【摘要】 为实现结构、生态与净化性能的协同提升，采用壳聚糖与生物炭复合改性，制备新型壳聚糖/生物炭改性生态混凝土，并系统研究其多功能综合性能。通过X射线衍射(XRD)、扫描电子显微镜(SEM)、抗压强度与孔隙率测试分析其微观结构与力学特征；同时开展30d植物生长与净水实验评估其生态修复与水质净化能力。结果表明：当壳聚糖/生物炭复合掺量为6%时，混凝土抗压强度达14.05MPa,满足河岸边坡稳定性要求；孔隙率为29.63%,形成有利于水分和养分交换的多级孔结构。与未改性及单一改性组相比，复合改性材料显著提高香蒲生物量和叶绿素含量，并显著降低水体总氮、总磷和化学需氧量，去除率分别达53.82%、88.31%和57.95%。研究表明，壳聚糖与生物炭的界面协同作用实现了混凝土力学、生态与净化性能的同步增强，为河岸防护与水体生态修复提供了一种可持续的多功能绿色建材。更多还原

【Abstract】 To achieve the synergistic enhancement of structural, ecological, and purification performances, a novel chitosan/biochar-modified ecological concrete was prepared through chitosan and biochar composite modification.Its multifunctional properties were systematically investigated.X-ray diffraction(XRD),scanning electron microscopy(SEM),and mechanical tests were used to analyze its microstructure and mechanical characteristics.Simultaneously, 30-day plant growth and water purification experiments were conducted to assess its ecological restoration and water purification capabilities.The results showed that when the chitosan/biochar composite dosage was 6%,the concrete exhibited a compressive strength of 14.05MPa, meeting the stability requirements for riparian slopes.The porosity reached 29.63%,forming a hierarchical pore structure that was favorable for water and nutrient exchange.Compared with the unmodified and single-modified groups, the composite material significantly increased Typha orientalis biomass and chlorophyll content, and markedly reduced total nitrogen, total phosphorus, and chemical oxygen demand in overlying water by 53.82%,88.31%,and 57.95%,respectively.These findings demonstrated that the interfacial synergy between chitosan and biochar enabled the simultaneous enhancement of mechanical, ecological, and purification performances, offering a sustainable multifunctional green material for riparian protection and water ecosystem restoration.更多还原