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:: Volume 2, Issue 1 (12-2014) ::
jehe 2014, 2(1): 54-64 Back to browse issues page
Investigation of Acorn fruit Ash Efficiency in Cadmium Removal from Aqueous Solutions: Adsorption Isotherm and Kinetic Studies
Salman Zarei, Mahboubeh Dehvari, Behzad Jamshidi *, Mohsen Sadani
Abstract:   (4965 Views)

Background: Heavy metals are known as significant pollutants because of toxicity and nonbiodegradable characteristics. Cadmium is one of the heavy metals that have carcinogen potential. So, this study carried out in order to investigate the acorn fruit ash efficiency in cadmium removal from aqueous solutions. Methods: This study was done in the batch laboratory conditions. In this study, the effect of different parameters including pH, contact time, adsorbent dose, and initial cadmium concentration were evaluated. The Langmuir, Freundlich and Temkin isotherm models were used for analysis of the equilibrium isotherm. Adsorption kinetics of cadmium by different models were also investigated. The measurement of residual cadmium in the samples was determined by atomic absorption spectrophotometry at 228.8 nm. The SPSS-16 software was used for analysis of data. Results: According to the results, the maximum adsorption capacity of cadmium was 9.29 mg/g at pH=7 and 8 g/L adsorbent dose. The removal efficiency was increased with increasing contact time and decreased with increasing of cadmium initial concentration. Investigation of achieving data showed that the adsorption process followed better by Freundlich isotherm and the pseudo-second order kinetic. Conclusions: According to the results of this study, it could be concluded that the acorn fruit ash had high ability in cadmium adsorption and could be used as a cheap adsorbent in the removal of cadmium.

Keywords: Heavy metals, Adsorption process, Acorn fruit ash
Full-Text [PDF 386 kb]   (1807 Downloads)    
Type of Study: Research | Subject: Special
Received: 2015/09/14 | Accepted: 2015/09/14 | Published: 2015/09/14
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Zarei S, Dehvari M, Jamshidi B, Sadani M. Investigation of Acorn fruit Ash Efficiency in Cadmium Removal from Aqueous Solutions: Adsorption Isotherm and Kinetic Studies. jehe. 2014; 2 (1) :54-64
URL: http://jehe.abzums.ac.ir/article-1-123-en.html

Volume 2, Issue 1 (12-2014) Back to browse issues page
مجله مهندسی بهداشت محیط Journal of Environmental Health Enginering
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