酸盐的动态受到土地利用和盐水侵入沿海水文相互作用系统的影响
Hao Geng1, Guiyao Xiong2, Mengwen Liu1
1Key Laboratory of Surficial Geochemistry of Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China.
Journal of hazardous materials
|June 22, 2025
概括
古盐水入区 (PSIA) 和现代海水入区 (MSIA) 的酸盐来源和动态不同. 土地利用是关键的,土壤N主导PSIA和便/污水在MSIA,影响沿海生态稳定.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 地质化学 地质化学
背景情况:
- 酸盐动态对于沿海生态稳定和全球循环至关重要.
- 复杂的来源和转化挑战了沿海水文系统中酸盐动态的理解.
研究的目的:
- 研究土地利用和水文相互作用对酸盐动态的影响.
- 为了比较古盐水侵入区域 (PSIA) 和现代海水侵入区域 (MSIA) 的酸盐来源和过程.
主要方法:
- 同位素组成分析.
- 贝叶斯混合模型.贝叶斯混合模型.
- 对PSIA和MSIA进行比较.
主要成果:
- 在PSIA中,土壤N是主要的酸盐来源 (45.8%77.7%),而在MSIA中,肥料和污水占主导地位 (36.0%45.0%).
- 土地利用显著影响了酸盐来源和水文相互作用;盐土中的土壤N,城市土地上的肥料/污水,以及农田中的混合物.
- 化因TDS而有所不同,而化因TDS升高而受到抑制,这两种情况都存在. 在PSIA的农业用地显示化抑制和较低的酸盐污染.
结论:
- 土地使用类型是沿海地区酸盐动态的关键决定因素.
- 水文条件,特别是TDS和海水入侵历史,显著影响循环过程,如化和脱化.
- 与MSIA相比,PSIA表现出独特的酸盐动态,其特点是内部积累和减少外部输入.
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