Spatiotemporal distribution and source variations of hydrocarbons in surface sediments from the Pearl River Estuary, Southern China

Zhang, Yanzhen1; Sun, Yongge1; Liu, Ben1,2; Wang, Yuntao3; Xie, Wei4,5; Wang, Peng6; Zhang, Chuanlun7; He, Ding1,3

2020-09-19

10.1007/s11368-020-02783-0

JOURNAL OF SOILS AND SEDIMENTS   影响因子和分区

1439-0108

1614-7480

Purpose Variations in hydrocarbon composition and concentration are essential for the assessment of its source and environmental health in estuarine environments. This study aims to reveal the spatial and temporal distribution of multiple hydrocarbons in surface sediments of the Pearl River Estuary, and to further determine various sources of these hydrocarbons. Materials and methods Surface sediments were taken monthly from four sites along a spatial transect from the Pearl River Estuary in a whole year by using a gravitational bottom sampler. A series of bulk parameters including the grain size, total organic carbon content, and total nitrogen content were measured. Hydrocarbons in sediments were extracted and analyzed by the gas chromatography-mass spectrometry. Results and discussion The abundances of higher plants and phytoplankton-derivedn-alkanes, petrogenically derived pristane, phytane, hopanes, and steranes with geological configuration, and anthropogenically derived hydrocarbons, including linear alkylbenzenes and polycyclic aromatic hydrocarbons all showed decreasing trends towards the coastal ocean. In contrast, the diatom-derivedC(25)highly branched isoprenoids increased towards saline sites. Monthly fluctuations of aliphatic and aromatic hydrocarbons at the estuarine mouth were smaller than the upstream freshwater sites, where high monthly variation (up to fivefold) was observed for most of the hydrocarbons detected. Conclusions This study showed substantial monthly and spatial variations of hydrocarbons in the surface sediments of the Pearl River Estuary. Distribution and composition of sedimentary hydrocarbons indicate mainly anthropogenic inputs (e.g., petroleum residues and synthetic detergents) and terrestrially higher plants, followed by aquatic inputs.

Surface sediments Source Hydrocarbons Pearl River Estuary Biomarkers

SCI

英语

其他

National Science Foundation of China[41973070][41773098] ; hundred talent program of Zhejiang University[188020*194231701/008] ; open fund of State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, MNR[QNHX1912]

Environmental Sciences & Ecology ; Agriculture

Environmental Sciences ; Soil Science

WOS:000571020900001

SPRINGER HEIDELBERG

AGRICULTURAL SCIENCES

Web of Science

1.Zhejiang Univ, Sch Earth Sci, Key Lab Geosci Big Data & Deep Resource Zhejiang, Hangzhou, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou, Peoples R China
3.Minist Nat Resources, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Peoples R China
4.Sun Yat Sen Univ, Dept Marine Sci, Zhuhai, Peoples R China
5.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519082, Peoples R China
6.Tongji Univ, Sch Ocean & Earth Sci, Shanghai, Peoples R China
7.Southern Univ Sci & Technol, Shenzhen Key Lab Marine Archaea Geoom, Shenzhen, Peoples R China

Zhang, Yanzhen,Sun, Yongge,Liu, Ben,et al. Spatiotemporal distribution and source variations of hydrocarbons in surface sediments from the Pearl River Estuary, Southern China[J]. JOURNAL OF SOILS AND SEDIMENTS,2020,21(1).

Zhang, Yanzhen.,Sun, Yongge.,Liu, Ben.,Wang, Yuntao.,Xie, Wei.,...&He, Ding.(2020).Spatiotemporal distribution and source variations of hydrocarbons in surface sediments from the Pearl River Estuary, Southern China.JOURNAL OF SOILS AND SEDIMENTS,21(1).

Zhang, Yanzhen,et al."Spatiotemporal distribution and source variations of hydrocarbons in surface sediments from the Pearl River Estuary, Southern China".JOURNAL OF SOILS AND SEDIMENTS 21.1(2020).