Industrial activities pose a significant ecological risk to water resources as they pollute surrounding waters with vanadium (V). Although the contribution of plants and substrates to V removal in constructed wetlands (CWs) has been reported, the role of arbuscular mycorrhizal fungi (AMF) is unclear. The aim of the present study was to investigate the role of AMF in V removal in CWs and to elucidate the underlying mechanisms. Reed plants () were inoculated with an AMF strain () in CW columns, creating AMF-inoculated (+AMF) and non-inoculated (-AMF) treatments. Three levels of influent V concentrations (low: 0.50 mg L, medium: 1.14 mg L and high: 1.52 mg L) were examined. The + AMF treatment showed higher V removal (60%–98%) than the control (40%–82%) in all three conditions, although the difference was not significant in some cases. The mean mycorrhizal effects were 75%, 19%, and 28% for low, moderate, and high influent V concentrations, respectively. The +AMF treatment showed a higher GRSP-bonded V concentration (5.5 mg g) than the -AMF treatment (4.0 mg g). Furthermore, +AMF treatment showed larger plants with higher V concentrations in their tissues, accompanied by increased biological concentration factors and biological accumulation factors. Given the remarkable positive effect of AMF on V removal, our study suggests that treating AMF in CWs is a worthwhile approach.

中文翻译：

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改善人工湿地受污染河水中的钒去除：丛枝菌根真菌的作用

工业活动对水资源造成重大生态风险，因为工业活动会用钒 (V) 污染周围水域。尽管植物和基质对人工湿地 (CW) 中 V 去除的贡献已有报道，但丛枝菌根真菌 (AMF) 的作用尚不清楚。本研究的目的是调查 AMF 在 CW 去除 V 中的作用并阐明其潜在机制。在 CW 柱中用 AMF 菌株 () 接种芦苇植物 ()，形成 AMF 接种 (+AMF) 和未接种 (-AMF) 处理。检查了三个水平的进水 V 浓度（低：0.50 mg·L，中：1.14 mg·L，高：1.52 mg·L）。在所有三种情况下，+ AMF 处理的 V 去除率 (60%–98%) 均高于对照 (40%–82%)，但在某些情况下差异并不显着。对于低、中和高进水 V 浓度，平均菌根效应分别为 75%、19% 和 28%。 +AMF 处理显示出比 -AMF 处理（4.0 mg·g）更高的 GRSP 键合 V 浓度（5.5 mg·g）。此外，+AMF处理显示较大的植物在其组织中具有较高的V浓度，同时生物浓缩因子和生物积累因子增加。鉴于 AMF 对 V 去除具有显着的积极作用，我们的研究表明，在 CW 中治疗 AMF 是一种值得的方法。