矿在循环再堆叠混合构造湿地:电子转移用于酸盐的减少和固定
Jingmiao Fu1, Yaqian Zhao2, Yunv Dai3
1State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an, 710048, PR China; Department of Ecology, Engineering Research Center for Tropical and Subtropical Aquatic Ecological Engineering, Ministry of Education, Jinan University, Guangzhou, 510632, PR China.
Journal of environmental management
|December 31, 2024
概括
矿通过增加基质沉积和促进自脱来增强建筑湿地 (CW) 中的和去除. 这项研究揭示了pyrite.
科学领域:
- 环境科学 环境科学
- 环境工程 环境工程
- 地质化学 地质化学
背景情况:
- 建筑湿地 (CWs) 在废水处理方面是有效的.
- 石是一种环保基质,但其用于循环堆叠混合构建湿地 (RSHCWs) 的应用尚未得到充分研究.
- 了解基于pyrite的RSHCW中的营养去除机制至关重要.
研究的目的:
- 调查不同数量的矿对RSHCW中 (N) 和 (P) 除去的影响.
- 探索受矿和循环再循环影响的营养物质去除的潜在机制.
- 评估矿在改变微环境 (DO,pH) 和微生物活动中的作用.
主要方法:
- 使用RSHCW以不同比例的矿作为基板.
- 对总 (TP) 和总 (TN) 清除率进行分析的废水.
- 测量了溶解氧 (DO),pH和电子转移系统活性 (ETSA).
- 研究了微生物社区的转变和功能基因相互作用.
主要成果:
- 增加的化物比例使得TP的去除率从25%提高到58%,主要是通过Fe-P沉积.
- 即使没有外部碳源,也增加了20%的TN去除,这归因于以矿驱动的自无化.
- 添加皮里特增加了6.14倍的ETSA,促进了硫铁电子循环.
- RSHCW循环调节了pH值,丰富了特定的微生物,增强了微生物社区的协调.
结论:
- 矿显著提高了RSHCW中的N和P去除效率.
- 化石作为一个P储库,促进了自性脱.
- 硫铁电子循环和微生物社区调制是增强营养去除的关键机制.
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