Influence of plant species on triclosan removal and associated microbial communities in the vertical-flow constructed wetland

Cleaner Water Pub Date : 2025-01-27 DOI:10.1016/j.clwat.2025.100066

Naveen Chand , Vineet Singh , Surindra Suthar

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Abstract

This study investigated plant species' role in removing triclosan (TCS) and functional bacterial diversity in the rhizosphere of vertical flow-constructed wetlands (VFCWs). Two VFCWs with similar configurations but different plants i.e., Colocasia (CB-VFCW) and Typha (TB-VFCW) were established and TCS removal was recorded under four cycles of 216 hrs HRT. The TB-VFCWs showed the maximum average TCS removal (89.41 %) during studied HRT than CB-VFCWs (79.4 %) (p > 0.05). The respective removal of COD, NH₄⁺-N and NO₃^- -N was found to be 89.5 %, 84.8 % and 77.5 % in TB-TFCW and 79.88 %, 87.16 % and 66.25 % in CB-VFCWs, suggesting significant variations between VFCWs. 16S data analysis suggested variations between CB-VFCW and TB-VFCW for bacterial abundance, species diversity and richness. Proteobacteria especially the Beta subdivision found to be the dominant bacterial community showing positive correlations with TCS reductions. Results found that plant species selection could be a valuable approach for the enrichment of ecologically relevant microbiota in VFCWs involved in organic pollutant removals in such systems.

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垂直流人工湿地中植物种类对三氯生去除及相关微生物群落的影响

本研究探讨了垂直流人工湿地（VFCWs）根际植物对三氯生（TCS）的去除作用及功能性细菌多样性。建立了两个结构相似但不同植物的vfcw，即大芋草（CB-VFCW）和台风（TB-VFCW），并在216 h HRT的4个循环下记录了TCS的去除情况。在HRT期间，TB-VFCWs的TCS平均去除率（89.41 %）高于CB-VFCWs(79.4% %)（p >； 0.05）。TB-TFCW对COD、NH4+- n和NO3- - n的去除率分别为89.5 %、84.8 %和77.5 %，cb - vfcw对COD、NH4+- n和NO3- - n的去除率分别为79.88 %、87.16 %和66.25 %，不同vfcw之间存在显著差异。16S数据分析表明，CB-VFCW和TB-VFCW在细菌丰度、物种多样性和丰富度方面存在差异。变形杆菌，特别是β分支是主要的细菌群落，显示出与TCS降低正相关。结果发现，植物物种选择可能是VFCWs中参与有机污染物去除的生态相关微生物群富集的一种有价值的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Cleaner Water

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