Anoxic photogeochemical oxidation of manganese carbonate yields manganese oxide
نویسندگان
چکیده
منابع مشابه
Arsenite oxidation by a poorly-crystalline manganese oxide. 3. Arsenic and manganese desorption.
Arsenic (As) mobility in the environment is greatly affected by its oxidation state and the degree to which it is sorbed on metal oxide surfaces. Manganese oxides (Mn oxides) have the ability to decrease overall As mobility both by oxidizing toxic arsenite (As(III)) to less toxic arsenate (As(V)), and by sorbing As. However, the effect of competing ions on the mobility of As sorbed on Mn-oxide ...
متن کاملAcetone oxidation using ozone on manganese oxide catalysts.
Supported manganese oxide catalysts were prepared by the impregnation of alumina foam blocks washcoated with alumina and silica. The manganese content based on the weight of the washcoats was 10 wt % calculated as MnO2. Fourier transform profiles of the Mn K-edge EXAFS spectra for these samples gave three distinctive peaks at 0.15, 0.25, and 0.32 nm and were close to the profiles of Mn3O4 and b...
متن کاملUsing nickel manganese oxide catalysts for efficient water oxidation.
Nickel-manganese oxides with variable Ni : Mn ratios, synthesised from heterobimetallic single-source precursors, turned out to be efficient water oxidation catalysts. They were subjected to oxidant-driven, photo- and electro-catalytic water oxidation showing superior activity and remarkable stability. In addition, a structure-activity relation could be established.
متن کاملDielectric Studies Of Manganese Carbonate Nanocrystals
Over the past few years, the synthesis and characterization of nanocrystals of materials have become an area of intense research activity. MnCO3 (Manganese Carbonate) is a well known semi conducting material and is highly useful in electronic and optical devices. In the present study, we have made an attempt to prepare MnCO3 (with two different ratios of preparation) with simple domestic microw...
متن کاملThe Smelting of Manganese Carbonate Ore
The practice of manganese ferroalloy smelting has traditionally been based on utilising oxide ores which typically contain a high level of manganese. This preference for oxides has even been extended to the modification of natural carbonates into nodulized oxides. However smelting practices developed over the past 30 years have created a market for natural manganese carbonate ores, driven in pa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2020
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.2002175117