Water pollution arising from pharmaceuticals has raised great concerns about the potential risks for biosphere and human health. However, rapid and efficient removal of pharmaceutical contaminants from water remains challenging. Wood sawdust, a byproduct of the wood-processing industry, is an abundant, cost-effective, and sustainable material with a unique hierarchically porous microstructure. These features make wood sawdust quite interesting as a filtration material. Here, we report a novel cross-flow filtration composite based on β-cyclodextrin-polymer-functionalized wood sawdust (β-CD/WS) in which the pharmaceutical contaminant water flows through the sawn-off vessel channels and the micropores on the surface of the cell walls, generating the turbulence. Such water flow characteristics ensure full contact between pharmaceutical pollutants and β-CD grafted on the cellulose backbone of wood sawdust, thereby enhancing the water treatment efficiency. Consequently, the β-CD/WS filter device shows a high removal efficiency of over 97.5% within 90 s for various pharmaceutical contaminants including propranolol, amitriptyline, chlortetracycline, diclofenac, and levofloxacin, and a high saturation uptake capacity of 170, 156, 257, 159, and 185 mg g^–1, respectively. The high-performance wood-sawdust-based cross-flow filtration opens new avenues for solving the global water pollution issues, especially those caused by pharmaceutical contaminants.

中文翻译：

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β-环糊精在生物质木屑的错流通道中聚合，可快速高效去除水中的药物污染物。

药品引起的水污染引起了人们对生物圈和人类健康潜在风险的极大关注。然而，快速有效地从水中去除药物污染物仍然具有挑战性。锯末是木材加工业的副产品，是一种丰富，具有成本效益且可持续的材料，具有独特的多孔层次结构。这些特征使木屑作为过滤材料非常有趣。在这里，我们报告了一种新型的基于β-环糊精-聚合物功能化木屑（β-CD/ WS）的错流过滤复合材料，其中药物污染水流经锯齿状容器通道和表面的微孔细胞壁，产生湍流。这种水流特性确保了药物污染物与接枝在木屑纤维素主链上的β-CD之间的充分接触，从而提高了水处理效率。因此，β-CD/ WS过滤器在90 s内对包括普萘洛尔，阿米替林，金霉素，双氯芬酸和左氧氟沙星在内的各种药物污染物的去除效率高达97.5％，并且饱和吸收能力高达170、156、257 ，159和185毫克/克分别为^–1。高性能的基于木屑的错流过滤技术为解决全球水污染问题（尤其是由制药污染物引起的水污染问题）开辟了新途径。