๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Studies on Indian Ocean Manganese Nodules: XI. Physicochemical Properties and Catalytic Activity of Acetic-Acid-Treated Manganese Nodules

โœ Scribed by Kulamani Parida; Pramoda Kumar Satapathy

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
105 KB
Volume
202
Category
Article
ISSN
0021-9797

No coin nor oath required. For personal study only.

โœฆ Synopsis

In order to activate the naturally occurring material, sam-The effects of acetic acid treatment on the physicochemical ples 075/45 mm were treated with various concentrations properties and catalytic activity of manganese nodules have been (0.1 to 1 M) of acetic acid. About 10 g of the sample was studied. The surface area, surface oxygen, surface acidity, surface placed in a 150-ml beaker and 50 ml of acetic acid of a hydroxyl groups, electrical conductivity, etc., increase gradually particular concentration was added to it, giving a solidwith acid treatment up to 0.5 M and thereafter show a decreasing liquid ratio of 1:5. Then the samples were stirred in acetic trend. The rate constants for H 2 O 2 decomposition and catalytic acid medium for 2 h using a magnetic stirrer. The resulting activity for CO oxidation also follow a trend similar to that of the suspension was filtered through a Buchner funnel using a surface properties.

๐Ÿ“œ SIMILAR VOLUMES

Studies on Indian Ocean Manganese Nodule
Studies on Indian Ocean Manganese Nodules: XII. Physicochemical Properties and Catalytic Activity of Sodium Hydroxide Treated Manganese Nodules
โœ K.M. Parida; P.K. Satapathy ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 64 KB

The effects of alkali (sodium hydroxide) treatment on the physico-chemical properties and catalytic activity for H 2 O 2 decomposition and CO oxidation of Indian Ocean manganese nodules have been studied. The surface area, surface oxygen, surface hydroxyl groups, etc. increase with alkali treatment

Studies on Indian Ocean Manganese Nodule
Studies on Indian Ocean Manganese Nodules: XI. Physicochemical Characterization and Catalytic Activity of Silver Oxide Mixed Manganese Nodules
โœ K.M. Parida; A.K. Sahoo; N.N. Das ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 144 KB

ร‡400ะŠC (8)(9)(10)(11). A number of attempts have been made to The promoting effect of Ag 2 O on the physicochemical properties modify the surface properties and catalytic activity of the and catalytic activity of manganese nodules has been investigated. nodules (10, 12, 13); for example, incorporati

Studies on Indian Ocean Manganese Nodule
Studies on Indian Ocean Manganese Nodules: Part V. Physicochemical Characteristics and Catalytic Activity of Rare Earth Oxide Mixed Manganese Nodules
โœ K.M. Parida; A.K. Sahoo; N.N. Das ๐Ÿ“‚ Article ๐Ÿ“… 1996 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 139 KB

A series of rare earth oxide mixed manganese nodules (perovskite type mixed oxides) have been prepared by coprecipitation method followed by calcination at 900ยฐC and characterized by different techniques. The effect of rare earth ions on the surface, textural and catalytic activity for the oxidation

Studies on Indian Ocean Manganese Nodule
Studies on Indian Ocean Manganese Nodules: 9. Catalytic Oxidation of Thiols to Disulphides by Central Indian Ocean Ferromanganese Nodules
โœ K.M. Parida; A. Samal; N.N. Das ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 102 KB

extensively studied and the results are well documented in The oxidation of thiols to corresponding disulfides by Indian the literature ( 16). However, their oxidizing ability and cata-Ocean ferromanganese nodules has been studied under varying lytic activity for organic reactions have been sparsely