Marine polymetallic nodules or marine nodules are rocky bodies formed in the oceanic crust, where they are present in most oceans, at depths of 4,000 m. These mineral resources are characterized by having a high concentration of valuable metals such as Mn, Ni, Co, Cu, Fe, Te and rare earths. For the treatment of these, various investigations have been carried out in the recovery of metals such as segregation by roasting, ammonia and chlorinated leaching. From the exposed mechanisms, it is concluded that the most appropriate method for the treatment of marine nodules is acid leaching with iron reducing agents.

1.
J.
Hein
. “Manganese nodules. En:
Harff
J.
,
Meschede
M.
,
Petersen
S.
,
Thiede
J.
(Eds.).
Encyclopedia of Marine Geosciences
”.
Estados Unidos
.
Springer
, pp.
408
412
,
2016
.
2.
D.
Cronan
.”
Chapter 2 Deep-Sea Nodules: Distribution and Geochemistry
”.
Journal of Geophysical Research
, Vol.
80
, no.
27
, pp.
11
44
,
1977
.
3.
R.
Jana
,
D.
Singh
,
S.
Roy
. “
Alcohol-modified hydrochloric acid leaching of sea nodules
”.
Hydrometallurgy
, Vol.
38
, no.
3
, pp.
289
298
,
1995
.
4.
M.
Hoover
,
K.
Han
,
D.
Fuerstenau
. “
Segregation roasting of nickel, copper and cobalt from deep-sea manganese nodules
”.
International Journal of Mineral Processing
, Vol.
2
, no.
2
, pp.
173
185
,
1975
.
5.
W.
Kane
,
P.
Cardwell
.. ”
Recovery of metal values from ocean floor nodules
”. United States Paten US 3 752 745 (US 142687 (710512)),
1973
.
6.
S.
Kanungo
,
P.
Jena
. “
Reduction leaching of manganese nodules of Indian Ocean origin in dilute hydrochloric acid
”.
Hydrometallurgy
, Vol.
21
, no.
1
, pp.
41
58
,
1988
.
7.
S.
Khalafalla
,
J.
Pahlman
. “
Selective Extraction of Metals from Pacific Sea Nodules with Dissolved Sulfur Dioxide
”.
JOM
, Vol.
33
, no.
8
, pp.
37
42
,
1981
.
8.
B.
Song
,
S.
Liu
,
X.
Dong
. “
A novel process to effectively extract values from a manganese-bearing Au-Ag ore by pretreatment with iron scrap as reductant
”.
Russ. J. Non-ferrous Metals
, Vol.
57
, pp.
85
91
,
2016
.
9.
N.
Toro
,
N.
Herrera
,
J.
Castillo
,
C.
Torre
,
R.
Sepulveda
. “
Initial Investigation into the Leaching of Manganese from Nodules at Room Temperature with the Use of Sulfuric Acid and the Addition of Foundry Slag—Part I
”.
Minerals
, Vol.
8
, pp-
565
,
2018
.
10.
N
,
Toro
,
N.
Herrera
,
J.
Castillo
,
C.
Torre
. “
Artículo Original Uso de Fe como agente reductor en procesos hidrometalúrgicos Use of Fe as a reducing agent in hydrometallurgical processes
”,
2019
11.
D.
Torres
,
L.
Ayala
,
M.
Saldaña
,
M.
Canovas
,
R.
Jeldres
,
S.
Nieto
,
J.
Castillo
,
P.
Robles
,
N.
Toro
. “
Leaching Manganese Nodules in an Acid Medium and Room Temperature Comparing the Use of Different Fe Reducing Agents
”.
Metales - Open Access Metallurgy Journal
, Vol.
9
, no.
12
,
2019
.
12.
N.
Randhawa
,
J.
Hait
,
R.
Jana
. “
A brief overview on manganese nodules processing signifying the detail in the Indian context highlighting the international scenario
”.
Hydrometallurgy
, Vol.
165
, no.
1
, pp.
166
181
,
2016
.
13.
T.
Abramovski
,
V.
Stefanova
,
R.
Causse
,
A.
Romanchuk
. “
Technologies for the processing of polymetallic nodules from Clarion Clipperton Zone in the Pacific Ocean
”.
Journal of Chemical Technology and Metallurgy
, Vol.
52
, no.
2
, pp.
258
269
,
2017
.
14.
M.
Kawahara
,
K.
Tokikawa
,
T.
Mitsuo
. “
Sulfating Roasting of Manganese Nodules and Selective Leaching of Roasted Ore
”.
Shigen-to-Sozai
, Vol.
107
, no.
5
, pp.
305
309
,
1991
.
15.
J.
Pahlman
,
S.
Khalafalla
. “
Selective recovery of nickel, cobalt, manganese from sea nodules with sulfurous acid
”. United States Paten US 4 138 465 (US 860249 (
771213
)),
1979
.
16.
M.
Van Hecke
,
R.
Bartlett
. “
Kinetics of sulfation of atlantic ocean manganese nodules
”.
Metallurgical Transactions
, Vol.
4
, no.
4
, pp.
941
947
,
1973
.
17.
T.
Wilder
. “
Two stage selective leaching of copper and nickel from complex ore
”. United States Patent US 3 736 125 (US 55306 (700716)),
1973
.
18.
R.
Jana
,
D.
Akerkar
. “
Studies of the metal-ammonia-carbon dioxide-water system in extraction metallurgy of polymetallic sea nodules
”.
Hydrometallurgy
, Vol.
22
, no.
3
, pp.
363
378
,
1989
.
19.
K.
Han
,
D.
Fuerstenau
. “
Acid leaching of ocean manganese nodules at elevated temperaturas
”.
International Journal of Mineral Processing
, Vol.
2
, no.
2
, pp.
163
171
,
1975
.
20.
K.
Nathsarma
,
P.
Bhaskara
. “
Separation of iron and manganese from sulphate solutions obtained from indian ocean nodules
”.
Hydrometallurgy
, Vol.
17
, no.
2
, pp.
239
249
,
1987
.
21.
L.
Szabo
. “
Recovery of metal values from manganese deep sea nodules using ammoniacal cuprous leach solutions
”. United States Patent US 3 983 017 (US 548430 (750210)),
1976
.
22.
A.
Zakeri
,
M.
Bafghi
,
Sh.
Shahriari
. “
Dissolution Kinetics of Manganese Dioxide Ore in Sulfuric Acid in the Presence of Ferrous Ion
”.
Iranian Journal of Materials Science and Engineering
, Vol.
4
, no.
3-4
, pp.
22
27
,
2007
.
23.
M. S.
Bafghi
,
A.
Zakeri
,
Z.
Ghasemi
, and
M.
Adeli
, “
Reductive dissolution of manganese ore in sulfuric acid in the presence of iron metal
,”
Hydrometallurgy
, Vol.
90
, no.
2–4
, pp.
207
212
,
2008
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