Vertical distribution and influencing factors of soil PAHs under different ecosystem habitats in the Liaohe River Estuary Wetlands, Northeastern China

被引:0
|
作者
Ying, Zeguo [1 ,2 ]
Chen, Shuyu [1 ]
Zhang, Chuchu [3 ]
Liao, Qihang [3 ,4 ]
Yuan, Feng [3 ]
Feng, Dawei [1 ]
Wang, Siwen [1 ]
Liu, Qing [1 ]
Hao, Zhe [1 ]
机构
[1] Nanjing Normal Univ, Sch Marine Sci & Engn, Jiangsu Key Lab Ocean Land Environm Change & Ecol, Nanjing 210023, Peoples R China
[2] Fudan Univ, Dept Environm Sci & Engn, Shanghai 200441, Peoples R China
[3] Nanjing Univ, Sch Geog & Oceanog Sci, Minist Educ, Key Lab Coast & Isl Dev, Nanjing 210093, Peoples R China
[4] Nanjing Univ, Collaborat Innovat Ctr South China Sea Studies, Nanjing 210093, Peoples R China
基金
中国国家自然科学基金;
关键词
Polycyclic aromatic hydrocarbons; Vertical distribution; Ecosystem habitats; Influencing factors; Liaohe River Estuary Wetland; POLYCYCLIC AROMATIC-HYDROCARBONS; SUSPENDED PARTICULATE MATTER; COASTAL SALT-MARSH; SOURCE APPORTIONMENT; SURFACE SEDIMENTS; ORGANIC-MATTER; SOURCE IDENTIFICATION; SPATIAL-DISTRIBUTION; AGRICULTURAL SOILS; ECOLOGICAL RISK;
D O I
10.1016/j.marpolbul.2024.117289
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The vertical distribution, sources and influencing factors of polycyclic aromatic hydrocarbons (PAHs) in soil across ecosystem habitats were investigated around the Liaohe River Estuary (LRE) Wetland. The concentration of Sigma 16PAHs ranged from 41.0 to 435.4 ng g-1 dw, with a predominance of low molecular weight PAHs. Overall, PAHs and physicochemical properties of soil decreased with depth. Vegetation was found to increase soil PAHs. Additionally, soil physicochemical properties also regulated PAHs concentration, particularly for PAHs with high molecular weight. Among the habitats, total organic carbon was the key influencing factor for Suaeda heteroptera, while specific surface area was crucial for Phragmites australis. Results of characteristic ratio method and principal component analysis revealed that PAHs in LRE primarily originate petroleum, coal and biomass combustion. In summary, vegetation colonization significantly affected the distribution, sources, and controlling factors of PAHs. These findings are meaningful for management of soil PAHs across various ecosystem habitats.
引用
收藏
页数:12
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