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在巴基斯坦各地的田中存在低风险

Muhammad Wajahat Aslam¹, Bo Meng¹, Waqar Ali²

¹State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, PR China.

The Science of the total environment

|June 10, 2024

概括

巴基斯坦的水银污染.

科学领域:

环境科学环境科学
地质化学地质化学
污染研究污染研究

背景情况:

(Hg) 是一个全球性污染物. 了解其在巴基斯坦大米土壤中的来源和水平对于评估环境风险至关重要.
之前的假设表明巴基斯坦的高Hg污染,需要进行详细的调查.

研究的目的:

为了确定巴基斯坦大米土壤中的 (Hg) 度和同位素成分.
确定这些农业地区Hg污染的主要来源.

主要方法:

分析了巴基斯坦500个大米土壤样本中的总Hg (THg) 度.
使用Hg稳定同位素分析 (δ202Hg, Δ199Hg, Δ200Hg) 来区分Hg来源.
与土壤物理化学性质和接近工业/炉地点的相关Hg水平.

主要成果:

平均THg度为22.30 ± 21.74 ng/g,表明整体污染比预期的要低.
在炉和工业区附近发现了更高的THg水平,这表明局部点源.
同位素分析表明,污染地点的煤炭来自当地人为来源的燃烧.
未被污染的地点显示,通过湿Hg的沉积作为主要来源,通过远程跨境运输.

结论:

巴基斯坦大米土壤中的Hg污染通常很低.
煤炭燃烧和工业排放等当地人为活动是特定地区的重要来源.
远程大气传输也会导致未被污染的地区的沉积.

关键词:

Hg 的稳定同位素是 Hg 的稳定同位素.这里是大米土壤.巴基斯坦巴基斯坦巴基斯坦.南亚亚洲南亚亚洲跨境运输 Hg 运输

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