床基板影响了地下流动建造湿地中的叶子垃圾分解率和浸出溶解有机物质量
Mercedes Guerrero-Brotons1, Rosa Gómez1, Anna M Romaní2
1Department of Ecology and Hydrology, University of Murcia, 30100 Murcia, Spain.
The Science of the total environment
|March 14, 2025
概括
将土壤添加到建造的湿地石床上可以增强叶子垃圾的分解和微生物活动,改善处理富含酸盐的废水的碳供应. 生物炭抑制了分解,而土壤提供了最好的结果.
科学领域:
- 环境科学 环境科学
- 废水处理工程 废水处理工程
- 微生物生态学 微生物生态学
背景情况:
- 建筑湿地 (CWs) 需要可变碳 (C) 来处理富含酸盐,C限制的废水.
- 地下流量CW利用床基板和植被作为主要的C来源.
- 分解植物垃圾释放C和营养物质,提高CW的性能.
研究的目的:
- 分析不同床基板 (石,石+土壤,石+生物炭) 对叶子垃圾分解率的影响.
- 评估来自各种基板的叶子液的化学质量和微生物吸收.
- 确定最佳的CW基板,通过植物分解促进不稳定的C供应.
主要方法:
- 实验设计比较只有石,石+土壤和石+生物炭基质.
- 在不同的基质条件下测量叶子的分解速度.
- 分析植物垃圾中浸碳的化学成分和微生物吸收.
主要成果:
- 在基板之间,分解速度差异很大,受环境条件的影响,而不是叶子的化学成分.
- 光降解在石床中的分解占主导地位;微生物活动是土壤添加的关键.
- 生物炭添加抑制了分解,而土壤和生物炭液由于营养含量而显示出更高的微生物吸收率.
结论:
- 将天然土壤添加到石基板上是通过在CW中的植物分解来增强不稳定的C供应的最有效方法.
- 保留CW表面上的叶子垃圾的管理策略可以显著提高溶解有机碳 (DOC) 的可用性.
- 优化CW基板可以减轻处理农业排水中的不稳定C限制.
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