Pathway of Sucrose Oxidation in Manganese (Pyrolusite) Nodule

Polymetallic sea nodules are the potential resources of copper, cobalt, manganese, and nickel. The exploration and exploitation of manganese nodules are necessary to meet the future demands of Mn in the world. This work describes the valuable extraction of Mn through an innovative approach of using...

Full description

Saved in:
Bibliographic Details
Published in:Industrial & engineering chemistry research 2015-12, Vol.54 (49), p.12233-12241
Main Authors: Baral, Ayon Bala, Dash, Barsha, Ghosh, Malay K, Subbaiah, Tondepu, Minakshi, Manickam
Format: Article
Language:English
Subjects:
Extraction
High temperature
Leaching
Manganese
Nickel
Nodules
Oxidation
Sucrose
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Polymetallic sea nodules are the potential resources of copper, cobalt, manganese, and nickel. The exploration and exploitation of manganese nodules are necessary to meet the future demands of Mn in the world. This work describes the valuable extraction of Mn through an innovative approach of using sucrose as a reductant. The metal extraction from the nodule leaching was studied in ambient temperature (27 °C) and at an elevated temperature 90 °C with and without agitation. In both cases, 99.9% of Mn was extracted while the extraction time appears to be significantly low (2 h) at 90 °C but it requires a longer time of 24 h at 27 °C. The optimum sucrose concentration selected was 7% (w/w) of nodule for maximum metal extraction. With use of 10% (v/v) H2SO4, 7% (w/w) sucrose at 90 °C, and solid to liquid (S/L) ratio of 1:10 the achieved metal recovery figures were the following: Mn >99%, Ni 98%, Cu 87%, Co 83% in 2 h. The oxidation pathway of sucrose is outlined in this study with the aid of mass spectrometry during reductive leaching of ocean bed nodule. Sucrose in acidic environment generates 1- or 6-monoacid of sucrose with ions of m/z (mass-to-charge ratio) 355 and 127, 5-hydroxymethylfurfural (5HMF). A dehydrated glucose complex (m/z 325) was generated at elevated temperature. These released organics act as reductant for the leaching of Mn2+ from MnO2. Glucaric acid (m/z 211) is generated as the end product of the sucrose oxidation in the solution.
ISSN:0888-5885
1520-5045
DOI:10.1021/acs.iecr.5b02881