TY - JOUR
T1 - Distribution characteristics of terrestrial PGEs and its trend into the sea around Hainan Island, China
AU - Wang, Ling
AU - Liu, Yuyan
AU - Li, Zhixin
AU - Yi, Hongwei
AU - Wang, Zefeng
AU - Liu, Haofeng
AU - Wu, Dan
AU - Li, Ye
AU - Liu, Min
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2025/2/1
Y1 - 2025/2/1
N2 - Hainan Island, the largest tropical island in China, is a notable source of pollutants, with a significant proportion of terrigenous contaminants discharged into the ocean. Platinum group elements (PGEs) pose potential risks to both the environment and human health, but research on this topic remains limited. In this study, we analyzed water from Hainan Island offshore area to investigate distribution characteristics of PGEs and its trend into the sea. It is found that the concentration of dissolved PGEs (PGEsD) is PdD > RhD > PtD, and the concentration of suspended particular PGEs (PGEsP) is PdP > PtP > RhP. Concentrations of PGEs are generally lower in the western part of the island compared to the east, due to differences in climate, regional development, and coastal zone types, and the high concentration of PGEs is relatively concentrated in the estuary-offshore of large rivers. Affected by the physical and chemical properties of the water, hydrodynamic conditions and the shape of the estuary, the average concentration of PGEsD increased greatly at first and then decreased slowly from the estuary to the offshore as the average concentration of PGEsP showed a slow decreasing trend. According to the Kd, Pd and Rh mainly exist in dissolved state, while Pt mainly exists in suspended state. It is calculated that Hainan Island annually discharges an average of Pd 787.98 kg, Rh 33.14 kg, and Pt 193.48 kg into the sea. This study further expands and deepens the research on the environmental geochemical process of new pollutant PGEs.
AB - Hainan Island, the largest tropical island in China, is a notable source of pollutants, with a significant proportion of terrigenous contaminants discharged into the ocean. Platinum group elements (PGEs) pose potential risks to both the environment and human health, but research on this topic remains limited. In this study, we analyzed water from Hainan Island offshore area to investigate distribution characteristics of PGEs and its trend into the sea. It is found that the concentration of dissolved PGEs (PGEsD) is PdD > RhD > PtD, and the concentration of suspended particular PGEs (PGEsP) is PdP > PtP > RhP. Concentrations of PGEs are generally lower in the western part of the island compared to the east, due to differences in climate, regional development, and coastal zone types, and the high concentration of PGEs is relatively concentrated in the estuary-offshore of large rivers. Affected by the physical and chemical properties of the water, hydrodynamic conditions and the shape of the estuary, the average concentration of PGEsD increased greatly at first and then decreased slowly from the estuary to the offshore as the average concentration of PGEsP showed a slow decreasing trend. According to the Kd, Pd and Rh mainly exist in dissolved state, while Pt mainly exists in suspended state. It is calculated that Hainan Island annually discharges an average of Pd 787.98 kg, Rh 33.14 kg, and Pt 193.48 kg into the sea. This study further expands and deepens the research on the environmental geochemical process of new pollutant PGEs.
KW - Annual flux
KW - Estuary-offshore
KW - Hainan Island
KW - Influencing factors
KW - PGEs
KW - Trend of entering the sea
UR - https://www.scopus.com/pages/publications/85215074713
U2 - 10.1016/j.scitotenv.2025.178372
DO - 10.1016/j.scitotenv.2025.178372
M3 - 文章
C2 - 39826217
AN - SCOPUS:85215074713
SN - 0048-9697
VL - 963
JO - Science of the Total Environment
JF - Science of the Total Environment
M1 - 178372
ER -
