TY - JOUR
T1 - Environmental processes and fate of PAHs at a shallow and enclosed bay
T2 - West Nanao Bay, Noto Peninsula, Japan
AU - Mundo, Rodrigo
AU - Matsunaka, Tetsuya
AU - Iwai, Hisanori
AU - Ochiai, Shinya
AU - Nagao, Seiya
N1 - Funding Information:
This work was supported by Sumitomo's Grant for Environmental Research Projects from the Sumitomo Foundation , Kurita Water and Environment Foundation’s Grant for promotion of research (No. 21B053 ) and Kanazawa University SAKIGAKE PROJECT.
Publisher Copyright:
© 2022
PY - 2022/11
Y1 - 2022/11
N2 - From August 2019 to August 2020, particulate and dissolved polycyclic aromatic hydrocarbons concentrations (PAHs) were analyzed in the water body of West Nanao Bay, Japan, to determinate their levels, environmental pathways, and ecological risks at this remote but shallow and semi-enclosed bay. The 14 targeted PAHs were analyzed by high performance liquid chromatography-fluorescence detector. Even when water column stratifies, the summatory of 14 targeted dissolved PAHs did not follow significantly change with depth. Results agreed with our previous findings in the surface distribution at the bay and can be attributed to long retention time of the water mass of the semi-enclosed bay. Suspended solids start precipitating according to their size; with biggest particles rapidly settling in the proximities of river mouths. Partition coefficients (Kp) varied from 103 to 107, according to molecular weights. In general, highest Kp were found in the nepheloid layer. The risk quotients, RQ∑14 PAHs (NCs) (1.04–174.08), indicated that PAHs represented a very low to low environmental risks.
AB - From August 2019 to August 2020, particulate and dissolved polycyclic aromatic hydrocarbons concentrations (PAHs) were analyzed in the water body of West Nanao Bay, Japan, to determinate their levels, environmental pathways, and ecological risks at this remote but shallow and semi-enclosed bay. The 14 targeted PAHs were analyzed by high performance liquid chromatography-fluorescence detector. Even when water column stratifies, the summatory of 14 targeted dissolved PAHs did not follow significantly change with depth. Results agreed with our previous findings in the surface distribution at the bay and can be attributed to long retention time of the water mass of the semi-enclosed bay. Suspended solids start precipitating according to their size; with biggest particles rapidly settling in the proximities of river mouths. Partition coefficients (Kp) varied from 103 to 107, according to molecular weights. In general, highest Kp were found in the nepheloid layer. The risk quotients, RQ∑14 PAHs (NCs) (1.04–174.08), indicated that PAHs represented a very low to low environmental risks.
KW - Ecological risk assessment
KW - Environmental organic pollutants
KW - Polycyclic aromatic hydrocarbons
KW - Remote coastal marine areas
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U2 - 10.1016/j.marpolbul.2022.114105
DO - 10.1016/j.marpolbul.2022.114105
M3 - Article
C2 - 36115196
AN - SCOPUS:85137751998
VL - 184
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
SN - 0025-326X
M1 - 114105
ER -