Liu Liping, Zhang Xue, Jia Puqi, He Shanshan, Dai Han, Deng Shihai, Han Jie
School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China; Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China.
Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China; College of Science and Technology, Hebei Agricultural University, Huanghua, 061100, People's Republic of China.
Environ Pollut. 2023 Apr 15;323:121197. doi: 10.1016/j.envpol.2023.121197. Epub 2023 Feb 1.
The occurrence of microplastic contaminants in food intended for human consumption has been widely explored. Yet, investigations on plastic and other particle debris in baby food packaging remain scarce to date. Our study shows the release of abundant micro-sized and submicron-sized particles, floccules (<300 μm), and fragments (1-50 μm) during the simulated use of commercially available single-use breastmilk storage bags. Six best-selling products of breastmilk storage bags were selected in our study. Most of the particles released from breastmilk storage bags that were identified as plastics were found to be polyethylene (PE), polyethylene terephthalate (PET), and nylon-6 using micro-Raman spectroscopy. The weight of the particles released from three randomly selected bags of the same product type was determined to be in the range of 0.22 and 0.47 mg. Submicron-sized particles (<0.8 μm) with irregular spherical or oval shapes were present. Microplastics and other particles ingested by infants from the use of breastmilk storage bags were estimated to be 0.61-0.89 mg/day based on the average daily breastmilk intake by infants. This study provides new insights into the exposure to microplastics and other particle debris in commonly used infant products.
针对供人类食用的食品中微塑料污染物的出现情况，人们已进行了广泛研究。然而，迄今为止，关于婴儿食品包装中的塑料及其他颗粒碎片的调查仍然很少。我们的研究表明，在模拟使用市售一次性母乳储存袋的过程中，会释放出大量的微米级和亚微米级颗粒、絮状物（<300μm）以及碎片（1 - 50μm）。我们的研究选取了六种最畅销的母乳储存袋产品。使用显微拉曼光谱法发现，从母乳储存袋中释放出的大部分被鉴定为塑料的颗粒是聚乙烯（PE）、聚对苯二甲酸乙二酯（PET）和尼龙 - 6。从同一产品类型中随机选取的三个袋子释放出的颗粒重量在0.22至0.47毫克范围内。存在不规则球形或椭圆形的亚微米级颗粒（<0.8μm）。根据婴儿的平均每日母乳摄入量估算，婴儿因使用母乳储存袋而摄入的微塑料和其他颗粒为0.61 - 0.89毫克/天。本研究为常用婴儿产品中微塑料和其他颗粒碎片的暴露情况提供了新的见解。
