Assessment of the distribution and ecological risks of heavy metals in coastal sediments in Vietnam's Mong Cai area.

Autor: Loan BTT; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Ha Noi City, Vietnam., Nhon DH; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Ha Noi City, Vietnam. nhondh@imer.vast.vn.; Institute of Marine Environment and Resources, Vietnam Academy of Science and Technology, 246 Da Nang Street, Hai Phong City, Vietnam. nhondh@imer.vast.vn., Ve ND; Institute of Marine Environment and Resources, Vietnam Academy of Science and Technology, 246 Da Nang Street, Hai Phong City, Vietnam., Luu NTM; Institute of Marine Environment and Resources, Vietnam Academy of Science and Technology, 246 Da Nang Street, Hai Phong City, Vietnam., Sieu LN; Dalat Nuclear Research Institute, Vietnam Atomic Energy Commission, 1 Nguyen Tu Luc Street Lam Dong Province, Da Lat City, Vietnam., Hue NT; Institute of Environmental Sciences and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Ha Noi City, Vietnam., Van Vuong B; Institute of Marine Environment and Resources, Vietnam Academy of Science and Technology, 246 Da Nang Street, Hai Phong City, Vietnam., Nghi DT; Institute of Marine Environment and Resources, Vietnam Academy of Science and Technology, 246 Da Nang Street, Hai Phong City, Vietnam., Van Nam L; Institute of Marine Environment and Resources, Vietnam Academy of Science and Technology, 246 Da Nang Street, Hai Phong City, Vietnam., Dung PT; Institute of Environment, Vietnam Maritime University, 484 Lach Tray Street, Hai Phong City, Vietnam., Anh VT; Institute for Nuclear Science and Technology, Vietnam Atomic Energy Commission, 197 Hoang Quoc Viet Street, Ha Noi City, Vietnam., Anh HL; Institute for Nuclear Science and Technology, Vietnam Atomic Energy Commission, 197 Hoang Quoc Viet Street, Ha Noi City, Vietnam., Dung NTK; University of Management and Technology of Hai Phong, 36 Dan Lap Street, Hai Phong City, Vietnam., Ha NM; Hanoi University of Science, Vietnam National University, 334 Nguyen Trai Street, Ha Noi City, Vietnam., Van Chien N; Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Ha Noi City, Vietnam., Lan NTH; Dalat Nuclear Research Institute, Vietnam Atomic Energy Commission, 1 Nguyen Tu Luc Street Lam Dong Province, Da Lat City, Vietnam.
Jazyk: angličtina
Zdroj: Environmental monitoring and assessment [Environ Monit Assess] 2022 Nov 29; Vol. 195 (1), pp. 164. Date of Electronic Publication: 2022 Nov 29.
DOI: 10.1007/s10661-022-10779-1
Abstrakt: Coastal sediments in the Mong Cai area were collected and analyzed for grain size, heavy metals, total organic carbon, and isotopes ( 210 Pb, 226 Ra, δ 15 N, δ 13 C) to assess sediment quality. The most common sediments were fine sand in surface sediment, very fine sand in core C1, and very coarse and coarse silt in core C2. The total organic carbon was highest in C2 next to the surface and lowest in C1, with content levels of 1.81%, 0.40%, and 0.31%, respectively. The chronology in C1 was 1877-2019 (142 years, 0-5 0 cm), with an average sedimentation rate of 0.71 cm/year. In C2, the chronology was 1944-2019 (75 years, 0-14 cm), with an average sedimentation rate of 0.27 cm/year. These δ 13 C and δ 15 N in the sediment reflect the source of the organic matter mix from the marine and terrigenous sediments. All studied heavy metals were lower than the ISQGs, with the exception of As in C1 and C2, which were higher. C1 showed a decline in As over time, while C2 As levels increased between 1996 and 2019. In terms of heavy metal pollution indexes, the geoaccumulation index (Igeo) showed that C1 and C2 were unpolluted to moderately polluted with As, with Li and Pb in C2; the enrichment factor (EF) was moderately enriched with As; the contamination factor (CF) was moderately contaminated (Pb, Cd, Fe, Mo, and Li) in C2 and C1 (Cd, As, Li) and considerably contaminated (As) in C2. The risk factor (ER) of As showed a moderate potential ecological risk in C2. The degree of contamination (CD) ranged from moderate to considerable (C1, C2), and the ecological risk (RI) was low. Although CD ranged from moderate (C1) to considerable (C2), most contamination was concentrated at the bottom of the cores. RI was low. The Mong Cai sediment quality does not currently affect the coastal area's ecosystem and fauna.
(© 2022. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
Databáze: MEDLINE
Externí odkaz: