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生物增量在模拟地下水系统中对无氧农药生物降解有暂时的影响

Andrea Aldas-Vargas¹, Jannigje G Kers², Hauke Smidt²

¹Environmental Technology, Wageningen University & Research, P.O. Box 17, 6700 EV, Wageningen, The Netherlands.

|July 13, 2023

概括

使用微生物群落的生物增量 (BA) 可以增强农药在地下水中的生物降解. 这项研究表明,在降低铁和硫酸盐的条件下,BA暂时改善了2,4-D去除,这突显了它对无氧系统的价值.

科学领域:

环境微生物学环境微生物学
地下水的整治,就是地下水的整治.
生物修复技术生物修复技术

背景情况:

地下水对于荷兰的饮用水至关重要,但受到杀虫剂的威胁.
农药的生物降解受到微生物群落在寡质地下水中的限制.
生物增量 (BA) 可以增强农药在地下水中的生物降解.

研究的目的:

在模拟无氧地下水系统中研究BA与缩混合注射剂对农药生物降解的影响.
为了评估不同氧化还原条件 (减少铁和硫酸盐) 对BA有效性的影响.
评估BA对微生物群落结构的影响及其与除草剂清除的关系.

主要方法:

模拟地下水系统的两个柱式生物反应堆运行了800天.
使用来自废水处理厂的注射剂进行了两轮生物增量 (BA1和BA2).
监测了氧化条件 (降低铁和硫酸盐) 和2,4-D去除效率,以及微生物社区分析.

主要成果:

在两种氧化还原条件下,生物增强 (BA1) 在100天内暂时实现了100%的2,4-D去除.
在减少铁的条件下,2,4-D的去除率高于减少硫酸盐的条件下.
微生物群落的暂时转移与BA1后增加的2,4-D去除相关;在BA2后没有观察到社区转移.

结论:

用混合注射剂进行生物增量是一种有价值的技术,用于增强无氧地下水中的农药生物降解.
氧化还原条件显著影响生物降解过程的效率.
进一步的研究可能会优化 BA 策略,以持续地去除地下水中的农药.

关键词:

2,4-D是什么意思? 2,4-D是什么意思?生物增强是一种生物增强.生物降解生物降解地下水的地下水.杀虫剂是一种杀虫剂.

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