生物炭以其优良的污染物吸附效果受到关注，但不易从溶液中分离的难题限制了其应用。通过与磁性介质结合，将生物炭磁化，使其能够在磁场作用下实现固液分离，是解决该问题的有效方法。综述了磁性生物炭复合材料的结构类型及制备方法，分析了影响产物属性的浸渍比率、热解温度、保留时间等因素，并重点介绍了在重金属离子和有机污染物治理中的应用。最后对磁性生物炭发展趋势及该研究领域存在的问题进行了探讨。
Biochar has become a rising concern due to its good effect of pollutants adsorption,but the poor ad-sorbent-water separation limits its practical application.Magnetizing biochar by binding of the magnetic medium is an effective method to solve this problem,which could realize the solid-liquid separation under the magnetic field.The structure types and preparation methods of magnetic biochar composite materials are summarized in this paper.The factors influencing properties of final product are analyzed,such as pyrolytic temperature,resi-dence time,and mass ratio of magnetic precursors to biomass feedstock.Applications of such magnetic carbon materials in treatment of heavy metals and organic pollutants are introduced in detail.Some discussions are also carried out on the limitation and development tendency in this research area.
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