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<p>The substrate was vital for removing pollutants from constructed wetlands (CWs). This study explored the treatment&#xa0;performance of&#xa0;CWs amended with different contents of&#xa0;basalt fiber with calcium modification (Ca-MBF) under various operational conditions. Results demonstrated that the performance of&#xa0;adding Ca-MBF outperformed the&#xa0;conventional substrate, which Ca-MBF&#xa0;increased nitrogen and phosphorus removal efficiencies around 12 ~ 14% and 7 ~ 14% no matter with the variations of&#xa0;operation conditions, especially the Ca-MBF group with the highest filling quantity (105&#xa0;g). Additionally, the largest&#xa0;number of Ca-MBF completely boosted the activity of dehydro­genase (DHA) and neutral phosphatase (NP), contributing to a&#xa0;positive responses of the microbial community. This specified that a reasonable quantity of Ca-MBF was advantageous for the system to resist changes in different environments. Moreover, high-throughput sequencing analysis revealed that Ca-MBF increased the abundance of microbial phyla like Proteobacteria, Actinobacteria, Firmicutes, and Nitrospirae. Overall, this study provided a novel perspective of improvements on the performance&#xa0;of CWs with different contents Ca-MBF.</p> Graphic Abstract <p></p>

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New Insights on Constructed Wetland Filled with Calcium-Modified Basalt Fiber with Different Quantities: Comprehensive Evaluation of Performance in Different Conditions

  • 期刊论文

  • 发表日期：

    2025年8月13日

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  • Juan Huang,
  • Jiawei Yao,
  • Zhihui Wei,
  • Xiuwen Qian,
  • Xinyue Wang

摘要

The substrate was vital for removing pollutants from constructed wetlands (CWs). This study explored the treatment performance of CWs amended with different contents of basalt fiber with calcium modification (Ca-MBF) under various operational conditions. Results demonstrated that the performance of adding Ca-MBF outperformed the conventional substrate, which Ca-MBF increased nitrogen and phosphorus removal efficiencies around 12 ~ 14% and 7 ~ 14% no matter with the variations of operation conditions, especially the Ca-MBF group with the highest filling quantity (105 g). Additionally, the largest number of Ca-MBF completely boosted the activity of dehydro­genase (DHA) and neutral phosphatase (NP), contributing to a positive responses of the microbial community. This specified that a reasonable quantity of Ca-MBF was advantageous for the system to resist changes in different environments. Moreover, high-throughput sequencing analysis revealed that Ca-MBF increased the abundance of microbial phyla like Proteobacteria, Actinobacteria, Firmicutes, and Nitrospirae. Overall, this study provided a novel perspective of improvements on the performance of CWs with different contents Ca-MBF.

Graphic Abstract