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Related Concept Videos

The Phosphorus Cycle01:21

The Phosphorus Cycle

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.
Phosphorylation01:02

Phosphorylation

The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
Phosphorylation01:02

Phosphorylation

The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
Protein Kinases and Phosphatases02:54

Protein Kinases and Phosphatases

Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Glycolysis: Pay-off Phase01:25

Glycolysis: Pay-off Phase

So far, glycolysis has cost the cell two ATP molecules and produced two small, three-carbon sugar molecules. These molecules will proceed through the second half of the pathway, and sufficient energy will be extracted to pay back the two ATP molecules used as an initial investment and produce a profit for the cell of two additional ATP molecules and two even higher-energy NADH molecules.
Step 1 - 5: Glycolysis Preparatory Phase
The first phase of glycolysis has 5 steps where the glucose is...
Factors Affecting Solubility04:01

Factors Affecting Solubility

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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Updated: Jun 3, 2026

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
06:42

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Published on: July 22, 2019

Capturing the lost phosphorus.

Bruce E Rittmann1, Brooke Mayer, Paul Westerhoff

  • 1Swette Center for Environmental Biotechnology, Biodesign Institute at Arizona State University, PO Box 875701, Tempe, AZ 85287-5701, USA. Rittmann@asu.edu

Chemosphere
|March 8, 2011
PubMed
Summary
This summary is machine-generated.

Phosphorus (P) recovery from animal waste is crucial as minable reserves deplete. This review focuses on P-capture technologies, particularly transforming organic P into phosphate for easier recovery from agricultural waste streams.

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Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading
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Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method
08:21

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method

Published on: May 18, 2018

Area of Science:

  • Environmental Science
  • Agricultural Engineering
  • Chemical Engineering

Background:

  • Depleting minable phosphorus (P) reserves necessitate P recovery from agricultural waste.
  • Agricultural runoff and animal wastes represent major P loss pathways, impacting water quality.
  • Recovering P from animal waste is more technically and economically feasible than from runoff.

Purpose of the Study:

  • To review promising phosphorus (P) capture technologies for agricultural animal wastes.
  • To highlight methods for transforming organic P into inorganic phosphate for recovery.
  • To assess P recovery approaches from high-strength animal wastes.

Main Methods:

  • Anaerobic treatment of animal waste to convert organic matter to biogas (CH(4), H(2)) or electricity, releasing P as phosphate.
  • Phosphate capture via precipitation as magnesium or calcium solids.
  • Phosphate capture via adsorption to iron-based adsorbents.
  • Phosphate capture via ion exchange to phosphate-selective solids.
  • Phosphate capture via uptake by photosynthetic microorganisms or P-selective proteins.

Main Results:

  • Anaerobic treatment effectively releases P as phosphate from organic matter in animal waste.
  • Four main approaches exist for capturing phosphate: precipitation, adsorption, ion exchange, and biological uptake.
  • Precipitation as magnesium or calcium solids is the most developed method, while others show promise.

Conclusions:

  • Phosphorus (P) recovery from animal waste is a viable strategy to supplement dwindling minable P reserves.
  • Integrated anaerobic treatment and P-capture technologies offer a dual benefit of waste treatment and resource recovery.
  • Further development of adsorption, ion exchange, and biological methods could enhance P recovery efficiency and economic feasibility.