An innovative method for manganese (Mn2+) and ammonia nitrogen (NH4+-N) stabilization/solidification in electrolytic manganese residue by basic burning raw material

Shu, Jiancheng; Li, Bing; Chen, Mengjun; Sun, Danyang; Liang, Wei; Wang, Yao; Wang, Jianyi

doi:10.1016/j.chemosphere.2020.126896

Cited by 44 publications

(6 citation statements)

References 45 publications

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“…The second characteristic peak is hemihydrate gypsum (CaSO 4 -(H 2 O) 0.5 ), which is mainly formed by the reaction of CaMn(CO 3 ) 2 and CaCO 3 in manganese carbonate ore with H 2 SO 4 . In addition, a small amount of Pyrite, illite, albite, and dolomite are also found in the manganese slag, which is consistent with the existing literature [ 20 , 21 , 22 ].…”

Section: Experimental Studysupporting

confidence: 91%

Analysis of Basic Physical and Chemical Characteristics of Manganese Slag before and after Solidification and Its Feasibility as Highway Slope

et al. 2021

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Manganese slag is a kind of industrial waste produced by electrolytic production of manganese metal. The traditional method of stacking manganese slag not only causes waste of resources, but also produces environmental pollution. Finding harmless, effective, and economical disposal technology of manganese slag has gradually become a research hotspot and difficulty in the field of electrolytic manganese industry and environmental protection. To verify the feasibility of using manganese slag as roadbed material, the basic physical and chemical properties of manganese slag were analyzed based on X-ray diffraction, X-ray fluorescence spectrum, SEM scanning electron microscope, and particle analysis, the basic engineering characteristics of raw materials of manganese slag and solidified manganese slag mixed with quicklime were analyzed through a compaction test and a CBR test. Finally, based on the Monte Carlo method, the stability of a highway slope in the Guizhou Province of China is simulated by the finite element method, considering the spatial variability of manganese slag material strength parameters. The results show that the solidified manganese slag material can be used as highway subgrade material. This study has important reference significance for manganese slag highway construction projects.

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Section: Experimental Studysupporting

confidence: 91%

Analysis of Basic Physical and Chemical Characteristics of Manganese Slag before and after Solidification and Its Feasibility as Highway Slope

et al. 2021

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“…EMMW containing low concentrations of Mn 2+ and NH 4 + -N will cause harm to human production, life and physical health. [6][7][8] How to deal with low concentrations of Mn 2+ and NH 4 + -N from EMMW is an urgent problem for electrolytic manganese enterprises. Mn 2+ and NH 4 + -N can be removed by catalytic oxidation, chemical oxidation, physicochemical adsorption, breaking point chlorination, membrane treatment, biophysical methods, electrochemical, chemical precipitation and stripping methods.…”

Section: Introductionmentioning

confidence: 99%

“…EMMW containing low concentrations of Mn 2+ and NH 4 + –N will cause harm to human production, life and physical health. 6–8 How to deal with low concentrations of Mn 2+ and NH 4 + –N from EMMW is an urgent problem for electrolytic manganese enterprises.…”

Section: Introductionmentioning

confidence: 99%

Adsorption removal of Mn²⁺ and NH₄⁺–N from electrolytic manganese metal wastewater by modified phosphate ore flotation tailings

Shu

Cao

et al. 2023

Environ. Sci.: Water Res. Technol.

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“…The large amount of energy consumed in the process of sulfur removal by high-temperature calcination of electrolytic manganese slag can be used as the condition of the melting stage. Based on the above analysis, the smelting process can be considered to prepare glass ceramics with electrolytic manganese slag as raw material and solidified heavy metal elements to achieve harmless treatment ( Shu et al, 2020 ; Sun et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

A study of the solidification and stability mechanisms of heavy metals in electrolytic manganese slag-based glass-ceramics

et al. 2022

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To better solve the waste pollution problem generated by the electrolytic manganese industry, electrolytic manganese slag as the main raw material, chromium iron slag, and pure chemical reagents containing heavy metal elements mixed with electrolytic manganese slag doping. A parent glass was formed by melting the slag mixture at 1,250°C, which was, thereafter, heat-treated at 900°C to obtain the glass-ceramic. The results from characterizations showed that the heavy metal elements in the glass-ceramic system were well solidified and isolated, with a leakage concentration at a relatively low level. After crystallization, the curing rates of harmful heavy metals all exceed 99.9%. The mechanisms of heavy metal migration, transformation, and solidification/isolation in glass-ceramic curing bodies were investigated by using characterization methods such as chemical elemental morphological analysis, transmission electron microscopy, and electron microprobe. The most toxic Cr and Mn elements were found to be mainly kept in their residual state in the glass-ceramic system. It was concluded that the curing mechanism of the heavy metals in a glass-ceramic can either be explained by the chemical curing induced by bonding (or interaction) during phase formation, or by physical encapsulation. Characterization by using both Transmission electron microscopy and EPMA confirmed that Cr and Mn were mainly present in the newly formed spinel phase, while the diopside phase contained a small amount of Mn. Zn, Cd, and Pb are not found to be concentrated and uniformly dispersed in the system, which is speculated to be physical coating and curing.

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An innovative method for manganese (Mn2+) and ammonia nitrogen (NH4+-N) stabilization/solidification in electrolytic manganese residue by basic burning raw material

Cited by 44 publications

References 45 publications

Analysis of Basic Physical and Chemical Characteristics of Manganese Slag before and after Solidification and Its Feasibility as Highway Slope

Analysis of Basic Physical and Chemical Characteristics of Manganese Slag before and after Solidification and Its Feasibility as Highway Slope

Adsorption removal of Mn²⁺ and NH₄⁺–N from electrolytic manganese metal wastewater by modified phosphate ore flotation tailings

A study of the solidification and stability mechanisms of heavy metals in electrolytic manganese slag-based glass-ceramics

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An innovative method for manganese (Mn2+) and ammonia nitrogen (NH4+-N) stabilization/solidification in electrolytic manganese residue by basic burning raw material

Cited by 44 publications

References 45 publications

Analysis of Basic Physical and Chemical Characteristics of Manganese Slag before and after Solidification and Its Feasibility as Highway Slope

Analysis of Basic Physical and Chemical Characteristics of Manganese Slag before and after Solidification and Its Feasibility as Highway Slope

Adsorption removal of Mn2+ and NH4+–N from electrolytic manganese metal wastewater by modified phosphate ore flotation tailings

A study of the solidification and stability mechanisms of heavy metals in electrolytic manganese slag-based glass-ceramics

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Adsorption removal of Mn²⁺ and NH₄⁺–N from electrolytic manganese metal wastewater by modified phosphate ore flotation tailings