Results 1 to 10 of about 264,883 (215)

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   +3 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   +3 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   +4 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   +3 more sources

Potential impacts of polymetallic nodule removal on deep-sea meiofauna [PDF]

Scientific Reports, 2021
Deep seabed mining is potentially imminent in the Clarion Clipperton Fracture Zone (CCFZ; northeast Pacific). Seabed collectors will remove polymetallic nodules and the surrounding surface sediments, both inhabited by meiofauna, along their path.
Ellen Pape, Tania Nara Bezerra, Hendrik Gheerardyn, Marius Buydens, Amanda Kieswetter, Ann Vanreusel   +5 more
doaj   +6 more sources

Research Status of Deep-Sea Polymetallic Nodule Collection Technology [PDF]

Journal of Marine Science and Engineering
The bottom of the ocean is rich in mineral resources, and deep-sea mining has been a research hotspot in recent years. As a key part of deep-sea mining operation, polymetallic nodule collection technology has been researched in many countries around the ...
Boying Liu, Xiaoxiang Wang, Xiuzhan Zhang, Jiancheng Liu, Liangwan Rong, Yong Ma   +5 more
doaj   +3 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

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

Materials (Basel), 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
Borkowski PJ, Abramowski T, Szada-Borzyszkowska M, Szada-Borzyszkowski W.   +3 more
europepmc   +3 more sources

Low-waste, single-step, sustainable extraction of critical metals from deep-sea polymetallic nodules. [PDF]

Sci Adv
To support the green energy transition, sustainable supplies of critical metals—60 million (metric) tons of copper, 10 million tons of nickel, and 1 million tons of cobalt—annually by 2050 are essential.
Manzoor U, Lüttke T, Raabe D, Souza Filho IR.   +3 more
europepmc   +2 more sources

Biological responses to disturbance from simulated deep-sea polymetallic nodule mining. [PDF]

PLoS ONE, 2017
Commercial-scale mining for polymetallic nodules could have a major impact on the deep-sea environment, but the effects of these mining activities on deep-sea ecosystems are very poorly known. The first commercial test mining for polymetallic nodules was
Daniel O B Jones, Stefanie Kaiser, Andrew K Sweetman, Craig R Smith, Lenaick Menot, Annemiek Vink, Dwight Trueblood, Jens Greinert, David S M Billett, Pedro Martinez Arbizu, Teresa Radziejewska, Ravail Singh, Baban Ingole, Tanja Stratmann, Erik Simon-Lledó, Jennifer M Durden, Malcolm R Clark   +16 more
doaj   +3 more sources