揭示主要土壤元素在交通网络可访问性沿线行为的空间差异化驱动因素
Siyu Wang1, Zhunan Xiong1, Xiaoxiao Han1
1Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China.
Environmental pollution (Barking, Essex : 1987)
|December 4, 2023
概括
交通便利性对城市地区的土壤金属污染有重大影响. 更高的可访问性与 (Cd) 和 (Hg) 等有毒元素的增加相关,这是城市化和工业活动所推动的.
科学领域:
- 环境科学 环境科学
- 城市生态城市生态学
- 地质化学 地质化学
背景情况:
- 城市化改变了土地使用,加快了社会经济流动,挑战了传统的城市化梯度.
- 交通网络的可访问性是城市发展的关键指标,并影响环境条件.
- 在全球和中国,人们越来越担心城市土壤中的金属污染.
研究的目的:
- 调查表面土壤中有毒和微量金属元素的驱动因素.
- 分析城市化,土壤特性和地形对金属分布的影响.
- 评估不同交通便利程度如何影响北京-天津-河北城市聚合区的土壤金属度.
主要方法:
- 利用地理探测器分析来识别驱动力.
- 采用单因素污染指数和莫兰指数用于污染评估和空间分析.
- 收集并分析了表面土壤样本 (0-20厘米),以检测重金属和微量元素度.
主要成果:
- 可访问性显著影响 (Cd) 和 (Hg) 水平,在更容易进入的地区度更高.
- (Cd) 和 (V) 的污染超标率最高 (93.18%和75.76%).
- 观察到元素的空间聚类,在高可访问性区域有热点,这表明城市化在聚合模式中的作用.
结论:
- 城市化加剧了土壤对有毒元素的污染,特别是在交通方便的地区.
- 微量元素 (Mn,Ti,V) 越来越多地受到城市化和自然过程的影响.
- 调查结果强调了在快速城市化地区需要有针对性的环境管理战略.
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