Occurrence and distribution of microplastics in peatland areas: A case study in Long An province of the Mekong Delta, Vietnam.

Autor: Nguyen MK; Ph.D. Program in Maritime Science and Technology, College of Maritime, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan; Faculty of Environment and Natural Resources, Nong Lam University of Ho Chi Minh City, Hamlet 6, Linh Trung Ward, Thu Duc Dist., Ho Chi Minh City 700000, Viet Nam; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan., Lin C; Ph.D. Program in Maritime Science and Technology, College of Maritime, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan. Electronic address: ctlin@nkust.edu.tw., Hung NTQ; Faculty of Environment and Natural Resources, Nong Lam University of Ho Chi Minh City, Hamlet 6, Linh Trung Ward, Thu Duc Dist., Ho Chi Minh City 700000, Viet Nam., Vo DN; Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN), Nguyen Tat Thanh University, Ho Chi Minh City 700000, Viet Nam., Nguyen KN; Department of Soil Science, College of Agriculture, Can Tho University, Can Tho City 270000, Viet Nam., Thuy BTP; Faculty of Basic Sciences, Van Lang University, Ho Chi Minh City 700000, Viet Nam., Hoang HG; Faculty of Applied Science-Health, Dong Nai Technology University, Bien Hoa, Dong Nai 810000, Viet Nam., Tran HT; Laboratory of Ecology and Environmental Management, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City 700000, Viet Nam; Faculty of Applied Technology, School of Engineering and Technology, Van Lang University, Ho Chi Minh City 700000, Viet Nam. Electronic address: tranhuutuan@vlu.edu.vn.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2022 Oct 20; Vol. 844, pp. 157066. Date of Electronic Publication: 2022 Jul 01.
DOI: 10.1016/j.scitotenv.2022.157066
Abstrakt: Vietnam is known as one of the high plastic consumption countries in Southeast Asia. This study initially determined characteristics of microplastics (MPs) including morphology, polymer type, and abundance at peatland areas in Mekong Delta in Vietnam. The MPs level was found with an average abundance of 192.3 ± 261.3 items kg -1 . In details, those values at Thanh Hoa, Duc Hue, and Tan Thanh were observed at 57.0 ± 110.4 items kg -1 , 7.0 ± 10.6 items kg -1 , and 513.0 ± 186.9 items kg -1 , respectively. The results indicated that MP particle contaminations in peatland sediments are significant among sampling sites (p < 0.001). Also, FT-IR analysis indicated that polyvinyl chloride is the primary polymer (46.2 %), followed by polyethylene (20.9 %), and polypropylene (9.2 %) in peatland samples and their composition varies in different regions significantly. The fragments (67.0 %) and films (24.6 %) were the most common shapes, followed by fibers (7.6 %) and foams (0.9 %). Small MPs with particle size (300-1000 μm) was the most abundant in sediment samples. Moreover, the most popular colors observed in peatland sediments were aqua (26.6 %), white (25.6 %), blue (25.4 %), and green (12.7 %). Our findings indicated that anthropogenic factors and environmental processes that caused the transformation/transportation and accumulation, leading to rising MP contaminant concerns in peatland areas in Mekong Delta in Vietnam, mainly in terms of the spatial distribution of MPs. In summary, this study provided an in-depth knowledge of microplastic pollution in peatland areas, which is crucial for the building sustainable development strategies in these areas.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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