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Related Concept Videos

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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Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
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Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
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Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
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Using Microbial Aggregates to Entrap Aqueous Phosphorus.

Ying Xu1, Yonghong Wu2, Sofia Esquivel-Elizondo3

  • 1Zigui Ecological Station for Three Gorges Dam Project, State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 71 East Beijing Road, Nanjing 210008, China; College of Resource and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.

Trends in Biotechnology
|April 21, 2020
PubMed
Summary
This summary is machine-generated.

Microbial aggregates offer a sustainable strategy for removing excess phosphorus from the environment. Enhancing microalgae-bacteria interactions and employing genetic engineering can improve phosphorus capture in aquatic ecosystems.

Keywords:
extracellular/intracellular entrapmentintegrated processesinteractionmicrobial aggregatesphosphorus

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Area of Science:

  • Environmental science
  • Microbiology
  • Biotechnology

Background:

  • Phosphorus loss to the environment threatens aquatic ecosystems.
  • Microbial aggregates present a natural and sustainable solution for phosphorus removal.
  • Current methods focus on extracellular and intracellular entrapment mechanisms.

Purpose of the Study:

  • To explore microbial aggregate-based technologies for phosphorus removal.
  • To identify factors enhancing phosphorus removal efficiency within microbial aggregates.
  • To propose novel strategies for phosphorus reclamation using microbial aggregates.

Main Methods:

  • Review of existing literature on microbial aggregate functions in phosphorus removal.
  • Analysis of extracellular and intracellular phosphorus entrapment mechanisms.
  • Investigation of microalgae-bacteria interactions, quorum sensing, and acclimation effects.

Main Results:

  • Microbial aggregates effectively remove phosphorus through extra- and intra-cellular entrapment.
  • Microalgae-bacteria interactions, quorum sensing, and acclimation significantly enhance phosphorus removal.
  • Diverse intracellular mechanisms contribute to phosphorus sequestration.

Conclusions:

  • Microbial aggregates are a promising, eco-friendly technology for phosphorus reclamation.
  • Future advancements can be achieved through ecological and genetic engineering approaches.
  • Integrated processes involving microbial aggregates offer novel avenues for sustainable phosphorus management.