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[根据多种定性和定量统计分析方法确定地下水中的酸盐来源]
Yue Xi1,2, Su-Shi Xu1,2, Ji-Ji Chen1,2
1Beijing Municipal Ecological and Environmental Monitoring Center, Beijing 100048, China.
Huan jing ke xue= Huanjing kexue
|February 9, 2026
概括
地下水中的酸盐污染是一个重大问题. 土壤有机和化学肥料是主要来源,地下水位上升加剧了这个问题.
科学领域:
- 环境科学 环境科学
- 水文地质学 水文地质学
- 地质化学 地质化学
背景情况:
- 酸盐是普遍存在的地下水污染物,需要识别污染源以有效控制污染.
- 了解酸盐来源对于管理农业和城市化地区的地下水质量至关重要.
研究的目的:
- 确定和量化一个典型的北京平原地区的地下水中酸盐 (NO3-) 污染的来源.
- 评估包括土壤,肥料和污水在内的各种因素对地下水酸盐水平的贡献.
主要方法:
- 对水化指数进行定性分析.
- 稳定同位素在R (SIAR) 模型中的源分配.
- 绝对主要成分得分-多重线性回归 (APCS-MLR) 模型用于定量分析.
主要成果:
- 地下水的水化学是由HCO3-Ca·Mg类型主导的,HCO3-和Ca2+作为主要的离子,起源于岩石气候和人类活动.
- SIAR结果显示,土壤有机 (43.2%) 和化学肥料 (38.7%) 是主要的酸盐来源.
- 在APCS-MLR分析中,由于地下水位上升 (52.6%) 而导致的土壤出是酸盐度增加的主要驱动因素,其次是农业 (11.7%) 和生活非点源污染 (10.8%).
结论:
- 综合水化学分析,SIAR和APCS-MLR提供了强大而准确的方法来识别地下水酸盐来源.
- 土壤有机和肥料是地下水中酸盐的关键贡献者,土壤出由地下水位上升导致的土壤出而加剧.
- 有效地控制地下水污染需要解决农业做法,家庭污水和管理地下水位,以减轻酸盐污染.
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