Related Experiment Video
Updated: Jul 1, 2026
07:30
Fast Pyrolysis of Biomass Residues in a Twin-screw Mixing Reactor
Published on: September 9, 2016
27.6K
Advances in Phosphogypsum Calcination and Decomposition Processes in Circulating Fluidized Beds
Pengxing Yuan1, Meng Li2,3, Shiyi Chen1
1Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 211189, China.
ACS Omega
|September 30, 2024
Summary
Phosphogypsum (PG) waste can be repurposed by recovering valuable calcium and sulfur. This research proposes a pathway for its resourceful recovery, aiming for industrial application within 15 years.
Area of Science:
- Environmental Science
- Chemical Engineering
- Materials Science
Background:
- Phosphogypsum (PG) is a hazardous industrial waste from phosphoric acid production, posing environmental risks.
- Effective management and cleaner production strategies for PG are crucial for human-nature symbiosis.
- Current disposal methods threaten ecosystems, necessitating innovative solutions.
Purpose of the Study:
- To comprehensively review the utilization status of phosphogypsum.
- To propose a feasible pathway for the resourceful recovery and utilization of PG.
- To analyze challenges and countermeasures for PG calcination and decomposition.
Main Methods:
- Bibliometric visualization analysis to identify research trends.
- Review of phosphogypsum utilization status.
- Analysis of challenges in high-temperature calcination and decomposition processes.
Main Results:
- The most suitable solution for large-scale PG application involves recovering calcium (CaO) and sulfur (SO2).
- Copreparation of calcium-based materials and sulfuric acid from PG is a viable recovery pathway.
- Five key challenges hinder commercial promotion: mechanism, strengthening, value-added routes, scale-up, and assessment.
Conclusions:
- Resourceful recovery of PG, particularly through calcium and sulfur extraction, offers a promising solution.
- Addressing identified challenges is essential for the commercialization of PG calcination and decomposition.
- Industrial applications of PG recovery technologies are anticipated within 10-15 years.
Related Concept Videos
01:19Acid Mine Drainage
Mining activities that disturb sulfide-rich rocks, particularly those containing pyrite (FeS₂), initiate a cascade of geochemical and microbiological processes with serious environmental implications. When exposed to air and water, pyrite undergoes oxidation, releasing sulfate, ultimately forming sulfuric acid and mobilizing heavy metals into surrounding water systems. This phenomenon, known as acid mine drainage (AMD), results in low pH waters laden with toxic elements that threaten aquatic...
01:30Biological Treatment of Effluent and Waste Water
Biological wastewater treatment relies on the metabolic activity of microorganisms to remove pollutants from sewage. In modern treatment systems, this process is organized into sequential stages that progressively reduce solid material, dissolved organic matter, and microbial contamination. Each stage plays a distinct role in improving water quality and preparing the effluent for safe discharge or reuse.Primary and Secondary TreatmentPrimary treatment is a physical process that removes large...