This article describes the impregnation of copper nanoparticles (CuNP) in a polyester fibre filter that can be used in solid–gas filtration to retain the spread of pathogen microorganisms in indoor environments. The impregnation of the CuNP was achieved by spraying the suspension on the surface of filter media. An acid pretreatment was also evaluated to increase the adhesion between fibre and nanoparticle. The synthesis of the CuNP was done by chemical reduction. The bacterial effect was measured through the contact method for Escherichia coli and Staphylococcus aureus, and we demonstrate that the presence of CuNP to filter media reduced up to 99.99% of gram-negative and 99.98% of gram-positive bacteria. The pretreatment with HCl was a good alternative to filter modification due to the higher adhesion between CuNP and the fibre while the high efficiency against pathogen microorganisms was kept. The modification of filters with CuNP can improve the air quality of indoor environments, vanishing the pathogen microorganisms circulating in the air.

中文翻译：

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使用合成铜纳米粒子预防室内空气通风系统中的病原体微生物

本文描述了在聚酯纤维过滤器中浸渍铜纳米颗粒 (CuNP)，该过滤器可用于固气过滤，以阻止病原体微生物在室内环境中的传播。CuNP的浸渍是通过将悬浮液喷洒在过滤介质的表面上来实现的。还评估了酸预处理以增加纤维和纳米颗粒之间的粘附性。CuNP的合成是通过化学还原完成的。细菌效应通过大肠杆菌和金黄色葡萄球菌的接触法测定，并且我们证明在过滤介质中存在 CuNP 可减少高达 99.99% 的革兰氏阴性菌和 99.98% 的革兰氏阳性菌。由于 CuNP 和纤维之间的粘附性更高，同时保持了对病原体微生物的高效率，用 HCl 预处理是过滤器改性的一个很好的替代方案。用CuNP对过滤器进行改性可以改善室内环境的空气质量，消除空气中循环的病原微生物。