Absorption of copper (Cu2+) and nickel (Ni2+) from aqueous solutions by volcanic ash soil


Abbas Esmaeily 1 , * , Simin Naseri 2 , Amir Hossein Mahvi 2

1 Department of Community Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.

2 Department of Environmental Health, Tehran University of Medical Sciences, Tehran, Iran.

How to Cite: Esmaeily A, Naseri S, Mahvi A H. Absorption of copper (Cu2+) and nickel (Ni2+) from aqueous solutions by volcanic ash soil, Hormozgan Med J. 2004 ; 8(1):e90595.


Hormozgan Medical Journal: 8 (1); e90595
Published Online: March 10, 2004
Article Type: Research Article
Received: September 02, 2003
Accepted: March 10, 2004


Introduction: Natural volcanic ash soil is one of minerals whose major contents
are metal oxides. In this study absorption of copper (Cu2+) and nickel (Ni2+) on
natural volcanic ash soil has been investigated at 27±1c as a function of PH,
metal concentration, contact time and the amount of sorbet, using batch
Methods: The necessary samples of natural volcanic ashes were collected from
Anar region in Kerman province, Iran. The samples were analyzed by using
quantitative and qualitative methods. In qualitative method, Gile’s classification
and in quantitative method, Langmuir and Freundlich isotherms were used.
Results: Both Langmuir and Freundlich models described the Cu2+ and Ni2+
absorption processes adequately, with correlation coefficient (R2) values ranging
from 0.97-0.99. The results show that equilibrium is reached quickly, indicating
that the adsorption sites are well exposed. The increase in initial metal ions
concentration decreased the percent adsorption and increased the amount of
metals uptake perunit weight of the sorbet (mg/g).
Conclusion: The results indicated that the absorption capacity of the volcanic ash
soil increased with an increase in the pH. The uptake of copper was found to be
greater than nickel.



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