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Examining temperature effect on the adsorption and desorption of cadmium from soil surfaces and the best adsorption equation

Roqaiyeh Barihi, Ebrahim Panahpour, Abdol Ali Naseri

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J. Bio. Env. Sci.6(2), 472-478, February 2015


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In recent years, due to their simplicity, being relatively low price and also being reasonable and effective in the removal of heavy metal ions from wastewater, adsorption-based methods are of most interest. The objective of this research was studying adsorption isotherm of cadmium in the field’s soil of Amir- Kabir Sugarcane Crops And Industry Company. The study was done in factorial design consisted of four treatments in a randomized block, including: T0: The Company fields soil as control T1: Treatment with 50 mg per kg of cadmium from the Cd (NO3) source, T2: Treatment with 100 kg of cadmium from the Cd (NO3 ) source and T3: 150 milligrams per kilogram of cadmium from the source Cd (NO3) in 12 pots for each experiment, at three temperatures of minimum, average and maximum 16.6, 24.8 and 33.3, for the cultivation period in Amir-Kabir sugar cane cultivation and Technology Company was performed. The results showed that there was a significant difference between temperature, concentration, and interaction of temperature and concentration on adsorbable cadmium in soil at 1% test Duncan level. Such that, for the treatments of T1C4 and T3C3 the minimum and maximum soil adsorbable cadmium which being (0.1 and 31.41) were obtained, respectively. Adsorption data obtained by both Freundlich and Langmuir equation were fitted and their coefficients were calculated. Among both equations, The Freundlich equation describes adsorption behavior of cadmium in the soil in question better than the Langmuir one.


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Examining temperature effect on the adsorption and desorption of cadmium from soil surfaces and the best adsorption equation

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