Volume 19, Issue 4 (Iranian South Medical Journal 2016)                   Iran South Med J 2016, 19(4): 644-661 | Back to browse issues page

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Azari A, Rezaei Kalantary R, Keramati A, Dehghan S, Kakavandi B, Bahramifar H et al . Extraction and optimization of chitosan from shrimp shell: preparation, characterization and application in fluoride removal (isotherm, kinetic and thermodynamic studies). Iran South Med J 2016; 19 (4) :644-661
URL: http://ismj.bpums.ac.ir/article-1-821-en.html
Extraction and optimization of chitosan from shrimp shell: preparation, characterization and application in fluoride removal (isotherm, kinetic and thermodynamic studies)
Ali Azari1 , Roshanak Rezaei Kalantary2 , Azam Keramati * 3, Samaneh Dehghan2 , Babak Kakavandi4 , Hossein Bahramifar5 , Mohammad Eshaghi Gorji2
1- Research Center for Environmental Determinants of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
Department of Environmental Health Engineering, School of Health, Iran University of Medical Sciences, Tehran, Iran
2- Department of Environmental Health Engineering, School of Health, Iran University of Medical Sciences, Tehran, Iran
3- Department of Environmental Health Engineering, School of Health, Iran University of Medical Sciences, Tehran, Iran
Student’s Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran , a.keramati2014@yahoo.com
4- Department of Environmental Health Engineering, School of Health, Jundishapur University of Medical Sciences, Ahvaz, Iran
5- Pars Logistic Service. HSE officer. Mehr Petrochemical Co. Pars Especial Economic Energy Zone. Assaluyeh. Iran
Abstract:   (7661 Views)

Background: Fluoride in low concentrations is useful for human health. However, high concentrations of this substance is associated with problems such as fluorosis and Alzheimer's. Adsorption is efficient technique in removal of this pollutant. The aim of this study was to extraction and optimization of Chitosan as a natural biosorbent in fluoride removal.

Materials and Methods: In present study, magnetized chitosan-iron oxide nano particles was prepared by co-precipitation method and its characteristics were determined by SEM, XRD, TEM and FTIR analyzes. Subsequently, the effect of magnetized chitosan was assessed as an adsorbent in fluoride removal from water solution in the batch system with considering various parameters included pH, contact time, adsorbent dosage, initial Fluoride concentration and solution temperature. The Langmuir and Freundlich isotherm models and pseudo first-order and pseudo second-order kinetics were used to examine experimental data.

Results: The results showed that the Fluoride adsorption have followed Langmuir (R2>0.982) and kinetic model of pseudo second-order (R2>0.931). The maximum adsorption capacity of Fluoride was 22.756 mg/g at optimized condition, pH 50 adsorbent dose of 1g/L at 500C. Investigation of thermodynamically parameters and positive value of ΔH0 indicatethat this process was endothermic.

Conclusion: Generally, we can report that t he magnetic chitosan was used as a useful sorbent for the removal of pollutants from water and wastewater due to advantages such as easy and rapid separation from solution and high removal efficiency.

Keywords: shrimp shell, Extraction of chitin, Magnetic chitosan, Fluoride adsorption, Iron oxide nanoparticles
Full-Text [PDF 1242 kb]   (3247 Downloads)    
Type of Study: Original | Subject: Public Health
Received: 2015/07/29 | Accepted: 2015/10/27 | Published: 2016/09/7
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