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Jiang T, Mao Z, Qi Y, Wu Y, Zhang J. The effect of two different
UV
absorbers combined with antioxidants on
UV
resistance of
HDPE. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tiankai Jiang
- College of Materials Science and Engineering Nanjing Tech University Nanjing China
- Jiangsu Vocational Institute of Commerce Nanjing China
| | - Zepeng Mao
- College of Materials Science and Engineering Nanjing Tech University Nanjing China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing China
| | - Yanli Qi
- College of Materials Science and Engineering Nanjing Tech University Nanjing China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing China
| | - Yuchen Wu
- College of Materials Science and Engineering Nanjing Tech University Nanjing China
| | - Jun Zhang
- College of Materials Science and Engineering Nanjing Tech University Nanjing China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing China
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Liu X, Gharasoo M, Shi Y, Sigmund G, Hüffer T, Duan L, Wang Y, Ji R, Hofmann T, Chen W. Key Physicochemical Properties Dictating Gastrointestinal Bioaccessibility of Microplastics-Associated Organic Xenobiotics: Insights from a Deep Learning Approach. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:12051-12062. [PMID: 32931256 DOI: 10.1021/acs.est.0c02838] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A potential risk from human uptake of microplastics is the release of plastics-associated xenobiotics, but the key physicochemical properties of microplastics controlling this process are elusive. Here, we show that the gastrointestinal bioaccessibility, assessed using an in vitro digestive model, of two model xenobiotics (pyrene, at 391-624 mg/kg, and 4-nonylphenol, at 3054-8117 mg/kg) bound to 18 microplastics (including pristine polystyrene, polyvinyl chloride, polyethylene terephthalate, polypropylene, thermoplastic polyurethane, and polyethylene, and two artificially aged samples of each polymer) covered wide ranges: 16.1-77.4% and 26.4-83.8%, respectively. Sorption/desorption experiments conducted in simulated gastric fluid indicated that structural rigidity of polymers was an important factor controlling bioaccessibility of the nonpolar, nonionic pyrene, likely by inducing physical entrapment of pyrene in porous domains, whereas polarity of microplastics controlled bioaccessibility of 4-nonylphenol, by regulating polar interactions. The changes of bioaccessibility induced by microplastics aging corroborated the important roles of polymeric structures and surface polarity in dictating sorption affinity and degree of desorption hysteresis, and consequently, gastrointestinal bioaccessibility. Variance-based global sensitivity analysis using a deep learning neural network approach further revealed that micropore volume was the most important microplastics property controlling bioaccessibility of pyrene, whereas the O/C ratio played a key role in dictating the bioaccessibility of 4-nonylphenol in the gastric tract.
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Affiliation(s)
- Xinlei Liu
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300350, P. R. China
| | - Mehdi Gharasoo
- University of Waterloo, Department of Earth and Environmental Sciences, Ecohydrology, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Yu Shi
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300350, P. R. China
| | - Gabriel Sigmund
- Department of Environmental Geosciences, Research Platform Plastics in the Environment and Society (PLENTY), Centre for Microbiology and Environmental Systems Science, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | - Thorsten Hüffer
- Department of Environmental Geosciences, Research Platform Plastics in the Environment and Society (PLENTY), Centre for Microbiology and Environmental Systems Science, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | - Lin Duan
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300350, P. R. China
| | - Yongfeng Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, P. R. China
| | - Rong Ji
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, P. R. China
| | - Thilo Hofmann
- Department of Environmental Geosciences, Research Platform Plastics in the Environment and Society (PLENTY), Centre for Microbiology and Environmental Systems Science, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | - Wei Chen
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300350, P. R. China
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