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在中国,两个森林流域的重金属预算具有严重的大气沉积污染

Dongwei Lv¹, Dongxing Yang¹, Jiawei Zhang¹

¹State Key Laboratory of Regional Environment and Sustainability, School of Environment, Tsinghua University, Beijing 100084, China.

The Science of the total environment

|June 8, 2025

概括

中国的森林保留了重金属 (HMs),如,和,尽管大气沉积量减少. 这些金属正在通过土壤形状垂直迁移,但深层土壤继续充当有效的水槽,防止广泛出口.

科学领域:

环境科学环境科学
地质化学地质化学
森林生态森林生态

背景情况:

大气中的重金属 (HM) 沉积量在中国有所减少.
森林生态系统在HM循环和保留中发挥着作用.
了解HM迁移对于评估环境污染至关重要.

研究的目的:

研究 (Zn), (Pb) 和 (Cd) 通过中国森林的水文路径的迁移.
在降低大气沉积的条件下,量化针叶和宽叶森林中的HM流量.
评估森林地面垃圾和土壤在HM保留和垂直迁移中的作用.

主要方法:

监测两个森林地区 (TieShanping的针叶树,Gaozhuang的宽叶树) 的落和土壤中的HM流 (Zn,Pb,Cd).
通过垃圾层和土壤对HM保留的分析.
两种森林类型和地点之间的HM沉积和迁移模式的比较.

主要成果:

工业场所 (高庄) 的Pb和Cd的透落流量明显高于城市场所 (铁山平).
针叶树林表现出更强的空气中HM吸附,而宽叶沙由于分解速度更快,保留率较低.
土壤充当了HMs的有效沉器,在两种森林中都保留了90%以上,高庄的高pH土壤更有效.
观察到HMs在表面土壤中的垂直迁移,但深层土壤进一步保留了这些金属.

结论:

在大气沉积减少后,中国受污染的森林在土壤配置中呈现垂直HM迁移.
森林垃圾和土壤层对于保持HM至关重要,深层土壤防止流域规模的出口.
尽管沉积量减少,但持续的HM迁移需要持续监测森林土壤的健康状况.

关键词:

顶效应是天花板的影响.捕捞预算是一个捕捞预算.重金属减速减速是重金属中的一种.领导领导领导领导领导通过秋天通过秋天.

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