Abstract A novel retrievable bifunctional magnetic nano-structure (sodium dichloroisocyanurate immobilized on the Fe3O4@SiO2@Si(CH2)3Cl surface) was synthesized. Its antibacterial performance as water disinfectant successfully evaluated. The value of Minimum Bactericidal Concentration (625 ppm) and Minimum Inhibitory Concentration (314.5 ppm) show that magnetic nano-structure is a very effective antibacterial structure against the E. coli bacteria. In addition the viability of bacteria (%) was evaluated at different contact time against magnetic nano-structure. The disinfection procedure is very clean without any residual cyanuric acid in water. In other hand, oxidizing performance of nano-structure against the azo dye (acid red-18) was evaluated which attributed to the releasing HOCl in water. Kinetic of dye removal was measured at 0.01, 0.05, 0.1, and 0.5 g of nano-structure. Reducing pH and increasing temperature leads to increased Acid Red 18 degradation. Chemical oxygen demand (COD) measurement shows the effectiveness of nano-structure in acid red-18 degradation. The nano-structure turns to be magnetically retrievable, clean disinfectant, wastewater treatment agent, and its chlorine can be regenerated simply by exposure to household bleach such as Ca(OCl)2.

中文翻译：

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将 N-Halo（二氯异氰尿酸钠）锚定在纳米 Fe 3 O 4 表面作为“氯水库”：抗菌性能和废水处理

摘要 合成了一种新型的可回收双功能磁性纳米结构（固定在 Fe3O4@SiO2@Si(CH2)3Cl 表面的二氯异氰尿酸钠）。成功评价了其作为水消毒剂的抗菌性能。最低杀菌浓度 (625 ppm) 和最低抑菌浓度 (314.5 ppm) 的值表明磁性纳米结构是一种非常有效的抗大肠杆菌细菌的抗菌结构。此外，在不同接触时间针对磁性纳米结构评估细菌的生存力（%）。消毒过程非常干净，水中没有任何残留的氰尿酸。另一方面，评估了纳米结构对偶氮染料（酸性红-18）的氧化性能，这归因于在水中释放 HOCl。染料去除动力学测量值为 0.01、0.05、0。1、0.5克纳米结构。降低 pH 值和升高温度会导致酸性红 18 降解增加。化学需氧量 (COD) 测量显示纳米结构在酸性红 18 降解中的有效性。纳米结构变成了磁性可回收、清洁的消毒剂、废水处理剂，其氯可以通过接触家用漂白剂如 Ca(OCl)2 来再生。