Pedosphere 34(4): 736--748, 2024
ISSN 1002-0160/CN 32-1315/P
©2024 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Co-occurrence of per- and polyfluoroalkyl substances, heavy metals and polycyclic aromatic hydrocarbons and their composite impacts on microbial consortium in soil: A field study |
Meng ZHANG1,2, Qing WANG2,3, Xin SONG2,3 , Mukhtiar ALI2,3, Zhiwen TANG2,3, Xin LIU2, Zhuanxia ZHANG2,3, Shurong MA1, Jinhui BI4, Zhongyuan LI5 |
1 Key Laboratory of Saline-Alkali Vegetation Ecology Restoration, Northeast Forestry University, Harbin 150040 (China);
2 Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);
3 University of Chinese Academy of Sciences, Beijing 100049 (China);
4 Center International Group Co., Ltd., Beijing 101160 (China);
5 China Construction Eighth Engineering Division Corp., Ltd., Shanghai 200122 (China) |
| ABSTRACT |
| This is the first study to report the co-occurrence of per- and polyfluoroalkyl substances (PFASs), heavy metals, and polycyclic aromatic hydrocarbons (PAHs) and their impacts on the native microbial consortium in soil due to the long-term exposure. The PFASs, heavy metals, and PAHs were detected in soil samples collected at 2–6 m below the ground surface at different sampling locations in a steel-making factory. The total concentrations of PFASs varied from 6.55 to 19.79 ng g-1, with perfluorooctane sulfonate (PFOS), perfluorobutane sulfonate, and 6:2 chlorinated polyfluorinated ether sulfonate (alternative of PFOS) being the predominant PFASs. The concentrations of arsenic, cadmium, and lead were detected in the ranges of 4.40–1 270.00, 0.01–8.67, and 18.00–647.00 mg kg-1, respectively, and the concentration of total PAHs was detected in the range of 1.02–131.60 mg kg-1. The long-term exposure to mixed contaminants of PFASs, heavy metals, and PAHs led to lower richness and diversity of microbial communities in soil. The soil bacterial communities were mainly composed of Pseudomonas, norank_p_GAL15, Leptothrix, norank_o_Rokubacteriales, and Acinetobacter. Correlations between soil environmental factors and microbial communities indicated that cation exchange capacity and total phosphorus were two key factors in shaping the composition of native microbial communities. Furthermore, Arthrobacter, Leptothrix, and Sphingobium were found to be significantly positively correlated with PFAS concentrations, indicating that these genera could tolerate the stress exerted by PFASs, along with the stress imposed due to the presence of heavy metals or/and PAHs. |
| Key Words: arsenic,cation exchange capacity,mixed contaminant,native microbial community,perfluorooctane sulfonate,total phosphorus |
| Citation: Zhang M, Wang Q, Song X, Ali M, Tang Z W, Liu X, Zhang Z X, Ma S R, Bi J H, Li Z Y. 2024. Co-occurrence of per- and polyfluoroalkyl substances, heavy metals and polycyclic aromatic hydrocarbons and their composite impacts on microbial consortium in soil: A field study. Pedosphere. 34(4): 736–748. |
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