Ternary biosorption studies of Cd(II), Cr(III) and Ni(II) on shelled Moringa oleifera seeds.
Competitive biosorption of Cd(II), Cr(III) and Ni(II) on unmodified shelled Moringa oleifera seeds (SMOS) present in ternary mixture were compared with the single metal solution. The extent of adsorption capacity of the ternary metal ions tested on unmodified SMOS was low (10-20%) as compared to single metal ions. SMOS removed the target metal ions in the selectivity order of Cd(II) > Cr(III) > Ni(II). Sorption equilibria, calculated from adsorption data, explained favorable performance of biosorption system. Regeneration of exhausted biomass was also attempted for several cycles with a view to restore the sorbent to its original state.
Sharma
Parul
P
Department of Chemistry, Dayalbagh Educational Institute, Dayalbagh, Agra 282 005, India.
Kumari
Pushpa
P
Srivastava
M M
MM
Srivastava
Shalini
S
D000327:Adsorption; D002104:Cadmium / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D029588:Moringa oleifera / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry*
D002104:Cadmium; D002857:Chromium; D009532:Nickel