Prof. Jang Min’s Research Team (Department of Environmental Engineering) Develops High-Efficiency...
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- 2021-11-10
- 2099
Prof. Jang Min’s Research Team (Department of Environmental Engineering) Develops High-Efficiency Material for Manganese Removal in Water
Professor Jang Min’s research team (Department of
Environmental Engineering), Jang Seok-Beom (first author) and research
professor Jong Cho-Eun (co-corresponding author), conducted a research project
with a magnesium hydroxide-coated medium (Flower like Magnesium Hydroxide
coated) in polyurethane that effectively removes manganese in water.
Polyurethane (hereinafter FMHP) was developed. The results were published in
the Journal of Hazardous Materials (IF: 10.588, JCR top 3.64%), a scientific
journal in the field of environment.
Manganese is the 12th
most abundant element in the earth's crust and exists mainly in the form of
ore. Long-term or high exposure to manganese can cause chronic manganese
poisoning and neurological damage such as Parkinson's disease.
Adsorption, which is
the most widely used among existing water treatment technologies, has
limitations such as low manganese selectivity and some ionized manganese
remaining. In addition, the removal of manganese through oxidation among widely
used technologies generates a large amount of sludge (sediment) and has a
disadvantage due to the cost of post-treatment. Therefore, it is inevitable to
develop a practical, simple, and high-efficiency technology for the treatment
of manganese.
When magnesium
hydroxide undergoes a hydrothermal synthesis process, related studies have been
actively carried out as the plate-shaped magnesium hydroxide forms a
flower-shaped three-dimensional structure with a maximized surface area due to
its own aggregation and electrostatic repulsion. In particular, research on
removing heavy metals by supporting magnesium hydroxide on the surface of
polyurethane has been continuously conducted.
Professor Jang Min’s
research team found that by supporting magnesium hydroxide on the surface of
polyurethane, the adsorbed manganese is oxidized rather than simply adsorbed to
dissolved manganese to form a manganese oxide layer. In this study, the effect
of the reaction between magnesium hydroxide and dissolved manganese and the
formed manganese oxide layer on the manganese removal ability was investigated
and confirmed.
Through the results
of this study, the treatment of dissolved manganese with polyurethane loaded
with magnesium hydroxide costs $0.062 million per ton of contaminated water,
proving that it is very economical and effective. It is expected to make a
significant contribution to improving health.
Meanwhile, this study was carried out with the support
of the National Research Foundation of Korea and the Korea Institute of Science
and Technology, and the research results were published online on September 20,
2021 in Journal of Hazardous materials (IF: 10.588), a scientific journal. (Paper
title: In-situ growth of manganese oxide on self-assembled 3D-magnesium
hydroxide coated on polyurethane: Catalytic oxidation mechanism and application
for Mn(II) removal)
■ Web link: https://doi.org/10.1016/j.jhazmat.2021.127267
Manufacturing and properties of magnesium hydroxide-supported polyurethane and the mechanism of manganese removal and in situ formation of manganese removal material by the material