在贝区 (2015年和2022年) 的不同土地使用类型中的重金属的时空变化和来源分析
Pengwei Zhang1,2,3, Lanfang Hu1,2, Bo Gao3
1Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
Scientific reports
|July 2, 2024
概括
贝区土壤重金属污染在2015年至2022年间增加,特别是在绿带地区. 尽管局部有轻微污染,但总体重金属含量并不表明存在重大风险,已确定的来源范围从工业活动到交通.
科学领域:
- 环境科学 环境科学
- 城市生态城市生态学
- 土壤科学 土壤科学
背景情况:
- 土壤是城市生态系统的关键组成部分.
- 了解重金属污染对于城市环境健康至关重要.
研究的目的:
- 调查北区土壤的时空变化和重金属污染源.
- 分析不同土地使用类型的重金属污染.
主要方法:
- 从城市和郊区的60个点采集了土壤样本.
- 分析了2015年和2022年的重金属含量.
- 使用的单因素污染指数,污染负载指数 (PLI) 和地质积累指数 (I).
- 对各种重金属进行源分析.
主要成果:
- 2015年和2022年的重金属含量超过了背景水平,显示了7年来的积累.
- 与2015年相比,2022年绿地带和林地显示重金属含量增加.
- 污染集中在工业区,高度污染点的趋势正在下降.
- 索引表明没有显著的整体污染,只有轻微的局部污染.
结论:
- 贝区的城市土壤显示重金属积累的增加,特别是在绿色空间.
- 确定的来源包括化学,农业,自然,工业 (电,机械) 和与交通有关的活动.
- 结果为未来城市土壤重金属研究和污染管理战略提供了基础.
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