The Effect of Chloride and Sulfate Ions on the Adsorption of Cd2+ on Clay and Sandy Loam Egyptian Soils
Adsorption of Cd2+ on two types of Egyptian soils: clay (alluvial) and sandy loam (calcareous), was studied. Effect of changing the matrix electrolyte type and concentration was used to mimic the natural soil salts. Kinetics and thermodynamic parameters of the adsorption were calculated at two diffe...
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| Language: | English |
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Wiley
2014-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/806252 |
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| author | Mohamed E. EL-Hefnawy Elmetwaly M. Selim Faiz F. Assaad Ali I. Ismail |
| author_facet | Mohamed E. EL-Hefnawy Elmetwaly M. Selim Faiz F. Assaad Ali I. Ismail |
| author_sort | Mohamed E. EL-Hefnawy |
| collection | DOAJ |
| description | Adsorption of Cd2+ on two types of Egyptian soils: clay (alluvial) and sandy loam (calcareous), was studied. Effect of changing the matrix electrolyte type and concentration was used to mimic the natural soil salts. Kinetics and thermodynamic parameters of the adsorption were calculated at two different electrolyte concentrations: 0.05 N and 0.15 N. The adsorption was described by Langmuir and Freundlich isotherms. Results showed that lower concentration of the NaCl or Na2SO4 electrolytes (0.05 N) had higher adsorption capacity. Also, the maximum adsorption of cadmium when using sulfate counter ion is about two to three times higher than that when using chloride (544 μg/g for alluvial soil and 170 μg/g for calcareous soil when using 0.05 N). Using NaCl as matrix electrolyte, Freundlich isotherms showed bi-linear fits that probably mean a two energy level adsorption. This might be explained by either the competition of Cd2+ with Na+ or its complexation with Cl−. |
| format | Article |
| id | doaj-art-c3739a30896e446c9c48126b5674c170 |
| institution | DOAJ |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-c3739a30896e446c9c48126b5674c1702025-08-20T03:23:11ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/806252806252The Effect of Chloride and Sulfate Ions on the Adsorption of Cd2+ on Clay and Sandy Loam Egyptian SoilsMohamed E. EL-Hefnawy0Elmetwaly M. Selim1Faiz F. Assaad2Ali I. Ismail3Chemistry Department, Rabigh College of Sciences and Arts, King Abdulaziz University, P.O. Box 344, Rabigh 21911, Saudi ArabiaBiological Sciences Department, Rabigh College of Science and Arts, King Abdulaziz University, P.O. Box 344, Rabigh 21911, Saudi ArabiaSoils and Water Use Department, Agricultural and Biological Division, National Research Centre, 33 Al Behoos Street, P.O. Box 12622, Dokki, Cairo, EgyptChemistry Department, Rabigh College of Sciences and Arts, King Abdulaziz University, P.O. Box 344, Rabigh 21911, Saudi ArabiaAdsorption of Cd2+ on two types of Egyptian soils: clay (alluvial) and sandy loam (calcareous), was studied. Effect of changing the matrix electrolyte type and concentration was used to mimic the natural soil salts. Kinetics and thermodynamic parameters of the adsorption were calculated at two different electrolyte concentrations: 0.05 N and 0.15 N. The adsorption was described by Langmuir and Freundlich isotherms. Results showed that lower concentration of the NaCl or Na2SO4 electrolytes (0.05 N) had higher adsorption capacity. Also, the maximum adsorption of cadmium when using sulfate counter ion is about two to three times higher than that when using chloride (544 μg/g for alluvial soil and 170 μg/g for calcareous soil when using 0.05 N). Using NaCl as matrix electrolyte, Freundlich isotherms showed bi-linear fits that probably mean a two energy level adsorption. This might be explained by either the competition of Cd2+ with Na+ or its complexation with Cl−.http://dx.doi.org/10.1155/2014/806252 |
| spellingShingle | Mohamed E. EL-Hefnawy Elmetwaly M. Selim Faiz F. Assaad Ali I. Ismail The Effect of Chloride and Sulfate Ions on the Adsorption of Cd2+ on Clay and Sandy Loam Egyptian Soils The Scientific World Journal |
| title | The Effect of Chloride and Sulfate Ions on the Adsorption of Cd2+ on Clay and Sandy Loam Egyptian Soils |
| title_full | The Effect of Chloride and Sulfate Ions on the Adsorption of Cd2+ on Clay and Sandy Loam Egyptian Soils |
| title_fullStr | The Effect of Chloride and Sulfate Ions on the Adsorption of Cd2+ on Clay and Sandy Loam Egyptian Soils |
| title_full_unstemmed | The Effect of Chloride and Sulfate Ions on the Adsorption of Cd2+ on Clay and Sandy Loam Egyptian Soils |
| title_short | The Effect of Chloride and Sulfate Ions on the Adsorption of Cd2+ on Clay and Sandy Loam Egyptian Soils |
| title_sort | effect of chloride and sulfate ions on the adsorption of cd2 on clay and sandy loam egyptian soils |
| url | http://dx.doi.org/10.1155/2014/806252 |
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