酸盐的来源和命运在不和区中的和湖平原
Yuqin Wang1, Guangcai Wang1, Fu Liao1
1State Key Laboratory of Biogeology and Environmental Geology & MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences, Beijing 100083, China; School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China.
Journal of hazardous materials
|March 1, 2025
概括
酸盐污染是一个主要的环境问题. 这项研究揭示了土壤特性和微生物过程如何控制不和区中的气运动,为地下水管理提供了洞察力.
科学领域:
- 环境科学 环境科学
- 水文地质学 水文地质学
- 生物地质化学生物地质化学
背景情况:
- 农业产生的酸盐污染对全球生态系统产生影响.
- 了解不和区的气行为至关重要,但有限.
- 对物种的水文地质控制需要进一步调查.
研究的目的:
- 在不和区调查物种的来源,运输和转化.
- 阐明对酸盐行为的水文地质和生物地化学控制.
- 开发一个反应性运输的概念模型.
主要方法:
- 使用了自组织地图 (SOM) 和稳定同位素分析 (δ15N-NO3−, δ18O-NO3−, δ15N-NH4+).
- 分析了土壤质地,物理化学特性和地质化学区域.
- 检查了物种的分布和转化过程.
主要成果:
- 确定了四个不同的垂直土壤地质化学和N物种区域.
- 确定酸盐主要来自肥料和土壤.
- 观察到矿化,化和酸盐降解为氨 (DNRA) 是关键的转化过程.
- 发现化减少和DNRA从平原到湖地区增加.
结论:
- 水地质条件和生物地化学过程显著影响酸盐在不和区的行为.
- 土壤属性的空间异质性会产生不同的区域,影响循环.
- 该研究提供了反应性运输的概念模型.
- 这些发现有助于制定管理地下水污染的战略.
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