The changing pattern of bioaerosol characteristics, source and risk under diversity brush aerator speed
文献类型：期刊论文
| 作者 | Li, Yan ; Yang, Liying; Song, Huiling; Ba, Yue; Li, Lin; Hong, Qing; Wang, Yanjie
|
| 刊名 | ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
 |
| 出版日期 | 2022-05-01 |
| 卷号 | 236期号:0页码:113478 |
| 关键词 | WATER TREATMENT-PLANT SIZE DISTRIBUTION BACTERIA EXPOSURE SURVIVAL EMISSION LUNGS FUNGI |
| ISSN号 | 0147-6513 |
| 英文摘要 | Bioaerosols containing pathogens released from wastewater treatment plants (WWTP) may pose potential health risks to workers on-site and residents downwind. In this study, sampling points were set up in the wastewater treatment facility to investigate the generation pattern of bioaerosols in the aeration tank section. High-throughput sequencing was utilized to assay the intestinal bacteria population, while the health risks associated with airborne bacteria were estimated based on average daily dose rates. The contribution of wastewater to bioaerosols was evaluated using the traceability analysis. As the rotational speed increased from 200 rpm to 800 rpm, the concentration of culturable bacteria increased from 397 CFU/m(3) to 1611 CFU/m(3), the proportion of bacteria attached to particles with an aerodynamic diameter larger than 4.7 um increased from 30.41% to 48.44%, and the Shannon index of air samples increased from 1.032485 to 1.282065. Microbial composition, sources, and health risks of bioaerosols also changed as the rotational speed increased. The results showed that the predominant bacteria in the air at 200 rpm were Bacillus (78.78%), Paenibacillus (11.77%) and Lysinibacillus (1.40%). When the rotating speed reached 800 rpm, the dominant bacteria became Bacillus (55.50%), Acinetobacter (31.01%), and Paenarthrobacter (13.17%). The contribution of the wastewater to bioaerosols increased from 46.49% to 65.10%, in which surface water was the main source of bioaerosols (34.64% on average). Although the contribution of bottom water was lower than that of surface water, its contribution increased more, from 15.36% to 29.31%. The health risk of bioaerosols was 1.28 x 10(-2) on average, which increased with the increase of rotational speed. At the same exposure concentration, children (2.31 x 10(-2)) have a higher exposure risk than adults (7.67 x 10(-3)). This study is aimed at exploring the variation law of bioaerosols discharged from WWTP with oxidation ditch process and providing preliminary data for reducing its risk. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47736]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 通讯作者 | Wang, Yanjie |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 2.Zhengzhou Univ, Zhengzhou 450001, Henan, Peoples R China 3.Zhengzhou Univ, Coll Publ Hlth, Zhengzhou 450001, Henan, Peoples R China 4.Zhengzhou Univ, Affiliated Hosp 1, Zhengzhou 450001, Henan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Yan,Yang, Liying,Song, Huiling,et al. The changing pattern of bioaerosol characteristics, source and risk under diversity brush aerator speed[J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,2022,236(0):113478. |
| APA | Li, Yan.,Yang, Liying.,Song, Huiling.,Ba, Yue.,Li, Lin.,...&Wang, Yanjie.(2022).The changing pattern of bioaerosol characteristics, source and risk under diversity brush aerator speed.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,236(0),113478. |
| MLA | Li, Yan,et al."The changing pattern of bioaerosol characteristics, source and risk under diversity brush aerator speed".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 236.0(2022):113478. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。