Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
Chemosphere. 2013 Oct;93(4):619-25. doi: 10.1016/j.chemosphere.2013.06.010. Epub 2013 Jul 2.
This study investigated the dissolution, aggregation, and reaction kinetics of silver nanoparticles (AgNPs) with the three types of water disinfectants (ultraviolet, sodium hypochlorite, and ozone) under the different conditions of pH, ionic strength, or humic acid (HA). The physicochemical changes of AgNPs were measured by using UV-Vis spectroscopy, transmission electron microscopy, and inductively coupled plasma optical emission spectrometer. The results showed that when AgNPs contacted the disinfectants, oxidative dissolution was the primary reaction. In addition, the reaction kinetics studies revealed that the reaction rate of AgNPs with disinfectants was significantly influenced by different disinfectants along with different pH and the presence of sodium nitrate and HA. Our research demonstrated the potential effect of disinfectants on AgNPs, which will improve our understanding of the fate of AgNPs in the disinfection processes in the water and wastewater treatment plant.
本研究考察了在不同 pH 值、离子强度或腐殖酸 (HA) 条件下，三种水消毒剂（紫外线、次氯酸钠和臭氧）与银纳米颗粒 (AgNPs) 的溶解、聚集和反应动力学。通过使用紫外-可见分光光度法、透射电子显微镜和电感耦合等离子体发射光谱仪测量了 AgNPs 的物理化学变化。结果表明，当 AgNPs 与消毒剂接触时，氧化溶解是主要反应。此外，反应动力学研究表明，AgNPs 与消毒剂的反应速率受不同消毒剂以及不同 pH 值和硝酸钠及 HA 存在的显著影响。我们的研究表明了消毒剂对 AgNPs 的潜在影响，这将提高我们对 AgNPs 在水和废水处理厂消毒过程中命运的理解。
