A series of strontium-lanthanum oxide mixed manganese nodules were prepared and characterized by X-ray diffraction, nitrogen adsorption-desorption, electrical conductivity, and surface excess oxygen. X-ray diffraction patterns confirm the formation of perovskite-type oxides at low strontium content
Studies on Indian Ocean Manganese Nodules. VIII. Adsorption of Aqueous Phosphate on Ferromanganese Nodules
โ Scribed by K.M. Parida; S. Mohanty
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 152 KB
- Volume
- 199
- Category
- Article
- ISSN
- 0021-9797
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โฆ Synopsis
45 mm) were dried at 110ะC for 8 h and stored in a Adsorption of aqueous phosphate on Indian Ocean manganese desiccator over fused CaCl 2 for further use in characterizanodules was studied as a function of time, pH, and concentrations tion and adsorption studies.
of adsorbate and adsorbent in acetic acid-sodium acetate buffer
The chemical and physical characterization of manganese medium. The adsorption of phosphate follows the Langmuir adnodules is as described earlier (9). A partial chemical analysorption isotherm. The adsorption capacities of various manganese sis along with some of the surface properties of manganese nodules for phosphate were correlated with the chemical composinodules used in the present study is given in Table I, which tion and surface properties.
๐ SIMILAR VOLUMES
Adsorption of aqueous selenite (SeO32-) on Indian Ocean manganese nodules was studied as a function of time, temperature, pH, and concentrations of adsorbate and adsorbent in acetic acid-sodium acetate buffer medium. Analysis of adsorption data supports a heterogeneous nature for the surface of mang
process of accumulation of heavy metal ions on the surface The adsorption behavior of M 2/ ions ( M ร Cu, Co, Ni, and of manganese nodules on the ocean bed we have studied the Pb ) onto manganese nodules has been investigated at 3.5 ยฃ pH adsorption of some bivalent metal cations [Cu(II), Ni(II), ยฃ 5
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
ร400ะC (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