Sewage containing heavy metal ions (HMIs) has caused serious damage to ecological environment and human health when discharged without treatment. In this work, a practical filter has been made with cellulose/zinc oxide/magnesium hydroxide (CelZnMg) ternary composite prepared a simple hydrothermal method. The characterizations show that granular ZnO and lamellar Mg(OH) evenly distribute on cellulose. The electrostatic attraction drives the coupling of cellulose and ZnO/Mg(OH), and the formed CelZnMg is significantly stabilized by interfacial hydrogen bonds and dative bonds. On the other hand, the cellulose substrate also immobilizes the recovered HMIs and completely and easily separates them from wastewater. The ternary composite has outstanding bifunctional performance. Its Mg(OH) component offers high HMIs-removing capability; for instance, of Cd and Cu in 400 mL 500 mg·L solution reaches 693.2 and 764.6 mg·g respectively. The ZnO moiety endows the antibacterial property, which inhibits the growth of and . The inhibition effect indicates that cellulose in the composite is stable during application. Due to its multiple merits, the CelZnMg filter would be a perspective candidate for the use as water treatment agent.

中文翻译：

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用于固定废水中重金属离子的纤维形态纤维素衍生三元复合过滤器

含有重金属离子的污水未经处理排放，对生态环境和人类健康造成严重损害。在这项工作中，采用简单的水热方法制备了纤维素/氧化锌/氢氧化镁（CelZnMg）三元复合材料，制成了实用的过滤器。表征表明，颗粒状 ZnO 和层状 Mg(OH) 均匀分布在纤维素上。静电引力驱动纤维素和ZnO/Mg(OH)的偶联，形成的CelZnMg通过界面氢键和配位键显着稳定。另一方面，纤维素基质还固定了回收的 HMI，并完全且轻松地将它们与废水分离。三元复合材料具有优异的双功能性能。其 Mg(OH) 成分具有较高的 HMIs 去除能力；例如，400 mL 500 mg·L溶液中Cd和Cu的含量分别达到693.2和764.6 mg·g。ZnO部分赋予抗菌特性，抑制 和 的生长。抑制效果表明复合材料中的纤维素在应用过程中是稳定的。由于其多种优点，CelZnMg 过滤器将成为水处理剂的理想候选者。