly Adsorptive Coal Chemical Slag

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