Results 11 to 20 of about 728 (154)
Journal of Economic Geology, 2022 The Kal-Baneh Mn deposit is located 56 km northwest of Jiroft city in the southeast of the Sanandaj-Sirjan Zone. The ore mineralization occurs as layered, banded, massive, and disseminated textures within radiolarian cherts of the upper parts of the ...
Mohammad Hossein Sedghi Deh Ziyari +1 more
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MINERAL FORMS OF PHOSPHORUS IN OOIDAL IRON ORES OF THE MARSYATY DEPOSIT (NORTHERN URALS) [PDF]
МинералогияHorizons enriched in phosphorus are identified in ooidal ironstones underlying the oxidecarbonate manganese ores of the Marsyaty deposit (Northern Urals). The maximum P2O5 content reaches 6.37 wt. % in a quartz sandstone interbed with ooids consisting of
E.V. Belogub +4 more
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Sorption extraction of and radionuclides from aqueous solutions by MnO(OH) nanoparticles
Adsorption Science & Technology, 2017 In this study, nano-sized particles of manganese oxyhydroxide (MnO(OH)) are synthesized. Sorption properties of this material towards 90 Sr and 137 Cs radionuclides in the pH range from 2 to 9 at a temperature of 293.15 K solution are studied.
AP Krasnopyorova +5 more
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Frontiers in Marine Science, 2020 Hydrothermal vents are a recognized source of trace elements to the ocean inventory. Nevertheless, the contribution of slow-spreading ridges remains poorly resolved.
David González-Santana +11 more
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Cerâmica, 2008 Óxido hidróxido de manganês (γ - MnOOH) do tipo da manganita foi sintetizado por uma rota simples, em que a chave precursora K-birnessita foi preparada pelo método sol-gel. O tratamento hidrotermal da estrutura lamelar do tipo da birnessita favorece
B. A. M. Figueira +2 more
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Permeability and mechanical properties of cement mortars colored by nano-mineral additives
MATEC Web of Conferences, 2012 This work concerns a preliminary study on issues that relate primarily to the permeability of cementitious materials under the influence of some specific inexpensive additions that can play an important role in preserving the environment.
Kamali Bernard S. +3 more
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Iron and Manganese Biogeochemistry in Forested Coal Mine Spoil
Soil Systems, 2019 Abandoned mine lands continue to serve as non-point sources of acid and metal contamination to water bodies long after mining operations have ended. Although soils formed from abandoned mine spoil can support forest vegetation, as observed throughout the
Elizabeth Herndon +3 more
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Heritage Science, 2019 Many Middle Stone Age sites in South Africa yielded hundreds, even thousands, of ochre pieces sometimes showing use traces. Less attention has been paid to the tools used for their processing. Here, seven tools excavated from the oldest layers (71,000 to
Marine Wojcieszak, Lyn Wadley
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Intrinsic Phonons as a Dynamic Control Knob for Catalytic Reactivity in 2D Materials
Advanced Science, EarlyView.Intrinsic phonon excitations are demonstrated to serve as a dynamic control knob for catalytic reactivity in 2D materials. Mode‐selective lattice vibrations reconstruct the electronic structure, lower oxygen evolution reaction barriers, establishing a phonon‐engineering paradigm for dynamically regulating electrocatalysis beyond conventional static ...
Kai Ren +5 more
wiley +1 more source
Enhanced arsenic removal by biochar modified with nickel (Ni) and manganese (Mn) oxyhydroxides [PDF]
Journal of Industrial and Engineering Chemistry, 2016 Abstract Two biochar composites were synthesized by either pyrolysis of Ni/Mn oxide-modified pinewood feedstock (NMMF) or precipitation of Ni/Mn-LDHs onto pristine biochars (NMMB). Both sorbents were characterized and results indicated that NiO and MnO were dominant crystals in NMMF, whereas Ni/Mn-LDHs in NMMB.
Shengsen Wang, Bin Gao, Yuncong Li
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