土壤湿度动态调节了被污染的土中的铜的释放率和可变性
Yijin Lv1, Jialiang Kuang1, Zecong Ding1
1The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, People's Republic of China.
The Science of the total environment
|November 15, 2023
概括
气候变化影响土壤水分,影响重金属的释放. 令人惊的是,土壤高湿度减少了铜的释放,微生物在封存金属和保护土壤方面发挥了关键作用.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 地质化学 地质化学
背景情况:
- 气候变化加剧了极端降雨和干旱,导致土壤水分的大幅波动.
- 了解土壤湿度动态对于预测重金属行为和环境风险至关重要.
研究的目的:
- 在不同湿度条件下,量化土中的铜释放率和不稳定分数.
- 研究土壤湿度动态对重金属可变性和释放性的影响.
主要方法:
- 结合实验化与动力模型.
- 分析了土壤固体和溶液成分.
- 研究了来自中国南部的两个土.
主要成果:
- 铜的释放率和可变性与土壤水分含量有很强的相关性.
- 高土壤湿度意外地降低了铜的释放率.
- 通过有机物质形成和土壤聚合,土壤微生物被确定为铜可变性的关键调节者.
结论:
- 土壤湿度动态显著影响重金属释放和土壤的可变性.
- 微生物活动在减轻重金属释放方面发挥着至关重要的作用.
- 将土壤湿度动态纳入环境模型对于准确的风险评估至关重要,特别是在受气候变化影响的土中.
相关概念视频
00:56Extraction: Advanced Methods
455
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
455
02:41Responses to Drought and Flooding
10.7K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.7K