不同溶解有机成分的反应运输在一个不受限制的含水层
Yang Liu1, Tianyuan Zheng1, Bo Guo2
1College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
Journal of hazardous materials
|April 26, 2025
概括
溶解有机 (DON) 成分在含水层中表现不同. 尿素的流动性有酸污染的风险,而氨基酸和蛋白质有助于脱,保护地下水质量.
科学领域:
- 环境科学 环境科学
- 水文地质学 水文地质学
- 微生物学 微生物学
背景情况:
- 从土壤中溶解的有机 (DON) 浸出,在含水层中构成区域污染风险.
- 之前的研究重点是垂直DON漏,忽视了地下水流下的含水层中的反应性运输.
- 了解DON在含水层循环中的作用对于地下水保护至关重要.
研究的目的:
- 研究DON成分 (尿素,氨基酸,蛋白质) 在含水层中的反应运输.
- 阐明地下水流对DON运输和转化的影响.
- 用分子生物学技术揭示DON在水表循环中的内在作用.
主要方法:
- 在模拟地下水流条件下对尿素,氨基酸和蛋白质的反应运输进行实验性研究.
- 利用分子生物学技术来分析微生物社区的组成和功能.
- 量化酸盐- (NO3--N) 度的变化,并评估生物转化和吸附效应.
主要成果:
- 尿素表现出比氨基酸和蛋白质更高的流动性.
- 氨基酸和蛋白质降低了NO-N度,分别降低了44.6%和89.6%,与增加的无化细菌 (Pseudomonas, Thermomonas) 相联系.
- 尿素增加了NO-N度10.1%,并促进了化细菌 (Nitrosomonadaceae,Nitrophilus),表明了污染风险. 生物转化主要影响蛋白质 (19.6%),而吸附影响氨基酸 (12.4%).
结论:
- 不同的DON成分表现出不同的运输行为和对水表地质化学和微生物群落的影响.
- 氨基酸和蛋白质可以促进脱,减轻污染.
- 尿素对地下水中酸盐的积累构成重大风险,需要针对区域地下水保护制定有针对性的管理策略.
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