A Nanomineral Material from Thermally Treated Low Grade Natural Rhodochrosite????(Open Access)

作者：Zhang, Changai; Qing, Chengsong; Chen, Tianhu^*; Liu, Haibo; Chen, Dong; Hu, Wei

来源：Earth Science / Diqiu Kexue, 2018, 43(5): 1670-1679.

DOI：10.3799/dqkx.2018.420

• Chemical method
• Copper ions
• Hausmannites
• Nano-porous materials
• Porous structures
• Removal efficiencies
• Rhodochrosite
• Temperature increase

A nanomineral material was prepared from thermally treated low grade natural rhodochrosite in this study. The composition of natural rhodochrosite was investigated by combining XRF, TEM and chemical method. The substance and structure after calcination were characterized by TG-MS, XRD, SEM, BET, and XPS. The results show that the mineral constituents of the rhodochrosite ore are rhodochrosite, quartz, pyrite and sulfate oxidized from pyrite. When the temperature increases to 550℃, the rhodochrosite calcines gradually, releasing a great amount of CO2, forming hausmannite and other species of MnOx. As a result, the porous structure (massive accumulation) occurs on the surface of rhodochrosite, which has the pore sizes in 3-7 nanometer, in particular, the maximum specific surface area is 31.5 m2/g. NH3-SCR results show that the sample R550 exhibited a high denitration performance. R550 also has a good removal efficiency of cadmium, lead and copper ions. It is indicated that the nano-porous material with better specific surface area can be prepared through calcining rhodochrosite ore at 550℃.

• 出版日期2018
• 单位合肥工业大学