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Leaching Studies of Deep-Sea Manganese Nodule with Ferrous Sulfate Solutions

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 35 Issue 1 Page 43-51
published_at 1984
KJ00000156527.pdf
[fulltext] 842 KB
Title
硫酸第一鉄溶液による深海底マンガン・ノジュールの浸出
Leaching Studies of Deep-Sea Manganese Nodule with Ferrous Sulfate Solutions
Creators Fujii Yujiro
Creators Mizota Tadato
Creators Kono Yoshimi
Source Identifiers
Improved extractions of valuable elements such as Mn, Cu, Ni and Co have been obtained by acidified ferrous sulfate leaching of deep-sea manganese nodule from the Pacific Ocean. This leaching is based on an oxidation-reduction reaction shown as : MnO_2+2(Fe)^<2+>+4H^+=(Mn)^<2+>+2(Fe)^<8+>+2H_2O MnO_2 in the nodule growth layer is reduced to (Mn)^<2+> by the aid of (Fe)^<2+> ions in the leaching solution, thus releasing valuable elements contained in Mn phase of the nodule. Better Mn extractions together with Cu, Ni and Co were obtained in solutions of 0.05M FeSO_4 and 0.05M H_2SO_4 in 1.5 hour of leach time in comparison with poor extraction obtained in the 0.05M H_2SO_4 leaching solutions without FeSO_4. Extractions of Mn, Cu, Ni and Co decreased gradually in the solutions at higher FeSO_4 concentration range over 0.05M due to deficiency in H_2SO_4 and hydrolysis of the (Fe)^<3+> ions produced through the above leaching reaction. Equi-extractive contour lines are also presented on FeSO_4-H_2SO_4 diagram showing concentration limits of both FeSO_4 and H_2SO_4 in the solution to obtain better extractions in the FeSO_4 leaching as well as optimum leaching conditions.
Subjects
材料工学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1984
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部