化工进展 ›› 2022, Vol. 41 ›› Issue (12): 6586-6605.DOI: 10.16085/j.issn.1000-6613.2022-0369

• 资源与环境化工 • 上一篇    下一篇

磁性生物质炭的制备及在污染水体中的应用

宋少花1(), 徐金兰2, 宋晓乔1, 于媛1   

  1. 1.西安建筑科技大学华清学院,陕西 西安 710043
    2.西安建筑科技大学环境与市政工程学院,陕西 西安 710055
  • 收稿日期:2022-03-11 修回日期:2022-07-02 出版日期:2022-12-20 发布日期:2022-12-29
  • 通讯作者: 徐金兰
  • 作者简介:宋少花(1988—),女,讲师,硕士,研究方向为石油污染土壤修复技术及水污染控制。E-mail:915998273@qq.com
  • 基金资助:
    国家自然科学基金(51778524);陕西省教育厅专项科研计划(21JK0738);2021年西安建筑科技大学华清学院大学生创新训练项目(S202113679014)

Preparation of magnetic biochar and its application in polluted water

SONG Shaohua1(), XU Jinlan2, SONG Xiaoqiao1, YU Yuan1   

  1. 1.Huaqing College, Xi’an University of Architecture and Technology, Xi’an 710043, Shaanxi, China
    2.School of Environmental and Municipal Engineering, Xi’an University of Architecture & Technology, Xi’an 710055, Shaanxi, China
  • Received:2022-03-11 Revised:2022-07-02 Online:2022-12-20 Published:2022-12-29
  • Contact: XU Jinlan

摘要:

介绍了磁性生物质炭的制备方法及所需的原料,尤其是在污染水体中的应用。阐述了磁性生物质炭的制备方法,包括浸渍-热解法、液相还原法、共沉淀法和物理混合法,并指出各种制备方法的优缺点。重点分析了磁性生物质炭吸附污染物的影响因素及机理,发现磁性生物质炭的热解温度及投加量、溶液的pH、反应时间、污染物的初始浓度、吸附温度和溶液中其他竞争离子等对污染物吸附效果都有一定的影响,而且其吸附机理比较复杂,关键的吸附机理包括物理吸附、离子交换、静电吸附、共沉淀、表面络合等。详细总结磁性生物质炭在污染水体中的应用,磁性生物质炭已广泛用于去除水体中的各种污染物,包括重金属、无机阴离子、抗生素、农药、有机染料及核污染物。此外,还对磁性生物质炭的再生和回收进行了评价。

关键词: 污染物, 磁性生物质炭, 吸附, 去除机理

Abstract:

The preparation method and required raw materials of magnetic biomass charcoal are introduced, especially the application in polluted water.The preparation methods of magnetic biochar including impregnation-pyrolysis, liquid-phase reduction, co-precipitation and physical mixing are expounded, and the advantages and disadvantages of various preparation methods are pointed out. The influencing factors and mechanism of the adsorption of pollutants by magnetic biochar are mainly analyzed. It is found that the pyrolysis temperature and dosage of magnetic biochar, the pH value of the solution, the reaction time, the initial concentration of pollutants, the adsorption temperature and other competing ions in the solution have a certain influence on the adsorption effect of pollutants. Moreover, its adsorption mechanism is complex, and the key adsorption mechanisms include physical adsorption, ion exchange, electrostatic adsorption, co-precipitation, and surface complexation. The application of magnetic biochar in polluted water is summarized in detail. Magnetic biochar has been widely used to remove various pollutants in water, including heavy metals, inorganic anions, antibiotics, pesticides, organic dyes and nuclear pollutants. In addition, the regeneration and recovery of magnetic biomass carbon are evaluated.

Key words: pollutant, magnetic biochar, adsorption, removal mechanism

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