Xu Yan, Li Haiyan, Zhang Xiaoran, Bai Xiaojuan, Wu Liyuan, Tan Chaohong, Zhang Ziyang
Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control, Engineering and Architecture, Beijing University of Civil, 1 Zhanlanguan Road, Xicheng District, Beijing, 100044, China.
Beijing Advanced Innovation Center for Future Urban Design, Beijing, 100044, China.
Environ Sci Pollut Res Int. 2023 Apr;30(16):46940-46949. doi: 10.1007/s11356-023-25330-z. Epub 2023 Feb 3.
Particulate matter (PM), as an important carrier of carrying and transporting runoff pollutants, can significantly affect the behavior and removal efficiency of pollutants in bioretention facilities. In order to control the pollution caused by naphthalene in bioretention facilities, the removal efficiency and migration characteristics of naphthalene were systematically investigated under the influences of PM. The results showed that the removal efficiency of naphthalene was 74 ~ 97% in bioretention facilities under the influences of PM. With the higher concentration, the lower rainfall return period, and the longer antecedent drying period, the removal efficiency of naphthalene in each medium layer were higher. Furthermore, the PM could increase the naphthalene adsorption capacity onto medium in the first 10 cm depth, which showed more than 80% removal efficiency and lower mobility of naphthalene. The removal efficiency of naphthalene was significantly higher (90 ~ 97%), when the particle size and concentration of PM were 0 ~ 45 μm and 500 mg/L, respectively. This study investigated the important role of PM for naphthalene removal in bioretention facilities, and provided effective guidelines for runoff pollution control, design of stormwater facilities, and assessment risk of naphthalene.
颗粒物（PM）作为携带和运输径流污染物的重要载体，会显著影响生物滞留设施中污染物的行为和去除效率。为了控制生物滞留设施中萘造成的污染，系统研究了在颗粒物影响下萘的去除效率和迁移特性。结果表明，在颗粒物影响下，生物滞留设施中萘的去除效率为74%至97%。浓度越高、降雨重现期越短、前期干燥期越长，各介质层中萘的去除效率越高。此外，颗粒物可提高萘在0至10厘米深度介质上的吸附能力，萘的去除效率超过80%，迁移性较低。当颗粒物粒径和浓度分别为0至45微米和500毫克/升时，萘的去除效率显著更高（90%至97%）。本研究调查了颗粒物在生物滞留设施中对萘去除的重要作用，为径流污染控制、雨水设施设计和萘的风险评估提供了有效指导。
