State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China; National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing, 101408, China.
Environ Res. 2021 Apr;195:110798. doi: 10.1016/j.envres.2021.110798. Epub 2021 Jan 30.
Bioaerosols containing pathogens released from waste and wastewater treatment facilities pose potential health risks to workers on-site and residents downwind. In this study, sampling sites were set up at rural garbage stations (GS-1 and GS-2) and sewage treatment station (STS) to investigate the emission and diffusion characteristics of bioaerosols. High-throughput sequencing was utilized to assay the intestinal bacteria population, while the health risks associated with bioaerosols exposure were estimated based on average daily dose rates (DD). Traceability analysis was used to determine the percentages of intestinal bacteria from GS-1, GS-2 and STS. The recorded emission levels of bioaerosols in the air surrounding GS-1, GS-2, and STS were 5053, 6299, and 4795 CFU/m, containing 1599, 2244, and 2233 CFU/m of intestinal bacteria, respectively. Most of the bioaerosols were coarse particles with size larger than 4.7 μm. Methylobacterium, Rhizobium, Pseudomonas, Enterobacteriaceae, and Brucella presented in the air were originally in rural waste and wastewater. STS and GS-2 were potential sources of intestinal bacteria. With increasing distance from the sources, the concentration of bioaerosols decreased gradually. On-site workers and residents were predominantly affected by bioaerosols through inhalation. The exposure risks via inhalation and skin contact for children were much higher than that for adults. The purpose of this study was to provide preliminary data for bioaerosols control and their risks reduction released from rural sanitation facilities.
从废物和废水处理设施中释放出的含有病原体的生物气溶胶对现场工人和下风区居民构成潜在健康风险。在这项研究中，在农村垃圾站（GS-1 和 GS-2）和污水处理站（STS）设置了采样点，以调查生物气溶胶的排放和扩散特征。高通量测序用于检测肠道细菌种群，同时根据平均日剂量率（DD）估计与生物气溶胶暴露相关的健康风险。溯源分析用于确定来自 GS-1、GS-2 和 STS 的肠道细菌的百分比。记录的 GS-1、GS-2 和 STS 周围空气中生物气溶胶的排放水平分别为 5053、6299 和 4795 CFU/m，分别含有 1599、2244 和 2233 CFU/m 的肠道细菌。大多数生物气溶胶是大于 4.7μm 的粗颗粒。空气中存在的甲基杆菌、根瘤菌、假单胞菌、肠杆菌科和布鲁氏菌最初存在于农村废物和废水中。STS 和 GS-2 是肠道细菌的潜在来源。随着与源的距离增加，生物气溶胶的浓度逐渐降低。现场工人和居民主要通过吸入受到生物气溶胶的影响。儿童通过吸入和皮肤接触暴露的风险远高于成年人。本研究旨在为农村卫生设施释放的生物气溶胶控制及其风险降低提供初步数据。
