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Updated: Sep 24, 2025

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
Published on: February 5, 2022
Fe(ii) and Mn(ii) removal by Ca(ii)-manganite (γ-MnOOH)-modified red mud granules in water
Yingying Su1, Qi Zhu1, Jian Li1
1School of Chemistry and Materials Science, Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, Heilongjiang University China hdzhuqi@126.com xzphit@126.com cherry1999_0@163.com.
Abstract:
In this study, a material (DLRMG) was synthesized by modifying Ca2+ and manganite (γ-MnOOH) on red mud granules (RMG), which were the main raw materials derived from industrial alumina. Moreover, a series of experiments were conducted on the adsorption of Fe2+ and Mn2+ in underground water. The prepared samples were analyzed by X-ray diffraction (XRD), thermogravimetric analysis-differential thermal analysis (TG-DTA), zeta potential analysis, BET and scanning electron microscopy (SEM); the concentration of the effluent was found to be of acceptable standard after the treatment. DLRMG continued to treat fluoride wastewater even after the saturated adsorption of Fe2+ and Mn2+, and the results clearly showed that the treatment was effective. Overall, the problems of red mud stockpile and pollution in China would be effectively controlled by DLRMG.
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