Cui Jiawen, Chen Chen, Gan Quan, Wang Tongfei, Li Wei, Zeng Wen, Xu Xiaowen, Chen Gang, Wang Li, Lu Zhaogeng, Li Jiana, Jin Biao
College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China.
College of Bioscience and Biotechnology, Yangzhou University, Yangzhou 225009, China.
Sci Total Environ. 2022 Dec 15;852:158233. doi: 10.1016/j.scitotenv.2022.158233. Epub 2022 Aug 22.
Humans may be exposed to microplastics (MPs) through food, drink, and air. Although several studies have examined indoor environmental MPs, none have yet compared atmospheric MP and bacterial deposition characteristics among rooms in homes. We investigated indoor airborne MPs and bacteria in five room types (bedroom, dining room, living room, bathroom, and study) based on the duration of usage of each room. We identified synthetic polymers (23,889 MP particles of 21 types) and bacterial communities (383 genera belong to 24 phyla) collected through atmospheric deposition in various rooms of 20 homes. The abundance and composition of MPs are related to the duration of usage, human activities, goods, cleanliness, and the composition of occupants (family members) in households. In addition, the homes of elderly families (age 68-81 years) showed higher bacterial concentrations than those of young families (age 28-35 years), indicating that age markedly affects the structure of household microbiota. Furthermore, a significant correlation between MP concentration and bacterial community structure was observed. The abundances of polyamide (PA), polyurethane (PU), and polyethylene (PE) showed positive correlations with the relative abundances of major bacterial phyla. Taken together, our results suggest that various rooms in the home exhibit distinct MP abundances and bacterial structures that may be affected by age, cleanliness, and human activities.
人类可能通过食物、饮料和空气接触到微塑料（MPs）。尽管已有多项研究对室内环境中的微塑料进行了检测，但尚无研究比较家庭不同房间内大气微塑料和细菌的沉积特征。我们根据每个房间的使用时长，对五种房间类型（卧室、餐厅、客厅、浴室和书房）内的室内空气传播微塑料和细菌进行了调查。我们识别出了通过大气沉降在20个家庭的不同房间中收集到的合成聚合物（21种类型的23,889个微塑料颗粒）和细菌群落（属于24个门的383个属）。微塑料的丰度和组成与使用时长、人类活动、物品、清洁程度以及家庭中居住者（家庭成员）的组成有关。此外，老年家庭（年龄在68 - 81岁）的家中细菌浓度高于年轻家庭（年龄在28 - 35岁），这表明年龄对家庭微生物群结构有显著影响。此外，还观察到微塑料浓度与细菌群落结构之间存在显著相关性。聚酰胺（PA）、聚氨酯（PU）和聚乙烯（PE）的丰度与主要细菌门的相对丰度呈正相关。综上所述，我们的结果表明，家中不同房间呈现出不同的微塑料丰度和细菌结构，这些可能受到年龄、清洁程度和人类活动的影响。
