—The aim of the present study was examination the
ability of different contents of kiwi shell to adsorb different
types (cadmium, nickel and lead) and concentrations (5, 10, 20,
30, 40, 50 and 100 mgl-1) of heavy metal ions from aqueous
solutions. The kiwi shell samples were collected from gardens of
northern Iran, washed and grounded to assess the monometal
and competitive adsorption behavior of Cd, Ni and Pb on the
kiwi shell. The sum of adsorbed heavy metals on the kiwi shell
could well described using both the Freundlich (R2 between
0.92 – 0.98) and Langmuir (R2 between 0.96 – 0.99) equations.
All of the sorption isotherms were of the L-curve type. Results
from the batch experiments show that the maximum adsorption
capacities of the metals by the kiwi shell were in the order of
Pb >> Ni > Cd based on the both monometal and competitive
systems. The distribution coefficient (kd), Freundlich capacity
coefficient (kF) and Langmuir maximum capacity (a) were
higher in monometal than in competitive system. Competition
significantly reduced metals k, especially for Cd and Ni. The
sorption capacity in different contents of kiwi shell was in the
order of 5 > 3 > 1 g for the metals. The total sorption amount
increased with the increasing the initial concentration of the
metal; however, distribution coefficient values for each metal
concentration at both systems indicated that the kiwi shell
capacities for sorption decreased with increasing the initial
concentration of the metals.
—Kiwi shell, sorption of heavy metals.
R. Galeshi. is with the Corporation of Mehravijhe, Iran (e-mail:
Cite: R. Galeshi, "Removal of Heavy Metals from Polluted Solutions Using Kiwi Shell," International Journal of Environmental Science and Development vol. 8, no. 2, pp. 75-79, 2017.