对于陆地生态系统中化的临界负载.
1Trent School of the Environment, Trent University, 1600 West Bank Dr., Peterborough, ON K9J 7B8, Canada.
The Science of the total environment
|March 27, 2024
概括
修改了临界负载模型,以解决性尘埃增加的问题,防止土壤基离子积累. 在工业来源附近发现了超标,突出显示了尽管酸沉积减少了,但化的风险.
科学领域:
- 环境化学环境化学
- 生态系统风险评估 生态系统风险评估
- 土壤科学 土壤科学
背景情况:
- 临界负荷已经成功地减少了全球的酸性沉积.
- 加拿大的硫氧化物 (SOx) 排放量下降,但总颗粒物 (TPM) 增加.
- 在TPM中的酸可以通过减少酸化来使生态系统受益,但在排放源附近会造成伤害.
研究的目的:
- 修改简单质量平衡 (SMB) 模型,以防止过度的基离子在土壤中的积累.
- 评估加拿大阿尔伯塔省工业排放源附近土壤化的风险.
主要方法:
- 修改了简单质量平衡 (SMB) 模型,包括基离子积累的上限.
- 将修改后的模型应用于阿尔伯塔省油砂地区的森林地区,分析土壤化学和沉积情况.
主要成果:
- 在研究地点的基离子漏明显高于背景水平.
- 化基离子的化超过了硫酸盐 (SO4) 和酸盐 (NO3) 的联合化.
- 在所有考虑的场景下,性化的临界负载都超过了.
结论:
- 修改后的临界负载框架有效地识别了性尘埃导致土壤化的风险.
- 工业来源附近的高基离子沉积可能导致不良的生态系统状态转变.
- 需要对基离子沉积,行为和长期土壤过程进行进一步的研究.
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