Analysis of the effect of salt processing on microplastic residues in crushed and washed sea salt

被引：4

作者：

Li, Tianyao ^{[1
]}

Shi, Junqiang ^{[1
]}

Liu, Xuezhu ^{[1
]}

He, Menglan ^{[1
]}

Wang, Jianxin ^{[1
]}

Yan, Xiaojun ^{[1
]}

Fan, Yingping ^{[1
]}

机构：

[1] Zhejiang Ocean Univ, Marine Sci & Technol Coll, Marine Microbial Ecol & Applicat Lab, Zhoushan, Peoples R China

来源：

JOURNAL OF SEA RESEARCH | 2023年 / 194卷

关键词：

Crushed and washed; LDIR; Microplastics; Salt processing; Sea salt; TABLE SALTS; POLLUTION;

D O I：

10.1016/j.seares.2023.102405

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

This study focused on issues related to sea salt processing caused by marine microplastic pollution and investigated the effect of crushed and washed sea salt (CWSS) processing on microplastics (MPs) residues for the first time. Thirteen MPs contaminants were identified in the crude salts derived from seawater crystallization, with relative abundance of 256 & PLUSMN; 26 particles/10 g detected. After CWSS processing there were a total of 6 & PLUSMN; 5-112 & PLUSMN; 30 particles/10 g abundance in the final product. The results confirmed that the CWSS process had a significant impact on the abundance distribution of MPs in sea salt (p-value = 0.00147 < 0.01), and CWSS processing removed between 56.25% and 97.66% of microplastic particles from the crude material. The most prominent MP contaminants in both crude salt and commercial salt were PA (polyamide) and PU (polyurethane). It was found that PP (polypropylene) was mainly introduced during CWSS processing, in particular when packaging the salt. In addition, There was no significant difference for CWSS processing in the MPs removal between 0 and 140 & mu;m (p-value = 0.098 > 0.05).

引用

页数：8

共 27 条

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