PFOA and PFOS induces mineralization of soil organic carbon by accelerating the consumption of dissolved organic carbon

被引：0
作者：
Li Y. [1 ]
Lv B. [1 ]
Chen Z. [1 ]
Xue J. [2 ]
Wu L. [3 ]
He X. [1 ]
Yang L. [1 ]
机构：
[1] Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan
[2] New Zealand Forest Research Institute (Scion), Forest System, POB 29237, Christchurch
[3] State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun
来源：
Carbon Research | 2024年 / 3卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Carbon emission; Mineralization; PFOA; PFOS; Selective priming;
D O I：
10.1007/s44246-023-00088-8
中图分类号：
学科分类号：
摘要：
The wide spread of Perfluoroalkyl substances (e.g., PFOA and PFOS) in soil can alter native soil geochemical properties and microbial communities through various approaches. Nonetheless, it is unclear that how PFOA and PFOS in soil affect the mineralization of soil organic carbon (SOC). A laboratory-scale culture experiment (180 d) was performed to explore the contribution of PFOA and PFOS to SOC dynamics and soil geochemical processes. Results showed that positive priming effect (PE) occurred in the short term (i.e., 30 days after PFOA and PFOS addition) and subsequently shifted to a slightly negative PE (i.e., 90 days) and remained in a significant negative PE thereafter (i.e., > 180 days). The PEs caused by PFOA and PFOS both accelerated the consumption of dissolved organic carbon (DOC), resulting in a significant increase in SOC mineralization (10.45%–127.36%) under the short-term incubation (30 d). As for long-term exposure (> 90 d), the organic carbon mineralization rate was significantly reduced (58.30%–65.24%) due to the excessive DOC consumption in the initial stage. High throughput analysis indicated that both PFOA and PFOS changed soil bacterial and fungal community structures, altered the relevant metabolic pathways and resulted in the enrichment of specific taxa. Graphical Abstract: (Figure presented.) © The Author(s) 2024.
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