Studies on Indian Ocean Manganese Nodules: IV. Adsorption of Some Bivalent Heavy Metal Ions onto Ferromanganese Nodules

✍ Scribed by Kulamani Parida; Pramod K. Satapathy; Nigamananda Das

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 157 KB
• Volume: 181
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0402

✦ Synopsis

process of accumulation of heavy metal ions on the surface The adsorption behavior of M 2/ ions ( M Å 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 £ pH adsorption of some bivalent metal cations [Cu(II), Ni(II), £ 5.6 ( acetate -acetic acid buffer ) and 30 £ T ( ЊC ) £ 50. Under Co(II), and Pb(II)] onto central Indian Ocean manganese identical conditions the adsorption capacity for different metal nodules under varying conditions of temperature, pH, and ions increased in the order Ni 2/ õ Co 2/ õ Cu 2/ õ Pb 2/ . In adsorbate and adsorbent concentration.

all cases the extent of adsorption increased with increasing pH and temperature. The behavior of various metal ions released from manganese nodules during adsorption has also been dis-EXPERIMENTAL cussed.