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从CCA处理的木材中扩散潜在的有毒元素到巴西的土和沙土中

Angelita Ribeiro¹, Barbara Kroetz¹, Letícia Alana Bertoldo¹

¹Chemistry Department, Universidade Estadual de Londrina, Rod. Celso Garcia Cid-PR445, Londrina, Parana, 86051-990, Brazil.

Journal of hazardous materials

|June 20, 2025

概括

经过化铜酸盐 (CCA) 处理的木材释放土壤污染物. 在粘土土中,CCA的泄漏率更高, (VI) 显示出最多的流动性,构成环境污染风险.

科学领域:

环境科学环境科学
土壤科学土壤科学
树木保护树木保护

背景情况:

经过铜酸盐 (CCA) 处理的木材是一种广泛使用的材料,但可以将潜在有毒元素 (PTEs) 浸出到环境中.
了解CCA成分 (,铜,) 从经过处理的木材中扩散到各种土壤类型中的扩散动态对于评估环境风险至关重要.

研究的目的:

调查CCA处理的木材 (松树和树) 中的As,Cu和Cr ions的浸出行为和扩散率到粘土和沙土中.
评估这些PTE在不同土壤条件下的移动性,并探索潜在的物种相互转换.

主要方法:

利用平面源扩散方法量化CCA处理木材的离子浸出到土壤样本中的数量.
采用高斯适配来确定扩散系数和极地图来分析多方向离子流动性.
在中进行试点实验,模拟CCA在和水的土壤条件下扩散.

主要成果:

扩散系数是10-12m2s-1的程度. 在这两种土壤类型中,Cr(VI) 具有最高的流动性,其次是As(V) 和Cu(II).
试点实验表明Cu (II) 具有最高的流动性,其次是Cr (III/VI) 和As (V),可能是由于Cr (III/VI) 的相互转换.
在粘土土壤中,与沙土相比,CCA出显著更为明显,这突显了土壤特性的影响.

结论:

经过CCA处理的木材存在严重的土壤污染风险,原因是PTE的扩散,特别是在粘土土壤中.
物种的相互转换可以增强PTE的移动性和毒性,影响环境健康.
这些发现需要对巴西现有的环境法规进行审查,并鼓励开发环保的木材处理替代品.

关键词:

在CCA CCA中,你会发现.化铜酸盐化铜酸盐扩散系数扩散系数土壤土壤土壤.经过处理的木材.

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