Critical Review on Recycling of Erdite/KFeS2 Rods from Waste Sludge as Environmental Functional Materials
Document Type
Article
Publication Date
10-2025
Department
College of Forest Resources and Environmental Science
Abstract
The ternary compounds such as erdite (NaFeS2‧2H2O) and potassium thioferrite (KFeS2) are attracting some interests from scientific communities due to their potential applicability in environmental protection. Such compounds were synthesized by using chemical-pure reagents and/or waste Fe-rich sludge, via alkaline hydrothermal route, and also developed from lab- to pilot-scale at the relative low temperature of 80 °C under atmosphere condition. In this paper, the hydrothermal synthesis of two crystals was reviewed, in consideration of the parameters, e.g., OH−/HS− dosage, impurities, temperature, and Na+/K+. According, a newly process was explained for the radial growth of (FeS2)nn− chain and cleavage as rods. The spontaneous hydrolysis and/or decomposition of erdite and/or KFeS2 crystal in water solution was also discussed, along with their potential application in environmental pollution control.
Publication Title
Water Air and Soil Pollution
Recommended Citation
Chen, Y.,
Yang, J.,
Liang, D.,
Zhang, Y.,
Sun, T.,
Yang, W.,
Zhu, S.,
Xie, X.,
&
Jadambaa, T.
(2025).
Critical Review on Recycling of Erdite/KFeS2 Rods from Waste Sludge as Environmental Functional Materials.
Water Air and Soil Pollution,
236(13).
http://doi.org/10.1007/s11270-025-08547-1
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p2/2058