在一个具有空间异质污染分布的大盆地中追踪源和转化特征
Xiaojing Zhang1, Zhihong Liu2, Zhuohang Xin2
1School of Infrastruct Engineering, Dalian University of Technology, Dalian, 116024, China.
Environmental research
|August 29, 2024
概括
在中国的河流域,污染严重,便和污水被确定为主要的酸盐来源. 针对性的管理策略对于不同的河流系统至关重要,因为土地使用和人类活动各不相同.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 水文学的水文学
背景情况:
- 河流域 (LRB) 面临着严重的污染,酸盐占总的很大一部分.
- 在LRB的地表水质量经常超过环境标准,突出了迫切需要识别污染源的需求.
研究的目的:
- 通过使用稳定同位素分析,调查酸盐来源及其在河流域的地理分布.
- 评估不同水文和人为因素对LRB各种河流系统中酸盐污染的影响.
主要方法:
- 对水 (δD, δ18O) 和酸盐 (δ15N, δ18O) 的双稳定同位素分析.
- 应用贝叶斯同位素混合模型用于酸盐来源的归因.
- 在正常水文季节,在主要河流 (MLR,STR,HR,TZR,DLR) 中取水样.
主要成果:
- 93%的水样超过了总的地表水质量标准; 71.3%的是酸盐.
- 肥料/污水 (MS) 是主要的酸盐来源,在MLR中贡献了78%,在DLR中贡献了72%.
- 降水和蒸发等水地化学过程影响了水同位素,而在MLR中观察到脱.
结论:
- 在LRB的酸盐污染严重,主要是由肥/污水驱动的. 在盆地内,酸盐来源存在显著的空间变化.
- 土地利用和人类活动是这些空间差异的关键驱动因素,需要定制的管理策略.
- 同位素分析为复杂的循环和大河流盆地的污染动态提供了有效的见解.
更多相关视频
07:14Automated, High-resolution Mobile Collection System for the Nitrogen Isotopic Analysis of NOx
Published on: December 20, 2016
11.6K
08:05Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
Published on: October 7, 2020
6.1K
相关概念视频
The Nitrogen Cycle
51.8K
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
51.8K
Overview of Nitrogen Metabolism
7.9K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
7.9K
Bioremediation
18.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.2K
Primary Production
23.6K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
23.6K
What are Biogeochemical Cycles?
31.3K
The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.
31.3K
