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Cheng H, Feng Y, Duan Z, Duan X, Zhao S, Wang Y, Gong Z, Wang L. Toxicities of microplastic fibers and granules on the development of zebrafish embryos and their combined effects with cadmium. Chemosphere 2021; 269:128677. [PMID: 33657748 DOI: 10.1016/j.chemosphere.2020.128677] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 10/09/2020] [Accepted: 10/16/2020] [Indexed: 06/12/2023]
Abstract
Toxicity of microplastics (MPs) in granular form to aquatic animals has been frequently tested, whereas the effects of fibrous MPs remain further explored. In this study, the effects of polyethylene terephthalate granular particles (p-PET, approximately 150 μm in diameter) and fibers (f-PET, approximately 3-5 mm in length and 20 μm in diameter) on the development of zebrafish embryos and their joint effects with cadmium (Cd) were compared. p-PET and f-PET accelerated the velocities of blood flow and heart rate and inhibited hatching in zebrafish embryos because of their barrier effects on the channels in the embryonic chorion and enhanced the mechanical strength of the chorion. The Cd content in the chorion increased by p-PET due to the adsorption of p-PET on the chorion. By contrast, more f-PET dissociated in culture medium and resulted in low Cd content in the chorion. Given that chorion can effectively block p-PET and f-PET, the Cd accumulation in eggs significantly decreased (p < 0.05) under p-PET/f-PET and Cd combined treatment because of the reduction in the bioavailability of Cd. Therefore, p-PET and f-PET decreased the toxicities of Cd on all the target endpoints in this study, and the detoxification effect of f-PET at 72 hpf was more significant than that of p-PET. These results suggest that the toxicity induced by MPs might be form-related.
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Affiliation(s)
- Haodong Cheng
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Yifan Feng
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Zhenghua Duan
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, 300384, China; Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria / Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China.
| | - Xinyue Duan
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Shuang Zhao
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Yudi Wang
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Zhiyuan Gong
- Department of Biological Sciences, National University of Singapore, Singapore, 117543, Singapore
| | - Lei Wang
- Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria / Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China
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