研究文章

木质素基改性多孔碳的构建及其对水中微塑料的去除性能研究

摘要

随着全球塑料产量的持续增长,微塑料(MPs)作为一种新兴的持久性有机污染物,在水环境中的积累已引发广泛关注。由于其粒径微小且化学性质稳定,传统的净水工艺难以实现对其的高效拦截。本研究提出了一种变废为宝的绿色治理方案:以造纸工业副产物脱碱木质素为碳源前驱体,通过“发泡固化—高温炭化—镁盐改性”的一体化工艺,成功制备了具有三维贯通孔隙结构的镁改性木质素基多孔碳(Mg/CF)。以聚苯乙烯(PS)为目标污染物开展的吸附实验表明,Mg/CF表现出卓越的去除性能,最大吸附容量达到117.48mg/g,约为未改性材料的5.5倍。动力学拟合分析证实,吸附过程符合准二级动力学模型,揭示了其作为一种多活性位点参与的非均相化学吸附过程。本研究不仅为生物质资源的高值化利用提供了新途径,也为水体微塑料污染的低成本、高效治理提供了科学依据。

关键词

木质素;多孔碳;镁改性;微塑料;吸附去除

参考

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