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相关概念视频

The Phosphorus Cycle01:21

The Phosphorus Cycle

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Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
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Bioremediation

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Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
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相关实验视频

Updated: Jun 15, 2025

Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading
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外源性路径调节电子转移,增强沉积物固定,使不移动.

Lean Zhou1, Yuting Zeng1, Chong Xu1

  • 1Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China.

The Science of the total environment
|August 22, 2024
PubMed
概括
此摘要是机器生成的。

这项研究通过添加电极和氧化铁来增强沉积物生物修复,改善有机污染物的去除和稳定水平. 这一战略有效地减少了水生环境中的内源污染.

关键词:
封闭式电路 封闭式电路细胞外电子转移 细胞外电子转移铁氧化物 铁氧化物固化不动化的.沉积物沉积物是一种沉积物.

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The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations

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科学领域:

  • 环境科学 环境科学
  • 微生物学 微生物学
  • 环境工程 环境工程

背景情况:

  • 无氧沉积物缺乏电子受体,导致释放和低效的有机污染物去除.
  • 内源性污染对水生生态系统构成重大挑战.
  • 开发有效的生物修复策略对受污染的沉积物至关重要.

研究的目的:

  • 将电极和氧化铁引入沉积物中,以创建电子传输链.
  • 加强有机污染物的去除,减少内源释放.
  • 调查对微生物群落和固定的影响.

主要方法:

  • 在沉积物中添加和不添加铁 (Fe) 的闭合电路 (CC) 系统的建造.
  • 在84天内监测总有机碳 (TOC) 去除效率.
  • 分析表面和间隙水,沉积物中的度.
  • 使用16S rRNA测序进行微生物社区分析.

主要成果:

  • CC和CC-Fe系统的TOC移除效率分别是控制系统的1.4和1.7倍.
  • CC-Fe系统稳定了水面上的,并减少了30%的间歇水.
  • 红氧敏感在CC-Fe沉积物中增加了14%,表明强化固定.
  • 丰菌种群的CC-Fe显著增加,与改善的TOC去除相关.

结论:

  • 电极和氧化铁的联合使用是沉积物生物修复的有效策略.
  • 这种方法增强有机污染物的降解,并减轻内源释放.
  • 调节微生物群落和电子运输通路是成功生物修复和元素循环调节的关键.