Radiation-induced dissolution of colloidal manganese oxides

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Journal of Colloid and Interface Science; (United States)

DOI:https://doi.org/10.1016/0021-9797(88)90409-2· OSTI ID:6840865

Mulvaney, P; Denison, L; Grieser, F; Cooper, R ^[1]; Sanders, J V ^[2]; Meisel, D ^[3]

---

1. Univ. of Melbourne, Parkville, Victoria (Australia). Dept. of Physical Chemistry
2. CSIRO, Clayton (Australia). Division of Materials Science
3. Argonne National Lab., IL (United States). Chemistry Division

The reductive dissolution of several well-characterized suspensions of manganese oxides ([alpha]-, [delta]-, [gamma]-MnO[sub 2], and Mn[sub 5]O[sub 8]) under steady [gamma]-irradiation at pH 3 has been studied. Radiolytically produced reducing radicals (e.g., (CH[sub 3])[sub 2]COH, CH[sub 3]CHOH, HO[sub 2], and viologen radicals) can be quantitatively captured by the oxide suspension to release Mn[sup 2+] ions into the solution. The radiolytically produced H[sub 2]O[sub 2] similarly leads to quantitative dissolution of the oxide. The rate-determining step in the dissolution process is slower than the diffusion-controlled limit. The stoichiometry of the dissolution process under complete scavenging of the radicals is determined by the oxidation state of the oxide (x in MnO[sub x]).

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6840865
• Journal Information: Journal of Colloid and Interface Science; (United States), Journal Name: Journal of Colloid and Interface Science; (United States) Vol. 121:1; ISSN 0021-9797; ISSN JCISA5
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
CHALCOGENIDES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
COHERENT SCATTERING
COLLOIDS
CRYSTAL STRUCTURE
DATA
DIFFRACTION
DISPERSIONS
DISSOLUTION
ELECTROMAGNETIC RADIATION
ELECTRON MICROSCOPY
ELECTROPHORESIS
EXPERIMENTAL DATA
GAMMA RADIATION
INFORMATION
IONIZING RADIATIONS
MANGANESE COMPOUNDS
MANGANESE OXIDES
MICROSCOPY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
RADIATION EFFECTS
RADIATIONS
REDUCTION
SAMPLE PREPARATION
SCATTERING
SURFACE AREA
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
VALENCE
X-RAY DIFFRACTION