Anthropogenic particle abundance and characteristics in seawater and intertidal sediments of the Tonkin Bay Coast (North Vietnam).

Autor: Phuong NN; PhuTho College of Medicine and Pharmacy, 2201 Hung Vuong Boulevard, Viet Tri City, Phu Tho Province, 290000, Vietnam. pnnam87@gmail.com., Duong TT; Institute of Science and Technology for Energy and Environment, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam. duongthuy0712@gmail.com., Pham QT; PhuTho College of Medicine and Pharmacy, 2201 Hung Vuong Boulevard, Viet Tri City, Phu Tho Province, 290000, Vietnam., Ngo TXT; PhuTho College of Medicine and Pharmacy, 2201 Hung Vuong Boulevard, Viet Tri City, Phu Tho Province, 290000, Vietnam., Nguyen TMD; PhuTho College of Medicine and Pharmacy, 2201 Hung Vuong Boulevard, Viet Tri City, Phu Tho Province, 290000, Vietnam., Phuong NA; Vietnam National Lung Hospital, 463 Hoang Hoa Tham, Ba Dinh, Hanoi, Vietnam., Le TPQ; Institute of Natural Product Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam., Duong TN; Institute of Marine Environment and Resources, 246 Da Nang Street, Ngo Quyen, Hai Phong, Vietnam., Dhivert E; EA 6293 GéoHydrosystèmes Continentaux, University of Tours, F-37200, Tours, France., Zalouk-Vergnoux A; Institut Des Substances Et Organismes de La Mer, ISOMer, Nantes Université, UR 2160, F-44000, Nantes, France., Poirier L; Institut Des Substances Et Organismes de La Mer, ISOMer, Nantes Université, UR 2160, F-44000, Nantes, France., Gasperi J; GERS-LEE Université Gustave Eiffel, IFSTTAR, 44344, Bouguenais, France.
Jazyk: angličtina
Zdroj: Environmental monitoring and assessment [Environ Monit Assess] 2024 May 06; Vol. 196 (6), pp. 514. Date of Electronic Publication: 2024 May 06.
DOI: 10.1007/s10661-024-12674-3
Abstrakt: Microplastics (MPs, plastic items from 1 µm to 5 mm in size) are present in all environmental compartments. The evaluation of their concentration, fate, and spatial distribution is still a challenge for the scientific community. This concern is just debuting in developing countries, (i.e., Asia, South America, and Africa). This study deals with the MP contamination in the abiotic marine compartments of Northern Vietnam: seawater and intertidal sediments. Four sites located in the intertidal zone or near the coastline in Tonkin Bay, Vietnam were studied. A total of 16 samples (eight for each compartment) were collected in July 2020 (rainy season) and January 2021 (dry season). Anthropogenic particles (total observed fibers and fragments) were found at levels ranging from 3 to 303 particles/m 3 in seawater and from 63 to 955 particles/kg dry weight in sediments. Most of these were fibers less than 300-µm long. Higher levels of seawater at the Nam Dinh site were found in the rainy season compared to the dry one. As the river flow was estimated six times higher during the rainy season than during the dry season, these results suggest the river discharge is a potential source of contamination for the coastal zone. The temporal variability was lower for the sediments than for the seawater, suggesting the long-term integration of the anthropogenic particles in this compartment. A small portion of sorted particles were analyzed by µFTIR (8.35%), and this sub-sample was only composed of fragments. Still, fragments were mostly composed of polypropylene (PP, 82%), polyethylene (PE, 9%), and polystyrene (PS, 9%). The fragment size was similar in the two studied compartments, but it was dependent on polymer types since PS fragments (140 ± 17 µm) were smaller than those made of PE (622 ± 123 µm) and PP (869 ± 905 µm). Future works should investigate the smallest fraction of MP (even nanoplastics) as well as find solutions in order to mitigate MP contamination in the marine environment.
(© 2024. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
Databáze: MEDLINE
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