The presence of microplastics in commercial salts from different countries.
The presence of microplastics in commercial salts from different countries.
复制标题
DOI：
10.1038/srep46173
复制
发表时间：
2017-04-06
影响因子：
4.6
通讯作者：
Salamatinia B
中科院分区：
文献类型：
--
作者：
Karami A;Golieskardi A;Keong Choo C;Larat V;Galloway TS;Salamatinia B
微塑料（MP）在盐水中的存在已经得到了比较充分的研究，但对于它们在地球仪上被人类广泛消费的大多数商业盐中的存在却一无所知。在这里，我们从来自8个不同国家的17种盐品牌中提取了大于149 μm的MP样颗粒，然后使用显微拉曼光谱法鉴定了它们的聚合物组成。一个品牌中没有微塑料，而其他品牌中含有1至10 MP/Kg的盐。在提取的72个颗粒中，41.6%是塑料聚合物，23.6%是色素，5.50%是无定形碳，29.1%仍未确定。粒度（平均值± SD）为515 ± 171 μm。最常见的塑料聚合物是聚丙烯（40.0%）和聚乙烯（33.3%）。MP的主要形态为碎片（63.8%），其次为丝状（25.6%）和膜状（10.6%）。根据我们的研究结果，从盐中摄入的人为颗粒物水平较低（每人每年最多37个颗粒物），对健康的影响可以忽略不计。然而，为了更好地了解与盐消费相关的健康风险，需要进一步开发提取协议，以分离小于149 μm的人为颗粒。
The occurrence of microplastics (MPs) in saltwater bodies is relatively well studied, but nothing is known about their presence in most of the commercial salts that are widely consumed by humans across the globe. Here, we extracted MP-like particles larger than 149 μm from 17 salt brands originating from 8 different countries followed by the identification of their polymer composition using micro-Raman spectroscopy. Microplastics were absent in one brand while others contained between 1 to 10 MPs/Kg of salt. Out of the 72 extracted particles, 41.6% were plastic polymers, 23.6% were pigments, 5.50% were amorphous carbon, and 29.1% remained unidentified. The particle size (mean ± SD) was 515 ± 171 μm. The most common plastic polymers were polypropylene (40.0%) and polyethylene (33.3%). Fragments were the primary form of MPs (63.8%) followed by filaments (25.6%) and films (10.6%). According to our results, the low level of anthropogenic particles intake from the salts (maximum 37 particles per individual per annum) warrants negligible health impacts. However, to better understand the health risks associated with salt consumption, further development in extraction protocols are needed to isolate anthropogenic particles smaller than 149 μm.