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The Phosphorus Cycle

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.

Phosphorylation

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...

Roles of Electrolytes: Calcium and Phosphate

Roles of Electrolytes: Calcium and Phosphate

Calcium and phosphate are essential electrolytes in the human body, with calcium being the most abundant mineral. Around 99% of the body's calcium is stored in the skeleton and teeth, forming a crystal lattice of mineral salts in combination with phosphates. Calcium plays crucial roles in various bodily functions such as blood clotting, neurotransmitter release, muscle tone maintenance, and nervous and muscle tissue excitability.
The calcium concentration in blood plasma is primarily...

Factors Affecting Solubility

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:

Protein Kinases and Phosphatases

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...

Microbial Bioremediation of Uranium

Microbial Bioremediation of Uranium

Microorganisms play a critical role in the transformation and immobilization of uranium in contaminated environments through four main pathways: bioreduction, biosorption, bioaccumulation, and biomineralization. These mechanisms reduce uranium’s toxicity and prevent its migration through groundwater systems, offering sustainable approaches for in situ bioremediation.Bioreduction of UraniumBioreduction is driven by anaerobic bacteria such as certain strains of Geobacter and Shewanella,...

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Related Experiment Video

Updated: Mar 20, 2026

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

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

Published on: May 18, 2018

Total Value of Phosphorus Recovery.

Brooke K Mayer¹, Lawrence A Baker², Treavor H Boyer³

¹Department of Civil, Construction and Environmental Engineering, Marquette University , Milwaukee, Wisconsin 53233, United States.

Environmental Science & Technology

|May 24, 2016

Summary

This summary is machine-generated.

Recovering phosphorus (P) from waste streams offers significant value beyond P products, including energy, water, and environmental benefits. Implementing P recovery is crucial for resource security and sustainability.

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Last Updated: Mar 20, 2026

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

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

Published on: May 18, 2018

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

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High-Throughput Measurement and Classification of Organic P in Environmental Samples

High-Throughput Measurement and Classification of Organic P in Environmental Samples

Published on: June 8, 2011

Area of Science:

Environmental Science
Resource Management
Agricultural Science

Background:

Phosphorus (P) is a vital, nonrenewable resource for global food production.
Excess P in the environment causes eutrophication.
Current P recovery is limited due to the low cost of mined P.

Purpose of the Study:

To provide a comprehensive overview of the total value of recovering P from waste streams.
To highlight the multifaceted benefits of P recovery.
To discuss strategies for implementing P recovery.

Main Methods:

Literature review and synthesis of existing data on P recovery.
Analysis of co-recovered resources (energy, nitrogen, metals, water).
Evaluation of environmental and societal benefits.

Main Results:

P recovery offers value beyond P products, including energy, nitrogen, metals, minerals, and water.
P recovery protects environmental quality and improves waste treatment efficiency.
P recovery enhances food security and social equity.

Conclusions:

Accounting for total value incentivizes P recovery.
Addressing business models, bottlenecks, and policy is essential for widespread P recovery.
Sustainable P management requires integrated recovery and reuse strategies.