Results 11 to 20 of about 91,473 (196)

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
Przemysław J. Borkowski, Tomasz Abramowski, Monika Szada-Borzyszkowska, Wiesław Szada-Borzyszkowski   +3 more
core   +4 more sources

The Significance of Nanomineral Particles during the Growth Process of Polymetallic Nodules in the Western Pacific Ocean [PDF]

Int J Environ Res Public Health, 2022
As a huge reservoir of economic metallic elements, oceanic polymetallic nodules have important strategic significance and are one of the main research objects in marine geology, especially their formation process and genetic mechanism.
Zhourong Cai, Qianru Huang, Qiangtai Huang, Bo He, Huang, Qiangtai, Huang, Qianru, He, Bo, Cai, Zhourong   +7 more
core   +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

No link between polymetallic nodules and anomalous oxygen concentration increases in benthic experiments from the Clarion Clipperton Zone [version 2; peer review: 2 approved, 1 approved with reservations, 1 not approved] [PDF]

F1000Research
* Background Polymetallic nodules in the deep sea of the Clarion Clipperton zone (CCZ) have been implicated in the abiotic production of oxygen during benthic chamber respirometer experiments.
Alexander P. Webber, Patrick Downes, Joaquim Bento, Leigh Marsh, Felipe S. Freitas, Michael Clarke   +5 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

Accurate Identification Method of Small-Size Polymetallic Nodules Based on Seafloor Hyperspectral Data

Journal of Marine Science and Engineering
Polymetallic nodules are spherical or ellipsoidal mineral aggregates formed naturally in deep-sea environments. They contain a variety of metallic elements and are important solid mineral resources on the seabed.
Kai Sun, Ziyin Wu, Mingwei Wang, Jihong Shang, Zhihao Liu, Dineng Zhao, Xiaowen Luo   +6 more
doaj   +2 more sources

Threatened by mining, polymetallic nodules are required to preserve abyssal epifauna [PDF]

Scientific Reports, 2016
Abstract Polymetallic nodule mining at abyssal depths in the Clarion Clipperton Fracture Zone (Eastern Central Pacific) will impact one of the most remote and least known environments on Earth. Since vast areas are being targeted by concession holders for future mining, large-scale effects of these activities are ...
Vanreusel, Ann, Hilario, Ana, Ribeiro, Pedro A., Menot, Lenaick, Arbizu, Pedro Martinez   +4 more
openaire   +9 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

Life inside polymetallic nodules

Abstract Deep-sea abyssal plains harbour extensive biodiversity, much of which remains undocumented. Polymetallic nodules in the abyssal plains of the Clarion-Clipperton Zone (CCZ), Central Pacific, harbour diverse meiofaunal communities within their crevices, representing an understudied habitat.
Coral Diaz-Recio Lorenzo, Tanja Stratmann, Mark Eduard de Wilt, Ranju Radhakrishnan, Lara Macheriotou, Ellen Pape, Lucille Hoogerdijk, Nadinne Jeanneth van den Hooven-Iza, Jan Tobias Krüger, Lea Kaspersmeier, Moritz Neuser, Moritz Klöckner, Martin Lauth, Mirko Schaper, Tasnim Patel, Sabine Gollner   +15 more
openaire   +2 more sources