[Spatial-temporal Distribution and Source Analysis of Polycyclic Aromatic Hydrocarbons in the Sediments of Poyang Lake]

Yan Ma; Chen Sun; Jia-le Bi; Bo-Tao Zhang; Yan Liu; Peng Shao; Tong Liu; Sheng-Rui Wang; Wen-Jun Zhong

doi:10.13227/j.hjkx.202304004

[Spatial-temporal Distribution and Source Analysis of Polycyclic Aromatic Hydrocarbons in the Sediments of Poyang Lake]

Huan Jing Ke Xue. 2024 Mar 8;45(3):1492-1501. doi: 10.13227/j.hjkx.202304004.

[Article in Chinese]

Authors

Yan Ma¹, Chen Sun^{1

2}, Jia-le Bi^{1

2}, Bo-Tao Zhang², Yan Liu³, Peng Shao³, Tong Liu^{1

2}, Sheng-Rui Wang², Wen-Jun Zhong⁴

Affiliations

¹ School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China.
² College of Water Sciences, Beijing Normal University, Beijing 100875, China.
³ Institute of Analysis and Testing, Beijing Academy of Science and Technology(Beijing Center for Physical & Chemical Analysis), Beijing 100094, China.
⁴ Wetland Ecological Resources Research Center, Jiangxi Academy of Forestry, Nanchang 330032, China.

PMID: 38471864
DOI: 10.13227/j.hjkx.202304004

Abstract

The concentrations, spatial-temporal distribution, and influencing factors of 16 polycyclic aromatic hydrocarbons (PAHs) in the sediments of Poyang Lake were studied, and a quantitative source analysis of PAHs in different areas of the lake was conducted. PAHs were widespread within the sediments. The concentrations of ∑₁₆PAHs in the surface sediments of all sites ranged from 203 to 2 318 μg·kg^-1. The concentrations of PAHs in the surface sediments of the lake body were higher than those in the surface sediments of the inlet rivers. The ratio of PAHs in Poyang Lake was 4 rings > 5 rings > 6 rings > 3 rings > 2 rings; the composition of 4-ring PAHs was dominant, and its content accounted for 86.11% of ∑₁₆PAHs. The 2- and 3-ring and some 4-ring PAHs, including Flua and Pyr, were more susceptible to SOM, and the 4 through 6-ring PAHs were more susceptible to ORP and heavy metals and other environmental factors. Spatially, the higher concentration of ∑₁₆PAHs occurred in the area of the lake adjacent to Duchang County and Poyang County, where the terrain was relatively closed, and the water exchange with the surrounding area was less than that in other sections, which was not conducive to the migration, transformation, and degradation of pollutants. In the temporal distribution, the changes in PAHs concentration level and the development of GDP in Jiangxi Province showed high consistency, and the influence of economic development and human activities might have been the main reason for the increasing PAHs concentration level. The main sources of PAHs in surface sediments of Poyang Lake included petroleum pollution and oil and coal and biomass combustion sources, and there were some spatial differences in PAHs sources in different regions. This study can provide a reference for PAHs pollution in surface sediments of Poyang Lake, which is important for the ecological environmental protection and management of Poyang Lake.

Keywords: Poyang Lake; polycyclic aromatic hydrocarbons (PAHs); sediment; source analysis; spatial and temporal distribution.

Publication types

English Abstract