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REMOVAL OF Pb(II),
Cu(II) AND Cd(II) FROM AQUEOUS SOLUTION BY SOME FUNGI AND NATURAL
ADSORBENTS IN SINGLE AND MULTIPLE METAL SYSTEMS
AMNA
SHOAIB*, TASKEEN BADAR AND NABILA ASLAM
Abstract: Six fungal and 10 natural biosorbents were analyzed for their Cu(II), Cd(II) and Pb(II) uptake
capacity from single, binary and ternary metal ion system. Preliminary
screening biosorption of assays revealed 2 fungi (Aspergillus niger and
Cunninghamella echinulata) and three natural [Cicer arietinum husk,
Moringa oleifera flower & soil (clay)] adsorbents hold considerable high
adsorption efficiency and capacity for 3 metal ions amongst the
adsorbents. Further biosorption trials with five elected adsorbents
showed a considerable reduction in metal uptake capability of adsorbents
in binary- and ternary systems as compared to singly metal system.
Cd(II) manifested the highest inhibitory effect on the biosorption of
other metal ions, followed by Pb(II) and Cu(II). On account of metal
preference, the selectivity order for metal ion towards the studied
biomass matrices was Pb(II) (40-90%) > Cd(II) (2-53%) > Cu(II) (2-30%).
Institute of Agricultural Sciences, University of the
Punjab, Quaid-e-Azam Campus, Lahore-54590, Pakistan.
*Corresponding author E-mail:
aamnaa29@yahoo.com
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