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Study on non-extractable residues of PAHs in sediments and their effects on source analysis
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Er-xuan HAN1, Xiao-shui LI1, *, Shi-bin QIN2, Wei-jie LIU3, Huan LI3, Zi-yang YE1, Shi-hua QI1, 3
China Environmental Science | 2025, 45(7) : 3916 - 3924
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China Environmental Science | 2025, 45(7): 3916-3924
• Environmental Ecology •
Study on non-extractable residues of PAHs in sediments and their effects on source analysis
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Er-xuan HAN1, Xiao-shui LI1, *, Shi-bin QIN2, Wei-jie LIU3, Huan LI3, Zi-yang YE1, Shi-hua QI1, 3
Affiliations
  • 1.State Key Laboratory of Geomicrobiology and Environmental Changes, China University of Geosciences (Wuhan), Wuhan 430074, China
  • 2.Institute of Eco-Environmental Research, Guangxi Academy of Sciences, Nanning 530007, China
  • 3.School of Environment, China University of Geosciences (Wuhan), Wuhan 430074, China
Published: 2025-07-20
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Surface sediments of Dongting Lake were selected as the research object and the concentrations of non-extractable polycyclic aromatic hydrocarbons (PAHs) in the samples were analyzed using a combination of silanization and acidification methods. The study aims to investigate the impact of non-extractable residues on the pollution levels and source analysis of PAHs. The inclusion of non-extractable residues significantly altered the concentration and compositional characteristics of PAHs in the samples, raising the proportions of 3-ring PAHs from (19.78% ± 8.80%) in extractable fractions to (32.97% ± 11.16%) in total concentrations. The proportions of non-extractable PAHs did not exhibit a significant strong correlation with organic carbon or particle size, but were more affected by the total concentration of targets and pollution sources. Source apportionment results revealed that, after considering non-extractable residues, the main pollution sources shifted from traffic emissions (46.91%) to biomass and coal combustion sources (40.70%). The non-extractable residues play an important role in the source analysis of PAHs.

sediment  /  polycyclic aromatic hydrocarbons  /  non-extractable residues  /  pollution characteristics  /  source apportionment
韩尔瑄, 李小水, 秦世斌, 刘威杰, 李欢, 叶子杨, 祁士华. 沉积物中PAHs不可萃取组分及其对源解析的影响. 中国环境科学, 2025 , 45 (7) : 3916 -3924 .
Er-xuan HAN, Xiao-shui LI, Shi-bin QIN, Wei-jie LIU, Huan LI, Zi-yang YE, Shi-hua QI. Study on non-extractable residues of PAHs in sediments and their effects on source analysis[J]. China Environmental Science, 2025 , 45 (7) : 3916 -3924 .
Appendix
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Year 2025 volume 45 Issue 7
87
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  • Receive Date：2024-12-15
  • Online Date：2026-10-08
  • Published：2025-07-20
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  • Received：2024-12-15
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Affiliations
    1.State Key Laboratory of Geomicrobiology and Environmental Changes, China University of Geosciences (Wuhan), Wuhan 430074, China
    2.Institute of Eco-Environmental Research, Guangxi Academy of Sciences, Nanning 530007, China
    3.School of Environment, China University of Geosciences (Wuhan), Wuhan 430074, China
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表12种不同金属材料的力学参数
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Family		 属数
Number of
genus		 种数
Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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