Abstract：
A significant concern in our society is the potential impact on both health and the environment of air pollutants released during the incineration of waste. Therefore, it is crucial to conduct thorough control and monitoring measures. In this context, the objective of this research was to study the evolution of particulate matter (PM2.5) and associated trace elements during the period before and after the installation of an Energy Recovery Plant (ERP). For that, a descriptive and temporal analysis of PM2.5 concentration and composition were performed on two similar areas (impact/control) using the Before-After/Control-Impact (BACI) design and two periods (before from January 01, 2018 to February 06, 2020 and after from December 10, 2020 to September 30, 2022). Results showed a decrease in the levels of PM2.5 and associated trace elements is observed in the impact zone (IZ) and in the control zone (CZ) throughout the study period. In the case of PM2.5, the most notable decrease occurred in the period of the start-up of the ERP, a period that coincides with the confinement and restrictions of COVID, with a subsequent increase in both zones, without reaching the levels observed in the period prior to the start-up of the ERP. Selenium is the only trace element that increases significantly in the IZ. In conclusion, a decrease is observed for all pollutants except selenium in both zones, although less pronounced in the IZ. Since selenium already showed an upward trend in the phase prior to the start of the ERP, it is necessary to investigate its evolution and find out the possible cause.
摘要：
我们社会的一个重要问题是废物焚烧过程中释放的空气污染物对健康和环境的潜在影响，因此，进行彻底的控制和监测措施至关重要。在这种情况下，这项研究的目的是研究在安装能源回收工厂（ERP）前后期间颗粒物（PM2.5）和相关微量元素的演变。为此，使用前-后/控制-影响(BACI)设计和两个时期(2018年1月1日至2020年6月2日之前和2020年10月12日至2022年9月30日之后),对两个相似区域(影响/控制)的PM2.5浓度和组成进行了描述性和时间分析.结果表明，在整个研究期间，在影响区（IZ）和控制区（CZ）观察到PM2.5和相关微量元素的水平下降。在PM2.5的情况下，最显着的下降发生在ERP启动期间，一个与COVID的禁闭和限制相吻合的时期，随着这两个区域的增加，没有达到ERP启动之前的水平。硒是唯一在IZ中显著增加的微量元素。总之,在这两个区域，除硒外，所有污染物都有下降，虽然在IZ不太明显。由于硒在ERP开始之前的阶段已经显示出上升趋势，有必要调查其演变并找出可能的原因。
