Badanie wpływu odczynników powierzchniowych na poprawę właściwości osadu pod kątem głębinowego górnictwa pierwiastków rzadkich

Translated title of the contribution: Study on addition of surfactants agents to improve the behavior of high water content sediment for rare earth mining in deep sea

Takashi Sasaoka, Akihiro Hamanaka, Takahiro Funatsu, Hideki Shimada, Keisuke Takahashi

Research output: Contribution to journalArticlepeer-review

Abstract

Importance of rare mineral metal resources is increasing currently. Therefore, the rare earth elements rich mud which exist on the deep-sea floor has the potential to be developed to fulfill their demand. As one of the effective mining method, a suction mining method is expected to apply to seabed mining. The seabed sediment containing rare earth element shows the very high water content, more than 100%. And the sediment movement during the suction is greatly affected by the water content (WC) and liquid limit (WL) of the material. Therefore, it is important to modify the liquid limit by adding a chemical agent to control the behavior of sediment. We selected eight different surfactants which can be divided into three types. They are dispersant type, water retention type, and thickener type. We carried out a liquid limit test and viscosity measurement of the sediment mixed with the agents. It is found that the water-absorbing polymer and the hydroxyethyl cellulose increase the liquid limit and viscosity. Whereas, the alkyl ammonium salt surfactant and the alkyl ammonium salt, alkyl aryl sulfonate blend decrease the liquid limit and viscosity. It is possible to control sediment behavior by adding suitable surfactants.

Translated title of the contributionStudy on addition of surfactants agents to improve the behavior of high water content sediment for rare earth mining in deep sea
Original languagePolish
Pages (from-to)183-188
Number of pages6
JournalInternational Journal of Electrical and Computer Engineering Systems
Volume2020
Issue number2
DOIs
Publication statusPublished - 2020

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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