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生物活性过 (BAF) 用于从受污染的地下水中代谢性去除1,4-二

Yuyin Tang¹, Mian Wang¹, Arjun K Venkatesan²

¹Department of Civil Engineering, Stony Brook University, Stony Brook, NY 11794, United States; New York State Center for Clean Water Technology, Stony Brook University, Stony Brook, NY 11794, United States.

Journal of hazardous materials

|March 6, 2025

概括

生物活性过 (BAF) 在环境相关水平上有效降解持久性水污染物1,4-二氧化. 像NOM和1,1-DCE这样的共污染物阻碍了去除,需要预处理以获得最佳的BAF性能.

科学领域:

环境科学环境科学
环境工程环境工程
微生物学微生物学

背景情况:

1,4-二氧化是一种持久性有机污染物,对常规水处理具有抗性.
对于环境相关度 (<1000μg/L) 的1,4-二素,需要有效的补救策略.

研究的目的:

开发和评估基于实验室规模的颗粒活性炭 (GAC) 的生物活性过 (BAF) 系统,用于1,4-二二的代谢降解.
评估BAF在不同度的1,4-二,液压负载率,以及在存在共污染物 (NOM,1,1-DCE) 的情况下的性能.

主要方法:

已建立的BAF系统使用GAC接种了一种1,4-Dioxane降解微生物群体.
测试了在1,4-二氧化影响度 (100-1000μg/L) 和液压负载速率 (3.6-14cm/h) 中的去除效率.
研究了天然有机物 (NOM) 和1,1-二乙烯 (1,1-DCE) 对BAF性能的影响.

主要成果:

BAFs在100μg/L的入流和测试载荷率下实现了69±7%的1,4-二氧化去除,废水度低至21μg/L.
NOM和1,1-DCE显著抑制了1,4-Dioxane的去除,表明需要预处理.
微生物分析证实了1,4-二氧化碳降解细菌 (CB1190类) 和关键基因 (dxmB,aldh) 在上列部分的丰富.

结论:

在环境相关水平上,BAF系统显示了1,4-二素的有效代谢降解.
预处理以去除辅助污染物对于保持BAF效率至关重要.
该研究为设计使用BAF的改进的1,4-二二修复策略提供了有价值的见解.

关键词:

1,4-二氧化的使用方法生物活性炭生物活性炭生物活性过的过方法代谢性的生物降解.

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