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Title: Extraction of biodegradable microplastics from tissues of aquatic organisms
Authors: Yu, Wenyi
Chen, Jiaqi
Zhang, Shenghu
Zhao, Yanping
Fang, Mingliang
Deng, Yongfeng
Zhang, Yan
Keywords: Engineering::Environmental engineering
Issue Date: 2022
Source: Yu, W., Chen, J., Zhang, S., Zhao, Y., Fang, M., Deng, Y. & Zhang, Y. (2022). Extraction of biodegradable microplastics from tissues of aquatic organisms. Science of the Total Environment, 838(Part 4), 156396-.
Journal: Science of the Total Environment 
Abstract: Biodegradable plastics (BPs) have been given high hopes to substitute conventional plastics, but their biodegradation requires strict conditions. BPs can accumulate for a long time in the environment and even derive biodegradable microplastics (BMPs), thus threatening wildlife and ecosystems. However, no efficient method is available for extracting BMPs from organisms' tissues. This study used multi-criteria decision-making (MCDM) methods to comprehensively evaluate and optimize extraction protocols of five BMPs from economic aquatic species. Digestion time, digestion efficiency, mass loss, cost, polymer integrity and size change were selected as evaluating indictors. According to the screening results of MCDM methods, Pepsin+H2O2 was selected as the optimal digestion method of BMPs because of its highest comprehensive score, which has high digestion efficiency (99.56%) and minimum plastic damage. Compared with olive oil, NaI is more suitable for separating BMPs from the digested residues. Furthermore, the combination of Pepsin+H2O2 digestion and NaI density separation was used to extract all five kinds of BMPs from the bivalve, crab, squid, and crayfish tissues, and all the recovery rates exceeded 80%. These results suggest that the optimal protocol is practicable to extract various BMPs from various aquatic organisms.
ISSN: 0048-9697
DOI: 10.1016/j.scitotenv.2022.156396
Schools: School of Civil and Environmental Engineering 
Rights: © 2022 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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