In this work, two plant wastes were reused to fabricate the homogeneous 3D micro-nano porous structured humic acid/cellulose nanocomposite beads (IHA@CB) embedded with insoluble humic acid (IHA) particles. The subtle synthesis method attributed to the homogenous distribution of IHA particles in the cellulose matrix and improved the adsorption performance of IHA@CB for low concentration ciprofloxacin in water. Physical and chemical properties of the beads were characterized by SEM, EDX, XRD, FTIR, and the adsorption process of ciprofloxacin was studied by isotherm, kinetic and dynamic adsorption experiments. The maximum adsorption capacity of IHA@CB on CPX reached 10.87 mg g-1 under 318 K. The dynamic experiments were conducted by adjusting bed height, flow rate, initial concentration and pH values, and the regeneration experiments proved the adsorbent exhibited good repeatability. The adsorption mechanism was revealed that CPX was adsorbed by IHA@CB mainly through cation exchange.

中文翻译：

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一种简单而独特的设计策略，用于不溶性腐殖酸/纤维素纳米复合材料微珠，具有高浓度的低浓度环丙沙星在水中的吸附性能。

在这项工作中，两种植物废料被再利用以制造嵌入有不溶性腐殖酸（IHA）颗粒的均质3D微纳米多孔结构腐殖酸/纤维素纳米复合材料珠（IHA @ CB）。这种微妙的合成方法归因于IHA颗粒在纤维素基质中的均匀分布，并提高了IHA @ CB对水中低浓度环丙沙星的吸附性能。通过SEM，EDX，XRD，FTIR对微珠的理化性质进行了表征，并通过等温，动力学和动态吸附实验研究了环丙沙星的吸附过程。在318 K下，IHA @ CB在CPX上的最大吸附容量达到10.87 mg g-1。通过调节床高，流速，初始浓度和pH值进行动态实验，再生实验表明该吸附剂具有良好的重复性。吸附机理表明，CPX主要通过阳离子交换被IHA @ CB吸附。