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MONO AND COMPETITIVE ADSORPTION OF Zn, Cu AND Mn IN DIFFERENT CALCAREOUS SOILS

Authors :
Hudhaifa AL-Hamandi
Mijbil Mohammad Aljumaily
Mohammed Ali Al-Obaidi
Source :
Revista de Agricultura Neotropical, Vol 11, Iss 3 (2024)
Publication Year :
2024
Publisher :
Universidade Estadual de Mato Grosso do Sul, 2024.

Abstract

Soil carbonate is considered an effective adsorbent to trace element retention. Many researchers have studied the preferential adsorption of those heavy metals on calcareous soils. In 2021- 2022, an experiment was conducted in agriculture college laboratories to assess the mono and competitive of three trace elements (Cu, Zn, Mn) on three calcareous soils that differ in their CaCO3 content. Calcareous representative soil samples were collected from different Nineveh governorate and north Iraq locations. The adsorption experiment was carried out using the batch method by equilibrating 2.5 gm soil with 25 ml of a solution containing concentrations of (1.5, 10, 20, 30, 40, 50, 60 and 70 mg. L-1) of all traced elements in the same concentrations. Sorption isotherms were characterized using linear Langmuir and Freundlich equations. Results showed huge differences in sorptions capacities and other studied parameters. All studied soils showed a high maximum adsorption capacity Qmax and strength binding for Cu than Zn and Mn. On the basis of Qmax and distribution coefficient values (Σkd) for each studied soil and element, the selectivity sequence was as follows Cu>Zn >Mn. Gibbs free energy (-ΔG) values were decreased as the sorption capacity decreased too. In mono and ternary adsorption system, Langmuir isotherms were of H-type whereas Freundlich isotherms were of C-type. The soil properties such as CaCO3, pH, Clay, C.E.C, and O.M were significantly related to trace elements adsorption.

Details

Language :
English, Portuguese
ISSN :
23586303
Volume :
11
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Revista de Agricultura Neotropical
Publication Type :
Academic Journal
Accession number :
edsdoj.1e6f50ec59f241c68ce1b2529ee27d98
Document Type :
article