Sorption behavior of cesium and strontium in selected soils of semiarid and arid regions of Iran
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Sorption–desorption phenomena of contaminants by soils are of great importance from the viewpoint of environmental and agricultural concerns. The knowledge of sorption–desorption characteristics of contaminants by soil is useful in simulation and prediction of contaminants, transport and diffusion in soil–water systems and uptake by plants. The adsorption behavior of Cs and Sr on two selected calcareous soils (clay and silty clay loam) with contrasting physical and chemical characteristics was studied in different concentrations of Cs and Sr by a batch method. The selected chemical and physical properties of the soils were determined and the dominant clay minerals of the soils were identified by XRD. Cs and Sr sorption characteristics were determined at 22.5 ± 0.5 °C in the presence of 0.01 M CaCl2. Freundlich isotherms were found to fit well with experimental data obtained for adsorbed Cs and Sr. This experiment showed that using the relative ratio of cations in the soil solution was better index to understand the phenomenon of the adsorption of Sr and Cs in saline-sodic soils. The higher amount of illite and vermiculite clay minerals in the soils contributed significantly to the higher affinity of Cs by the soils.
KeywordsStrontium Cesium Freundlich isotherm Calcareous soils
The authors would like to express their thanks and appreciation to Dr. Hassan Tofighi, Associate Professor, University of Tehran, Department of Soil Science and Dr. Shahin Oustan, Assistant Professor, University of Tabriz, Department of Soil Science for their advice and providing assistance during the course of this study.
- 1.McLean EO, Arscott TG, Volk VV (1960) Adsorption and release of strontium from clays and soils with equilibration, isotopic tracer and plant uptake techniques. Soil Sci Soc Am Proc 24:453–457Google Scholar
- 5.Sparks DL (2002) Environmental soil chemistry, 2nd edn. Academic Press, New YorkGoogle Scholar
- 14.Sparks DL, Page AL, Helmke PA, Leoppert RH, Soltanpour PN, Tabatabai MA, Johnston GT, Sumner ME (1996) Methods of soil analysis. Soil Science Society of America, Madison, pp 739–758Google Scholar
- 15.Kunze GW, Dixon JB (1986) Pretreatment for mineralogical analysis. In: Klute A (ed) Methods of soil analysis. Part 1. Physical and mineralogical methods. American Society of Agronomy, MadisonGoogle Scholar
- 16.Whittig LD, Allardice WR (1986) X-ray diffraction technique. In: Klute A (ed) Methods of soil analysis. Part 1. Physical and mineralogical methods. American Society of Agronomy, MadisonGoogle Scholar
- 18.Bangash MA (1991) Adsorption of fission products and other radionuclides on inorganic exchangers. Thesis of PhD in chemistry, University of the Punjab, LahoreGoogle Scholar
- 20.Price KR (1991) The depth distribution of 90Sr, 137Cs, and 239’240pu in soil profile samples. Radiochim Acta 54:145–147Google Scholar