Song Yongye, Zhang Jianfen, Shen Xiuhua, Yang Lina, Jia Yong, Song Fangfang, Huang Yue, Han Bingyue, Zhou Shuyi, Zhang Na, Ma Guansheng
Department of Nutrition and Food Hygiene, School of Public Health, Peking University, 38 Xue Yuan Road, Haidian District, Beijing, 100191, China.
Department of Nutrition and Food Hygiene, School of Public Health, Peking University, 38 Xue Yuan Road, Haidian District, Beijing, 100191, China; Laboratory of Toxicological Research and Risk Assessment for Food Safety, Peking University, 38 Xue Yuan Road, Haidian District, Beijing, 100191, China.
Environ Pollut. 2025 Jan 1;364(Pt 2):125168. doi: 10.1016/j.envpol.2024.125168. Epub 2024 Nov 22.
The mass concentration of microplastics in stools and influencing factors remain unclear. The aim was to investigate the types and mass concentrations of microplastics in the stools of young college students and to explore potential influencing factors. Twenty-six participants were recruited from colleges in each city using stratified simple sampling, including Changsha, Shanghai, and Changchun. Participants' dietary and fluid intake behavior was recorded using the 3-day 24-h dietary questionnaire and the 7-day 24-h fluid intake record, respectively. Lifestyle factor information related to microplastic exposure was collected through a microplastic exposure questionnaire. Stools were collected and detected using pyrolysis gas chromatography-mass spectrometry (Py-GCMS) method. Eventually, 78 participants completed the study. The detection rate of microplastics, including polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), polypropylene (PP) and polyethylene terephthalate (PET), in stools was 98.7%, with a total mass concentration of 54.7 (10.1-102.7) μg/g. There were differences in the total mass concentrations of microplastics in the stools of participants in three cities, namely Changsha, Shanghai, and Changchun, which decreased sequentially (χ = 47.819, P < 0.05). Participants with a relatively high frequency of takeaway food consumption had higher total mass concentrations of microplastics mass concentrations in stools (χ = 7.390, P < 0.05). Participants with a relatively high frequency of consuming reheated food had a greater mass concentration of PET microplastics (χ = 6.117, P < 0.05). The total mass concentration of microplastics, as well as the mass concentrations of PE, PVC, PP, and PA66, in the bottled water intake group were greater than those in the nonintake group (all P < 0.05). Overall, the total mass concentration of microplastics in stools was related to residential city, consumption of reheated food, and bottled water intake (all P < 0.05). Young college students generally experience microplastic exposure, with the main types being PE, PVC, PS, PP, PET, and PA66. Living location, reheated food consumption, and bottled water intake were factors influencing microplastic exposure.
粪便中微塑料的质量浓度及其影响因素尚不清楚。本研究旨在调查青年大学生粪便中微塑料的类型和质量浓度，并探索潜在的影响因素。采用分层简单抽样方法，从长沙、上海和长春等城市的高校招募了26名参与者。分别使用3天24小时饮食问卷和7天24小时液体摄入记录来记录参与者的饮食和液体摄入行为。通过微塑料暴露问卷收集与微塑料暴露相关的生活方式因素信息。采用热解气相色谱-质谱联用（Py-GCMS）方法对粪便进行收集和检测。最终，78名参与者完成了研究。粪便中微塑料的检出率为98.7%，包括聚乙烯（PE）、聚氯乙烯（PVC）、聚苯乙烯（PS）、聚丙烯（PP）和聚对苯二甲酸乙二酯（PET），总质量浓度为54.7（10.1 - 102.7）μg/g。长沙、上海和长春三个城市参与者粪便中微塑料的总质量浓度存在差异，呈依次降低趋势（χ = 47.819，P < 0.05）。外卖食品消费频率相对较高的参与者粪便中微塑料的总质量浓度较高（χ = 7.390，P < 0.05）。食用反复加热食物频率相对较高的参与者，其PET微塑料的质量浓度更高（χ = 6.117，P < 0.05）。饮用瓶装水组粪便中微塑料的总质量浓度以及PE、PVC、PP和PA66的质量浓度均高于未饮用瓶装水组（所有P < 0.05）。总体而言，粪便中微塑料的总质量浓度与居住城市、反复加热食物的消费以及瓶装水的饮用有关（所有P < 0.05）。青年大学生普遍存在微塑料暴露情况，主要类型为PE、PVC、PS、PP、PET和PA66。居住地点、反复加热食物的消费和瓶装水的饮用是影响微塑料暴露的因素。
