功能性微生物丰富和化增强的从海洋沉积物释放:朝着可持续的管理
Fengyi Zhu1, Frederico Marques Penha2, Zeynep Cetecioglu1
1Department of Industrial Biotechnology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-114 21 Stockholm, Sweden.
Water research
|October 27, 2025
概括
这项研究通过结合聚酸盐积聚生物 (PAO) 和乙烯基二胺四酸 (EDTA) 来增强海洋沉积物中的 (P) 恢复. 这种新的方法显著增加了P的释放,并促进了营养循环的有效P回收.
科学领域:
- 环境科学 环境科学
- 生物地质化学生物地质化学
- 微生物生态学 微生物生态学
背景情况:
- 海洋沉积物作为重要的沉积物.
- 有效的 (P) 恢复对于关闭P循环和减轻轻缩至关重要.
- 现有的从沉积物中释放P的方法在效率上有局限性.
研究的目的:
- 开发和评估一种用于增强 (P) 释放和从海洋沉积物中恢复的新战略.
- 研究生物注射与聚酸盐积聚生物 (PAO) 和使用化剂的化学增强的联合效应.
- 为了优化P回收通过增强释放后降水.
主要方法:
- 两阶段的实验包括无氧批量测试和食批量操作.
- 对化剂 (酸盐,乙烯基胺三酸 (EDTA)) 对于P的释放进行评估.
- 用PAO适应沉积物和交替的无氧-有氧条件进行生物增强.
- 超基因组分析以确定微生物社区的转移.
- PHREEQC模拟和实验室实验用于P降水.
主要成果:
- EDTA显著增强了P的释放,在第一阶段达到48.5%.
- 综合方法 (PAO + EDTA) 达到83.4%的总P释放效率,可溶性P的145.9 mg/L.
- PAO的相对丰度从12.9%增加到65.0%,其中Candidatus Accumulibacter被选择性丰富.
- 对于可溶性P的回收,特别是与Fe结合的P,达到98.8%的最大降水效率.
结论:
- 联合的生物增强和化学增强策略对于从海洋沉积物中释放P是非常有效的.
- EDTA在环境过中发挥着关键作用,促进PAO的丰富和增强P的释放.
- 这种综合方法为水生系统中P回收和营养循环的关闭提供了一个有希望的解决方案.
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