Results 1 to 10 of about 446 (170)

Comminution of Polymetallic Nodules with a High-Pressure Water Jet [PDF]

Materials, 2022
This paper presents an original method for the comminution of polymetallic nodules in a hydro-jet mill of our own design, having the water jet pressure in the range of 70–200 MPa. The best comminution results are ensured by equipping the mill with a water jet having a diameter dw = 0.7 mm and a comminution-homogenization tube having a diameter dh = 2.4
Wiesław Szada-Borzyszkowski, Przemysław Borkowski, Tomasz Abramowski   +2 more
exaly   +4 more sources

Alpha radiation from polymetallic nodules and potential health risks from deep-sea mining [PDF]

Scientific Reports, 2023
In search for critical elements, polymetallic nodules at the deep abyssal seafloor are targeted for mining operations. Nodules efficiently scavenge and retain several naturally occurring uranium-series radioisotopes, which predominantly emit alpha ...
Jessica B. Volz, Walter Geibert, Dennis Köhler, Michiel M. Rutgers van der Loeff, Sabine Kasten   +4 more
doaj   +2 more sources

Polymetallic nodules are essential for food-web integrity of a prospective deep-seabed mining area in Pacific abyssal plains [PDF]

Scientific Reports, 2021
Polymetallic nodule fields provide hard substrate for sessile organisms on the abyssal seafloor between 3000 and 6000 m water depth. Deep-seabed mining targets these mineral-rich nodules and will likely modify the consumer-resource (trophic) and ...
Tanja Stratmann, Karline Soetaert, Daniel Kersken, Dick van Oevelen   +3 more
doaj   +2 more sources

Simulation Experiment of Environmental Impact of Deep-Sea Mining: Response of Phytoplankton Community to Polymetallic Nodules and Sediment Enrichment in Surface Water [PDF]

Toxics, 2022
In this paper, simulation experiments were conducted to study the response of phytoplankton biomass and community composition to the influence of polymetallic nodules and sediment at four stations in the western Pacific in 2021.
Rimei Ou, Lei Cai, Jinli Qiu, Hao Huang, Danyun Ou, Weiwen Li, Fanyu Lin, Xuebao He, Lei Wang, Risheng Wu   +9 more
doaj   +2 more sources

Image segmentation and coverage estimation of deep-sea polymetallic nodules based on lightweight deep learning model [PDF]

Scientific Reports
Deep-sea polymetallic nodules, abundant in critical metal elements, are a vital strategic mineral resource. Accordingly, the prompt, accurate, and high-speed acquisition of parameters and distribution data for these nodules is crucial for the effective ...
Yue Hao, Shijuan Yan, Gang Yang, Yiping Luo, Dalong Liu, Chunhua Han, Xiangwen Ren, Dewen Du   +7 more
doaj   +2 more sources

Estimations of effective doses received from naturally occurring radioactivity in polymetallic nodules from the deep sea [PDF]

Scientific Reports
The strategic importance of metals found in deep-sea polymetallic nodules has spurred a surge in interest for their exploitation. However, nodules are known to incorporate radionuclides during their growth, so that any industrial processing would involve
Thomas Lüttke, Christian Kunze, Klaus Flesch, Jörg Dilling, Jens Fohlmeister, Holger Hummrich, Robert Arndt, Annegret Krzikalla, Christian Lucks, Thomas Kuhn, Annemiek Vink, Carsten Rühlemann   +11 more
doaj   +2 more sources

Review and Integrated Framework for Deep-Sea Mineral Resources, Ecological Influence, and Future Development. [PDF]

Int J Microbiol
As global industrialization advances and land‐based resources decline, deep‐sea resource development is becoming increasingly vital. The deep sea is rich in minerals such as polymetallic nodules, polymetallic sulfides, and cobalt‐rich crust. However, deep‐sea ecosystems and geochemical cycles can be severely impacted by extensive mineral mining.
Liu J, Wang C, Etim IN, Zhang R, Sand W, Wang X, Yang L, Ge Y, Liu J.   +8 more
europepmc   +2 more sources

Size reduction of CCZ polymetallic nodules under repeated impact fragmentation

Results in Engineering, 2020
Polymetallic nodules provide an alternative source of valuable metals. Nodules from the seabed of the Clarion Clipperton Zone (CCZ), a prospective mining area, are typically abundant at depths of around 5 ​km. Mining these nodules comprises excavation or
Edwin De Hoog
exaly   +3 more sources

Discovery of a mud-covering cephalopod evidences the complex life habits in the abyss. [PDF]

Ecology
Ecology, Volume 106, Issue 11, November 2025.
Mejía-Saenz A, Fleming BFM, Jones DOB, Van Audenhaege L, Hoving HJ, Simon-Lledó E.   +5 more
europepmc   +2 more sources

Complete mitochondrial genome of the abyssal coral Abyssoprimnoa gemina Cairns, 2015 (Octocorallia, Primnoidae) from the Clarion-Clipperton Zone, Pacific Ocean [PDF]

ZooKeys, 2023
The Clarion-Clipperton Zone (CCZ) in the tropical East Pacific is a region of interest for deep-sea mining due to its underwater deposits of polymetallic nodules containing economically important metals such as nickel, copper, and cobalt.
Romain Gastineau, Przemysław Dąbek, Kamila Mianowicz, Valcana Stoyanova, Artur Krawcewicz, Tomasz Abramowski   +5 more
doaj   +4 more sources