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<p>Per– and polyfluoroalkyl substances (PFAS), especially perfluorobutane sulfonate (PFBS), are persistent organic pollutants with significant ecological risks. This study investigates the effect of PFBS on the properties of coastal sediment, including physicochemical characteristics microbial enzymatic activities, and community structure, in a tidal marsh on the Shandong Peninsula, China. 0, 0.1, 10, and 1000&#xa0;µg/g PFBS were added to the sediments and incubated at 20&#xa0;°C for six weeks. To evaluate changes in total organic carbon (TOC), total nitrogen (TN), microbial metabolites, enzyme activities, and community diversity. The results showed that PFBS concentration has a strong effect on TOC accumulation, pore water TOC decreased to 0.69 times the control level at 0.1&#xa0;µg/g PFBS (<i>p</i> &lt; 0.05) but increased sharply 2.95 times the control (37.74 ± 3.31&#xa0;mg/L) at 1000&#xa0;µg/g PFBS. Enzymatic stress response, with urease and phosphatase activities increased 2.91 times and 2.95 times, respectively, at the highest PFBS concentration (1000&#xa0;µg/g, <i>p</i> &lt; 0.05), suggesting microbial compensation mechanisms. Furthermore, PFBS significantly altered microbial community composition, reducing the relative abundance of <i>Nitrososphaerota</i> (a key nitrifying phylum) by 76% at 1000&#xa0;µg/g PFBS. These results highlight the potential of PFBS to disrupt microbial dynamics and nutrient cycling in coastal sediments, and underscoring the importance of monitoring short‒chain perfluorinated compounds (PFCs) in the environments due to their potential long‒term ecological risks.</p>

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Effect of Perfluorobutane Sulfonic Acid On Microbial Community and Functional Enzyme of Nitrogen Cycling in Coastal Sediment

  • 期刊论文

  • 发表日期：

    2025年8月7日

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  • Yucan Liu,
  • Baoyan Wang,
  • Jing Hu,
  • Hongwei Sun,
  • Xintao Lv,
  • Zhiming Qu,
  • Xiaoyong Yang,
  • Gang Wang,
  • Yanxiang Zhang,
  • Shujun Zhang

摘要

Per– and polyfluoroalkyl substances (PFAS), especially perfluorobutane sulfonate (PFBS), are persistent organic pollutants with significant ecological risks. This study investigates the effect of PFBS on the properties of coastal sediment, including physicochemical characteristics microbial enzymatic activities, and community structure, in a tidal marsh on the Shandong Peninsula, China. 0, 0.1, 10, and 1000 µg/g PFBS were added to the sediments and incubated at 20 °C for six weeks. To evaluate changes in total organic carbon (TOC), total nitrogen (TN), microbial metabolites, enzyme activities, and community diversity. The results showed that PFBS concentration has a strong effect on TOC accumulation, pore water TOC decreased to 0.69 times the control level at 0.1 µg/g PFBS (p < 0.05) but increased sharply 2.95 times the control (37.74 ± 3.31 mg/L) at 1000 µg/g PFBS. Enzymatic stress response, with urease and phosphatase activities increased 2.91 times and 2.95 times, respectively, at the highest PFBS concentration (1000 µg/g, p < 0.05), suggesting microbial compensation mechanisms. Furthermore, PFBS significantly altered microbial community composition, reducing the relative abundance of Nitrososphaerota (a key nitrifying phylum) by 76% at 1000 µg/g PFBS. These results highlight the potential of PFBS to disrupt microbial dynamics and nutrient cycling in coastal sediments, and underscoring the importance of monitoring short‒chain perfluorinated compounds (PFCs) in the environments due to their potential long‒term ecological risks.