پديد آورندگان :
Jaafarzadeh، Nematollah نويسنده Department of Environmental Health Engineering, School of Health, Ahvaz Jondishapour University of Medical Sciences, Ahvaz, Iran , , Mengelizadeh، Nezamaddin نويسنده M.Sc. of Environmental Health Engineering, Member of Environmental Technology Researches Centre, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. , , Hormozinejad، Mina نويسنده M.Sc. of Environmental Health Engineering, Health Faculty, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. ,
كليدواژه :
Adsorption, Adsorption isotherm, Chitin, Kinetic model, Zinc
چكيده فارسي :
Background: Chitin and its derivatives (chitosan) are natural
biopolymer produced from crustacean shell, which due to their
active functional groups such as amine and hydroxyl have high
ability to absorb heavy metals from water and wastewater. The
aim of this study was to investigate zinc removal from aqueous
solutions by using chitin extracted from shrimp shells.
Material and methods: To study the removal of zinc, chitin
extracted from shrimp shells was used as biosorption in a batch
system. In addition, the influence of pH, initial metal
concentration, amount of adsorbent and contact time on
adsorption process was investigated.
Results: The results of this research showed that the absorption
capacity of zinc closely depended on the pH of solution, as zinc
absorption concentration increased in terms of mg/g with
increasing pH. The results of equilibrium studies revealed that
zinc absorption process on the extracted chitin was desirable
and followed the Freundlich isotherm model and pseudo second
kinetic model. Moreover, Fourier Transform Infrared
Spectroscopy (FTIR) results indicated that functional groups
such as amine (-NH2) and hydroxyl (-OH) had the highest effect
on adsorption of zinc.
Conclusion: According to the obtained results, the chitin
extracted from shrimp shells appeared to be a suitable adsorbent
for removing zinc from aqueous solutions.
