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融化永久土的活跃土壤层是对水资源关注的有机物质的新兴来源

Min Han^1,2,3, Biao Jin^1,2,3, Hans Peter H Arp^4,5

¹State Key Laboratory of Advanced Environmental Technology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China.

Environmental science & technology letters

|May 19, 2025

概括

西藏高原的永久土融化会将持久性,移动性和有毒物质 (PMT) 释放到淡水源中. 我们的研究确定了这些有害化合物,突出了饮用水和地下水质量的风险.

科学领域:

环境科学环境科学
地质化学地质化学
水文学的水文学

背景情况:

西藏高原是数十亿人的重要淡水来源.
气候变化正在加速永久土的退化,释放出古老的有机物质.
动员物质存在风险,如果它们是持久的,移动的和有毒的 (PMT) 或非常持久和非常移动的 (vPvM).

研究的目的:

识别和评估永久土活性层土壤中的PMT/vPvM物质.
评估永久土融化对水资源的潜在威胁.

主要方法:

对21份关于永久土中检测到有机化合物的文献综述.
应用PMT/vPvM标准的标准评估方案.
使用机器学习模型来帮助物质识别.

主要成果:

在永久土活性层土壤中检测到的有机化合物的34%被归类为PMT/vPvM物质.
这些已识别的物质来源于合成,天然或未确定的来源.
这些发现表明,持续的永久土融化对水质构成重大风险.

结论:

关于PMT/vPvM物质水平的永久土降解释放.
优先考虑研究和减缓战略对于保护水资源至关重要.
了解这些物质的起源和命运对于环境管理至关重要.

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