Results 81 to 90 of about 235 (134)
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Exploration for polymetallic nodules in the Indian ocean
Ocean Development & International Law, 1988Abstract A study of polymetallic nodules in the Indian Ocean taken up as an R & D Project has been extended into an exploratory programme for nodule resources. Recognition of India as a Pioneer Investor by the UNCLOS led to the acceleration of the programme to meet time targets. Planning and coordination ensured accuracy and success of the programme by
H.N. Siddiquie, P.S. Rao
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Tubotomaculum: a bacterially-mediated polymetallic nodule
2019Since the 50s of the last century, several authors have investigated the nature of Tubotomaculum: enigmatic Mn-Fe mineralizations occurring in the latest Oligocene – Early Miocene varicoloured clays of the western Mediterranean area. Some authors regarded these structures as fossil traces[1], as fossil corals covered by Fe-oxides and manganite[2], or ...
S. Bernardini +8 more
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Marine biominerals: perspectives and challenges for polymetallic nodules and crusts
Trends in Biotechnology, 2009Deep sea minerals in polymetallic nodules, crusts and hydrothermal vents are not only formed by mineralization but also by biologically driven processes involving microorganisms (biomineralization). Within the nodules, free-living and biofilm-forming bacteria provide the matrix for manganese deposition, and in cobalt-rich crusts, coccolithophores ...
Xiaohong, Wang, Werner E G, Müller
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Composition, Formation, and Occurrence of Polymetallic Nodules
2017Manganese nodules occur as two-dimensional deposits in abyssal plains of all major oceans. In the Clarion-Clipperton Zone of the northeast equatorial Pacific alone, the amount of nodules is estimated to 21 billion tons indicating the huge potential of this deposit type.
T. Kuhn +3 more
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Polymetallic Nodules: Resource Potential and Mining Prospects
Marine Technology Society Journal, 2021Abstract Deep-sea minerals such as polymetallic nodules have attracted significant interest among stakeholders not only for evaluating their potential as an alternative source of critical metals that are required for various industrial applications including green energy but also in developing technology for their exploitation. There has been a steady
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Metallurgical Processing of Polymetallic Ocean Nodules
2017During the last five decades metallurgical processing of polymetallic nodule is of global interest—as well as a challenge—for researchers, and industries. This has generated a vast knowledge base, but till now there is no commercial operation. Some of the main reasons are: (1) lack of a techno-economically feasible mining operation, (2) poor economics ...
R. P. Das, S. Anand
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Exploration for Polymetallic Nodules
1980This paper is an introduction to the field of polymetallic nodule exploration, most of which lies at the bottom of the ocean below 15,000 ft. Among the minerals that are expected to be found under the ocean, polymetallic nodules are probably the most unusual.
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Electrowinning of nickel in the processing of polymetallic sea nodules
Hydrometallurgy, 1990Abstract As the land based reserves for nickel in India are meagre its extraction from sea nodules will assume increasing importance in the coming years. In the processing of polymetallic sea nodules by the reduction roast/ammonia leach/solvent extraction route, the recovery of nickel by electrolysis was considered.
V. Kumar, B.D. Pandey, D.D. Akerkar
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Computer axial tomography investigation of polymetallic nodules
Marine Geology, 1997Abstract Polymetallic nodules collected from the Clarion-Clipperton region of the North Pacific Ocean have been investigated by using a SIEMENS SOMATROM HiQ computer tomograph. The reconstructed tomographies show much details in the internal structure of the nodules, such as nucleus shape and origin, primary and secondary growth surfaces, highly ...
O.G. Duliu, M.S. Tufan, S.A. Szobotka
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A study on arsenic adsorption on polymetallic sea nodule in aqueous medium
Water Research, 2005A detailed study on As(III) and As(V) adsorption on polymetallic sea nodule in aqueous medium has been reported. Elemental composition of sea nodule comprises primarily, iron, manganese and silicon with trace quantities of aluminium, copper, cobalt and nickel.
S, Maity +3 more
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