{"title":"Ingested microplastics: Do humans eat one credit card per week?","authors":"Martin Pletz","doi":"10.1016/j.hazl.2022.100071","DOIUrl":null,"url":null,"abstract":"<div><p>Ingested Microplastic (MP) particles can harm the human body. Estimations of the total mass of ingested MP particles correspond to 50 plastic bags per year (<span>Bai et al., 2022</span>), one credit card per week (<span>Gruber et al., 2022</span>), or a median value of 4.1 μg/week for adults (<span>Mohamed Nor et al., 2021</span>). The first two estimations are based on an analysis (<span>Senathirajah et al., 2021</span>) that predicts a total ingested mass of MP particles <em>m</em><sub>i,MP</sub> of 0.1–5 g/week. This work revisits and evaluates this calculation and compares its results and methods to <span>Mohamed Nor et al. (2021)</span>. Senathirajah combines data of averaged MP particle masses <span><math><msub><mrow><mover><mrow><mi>m</mi></mrow><mrow><mo>¯</mo></mrow></mover></mrow><mrow><mi>MP</mi></mrow></msub></math></span> from papers that reported MP particle sizes and MP particle counts <em>n</em><sub>MP</sub> in shellfish, salt, beer, and water based on other papers that detected MP particles. Combined with the estimated weekly consumption of those consumables, they compute <em>m</em><sub>i,MP</sub>. This work raises some serious issues of Senathirajah in the way they combine data and they obtained particle sizes. It concludes that Senathirajah overestimates <em>m</em><sub>i,MP</sub> by several orders of magnitude and that <em>m</em><sub>i,MP</sub> can be considered as a rather irrelevant factor for the toxic effects of MP particles on the human body.</p></div>","PeriodicalId":93463,"journal":{"name":"Journal of hazardous materials letters","volume":"3 ","pages":"Article 100071"},"PeriodicalIF":6.6000,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666911022000247/pdfft?md5=02aeea1849e1b8ce78b878fe49cb035a&pid=1-s2.0-S2666911022000247-main.pdf","citationCount":"7","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of hazardous materials letters","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666911022000247","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 7
Abstract
Ingested Microplastic (MP) particles can harm the human body. Estimations of the total mass of ingested MP particles correspond to 50 plastic bags per year (Bai et al., 2022), one credit card per week (Gruber et al., 2022), or a median value of 4.1 μg/week for adults (Mohamed Nor et al., 2021). The first two estimations are based on an analysis (Senathirajah et al., 2021) that predicts a total ingested mass of MP particles mi,MP of 0.1–5 g/week. This work revisits and evaluates this calculation and compares its results and methods to Mohamed Nor et al. (2021). Senathirajah combines data of averaged MP particle masses from papers that reported MP particle sizes and MP particle counts nMP in shellfish, salt, beer, and water based on other papers that detected MP particles. Combined with the estimated weekly consumption of those consumables, they compute mi,MP. This work raises some serious issues of Senathirajah in the way they combine data and they obtained particle sizes. It concludes that Senathirajah overestimates mi,MP by several orders of magnitude and that mi,MP can be considered as a rather irrelevant factor for the toxic effects of MP particles on the human body.