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:: Volume 6, Issue 2 (3-2019) ::
jehe 2019, 6(2): 133-148 Back to browse issues page
Efficiency Assesment of Chitosan Graphene Oxide Composite in Aniline Removal from Aqueous Solutions
Fatemeh Azadbakht, Roshanak Kalantar, Ali Esrafili, Samira Shojaeyan, Mojtaba Yegane Badi, Mitra Gholami
Professor, Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
Abstract:   (70 Views)
Background: Aniline is a toxic compound characterized by high solubility in water (3.5 percent;
35000 mg/l) leading to increased presence risk of aniline in wastewater. The presence of this
compound in the blood causes the formation of met hemoglobin and prevent oxygen uptake and
plays a key role in chemical asphyxiation, moreover, it has been thought as a carcinogenic risk factor
to humans. Therefore, this study aims to synthesizes chitosan graphene oxide and determine the
usefulness of using this absorbent to remove aniline from aqueous solutions.
Methods: Chitosan Graphene Oxide (CGO) which was prepared from graphite powder by adapting
the procedure used by Hummer, doped with chitosan and the characterization of CGO were
determined by Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectroscopy
(FTIR) and X-ray Powder Diffraction (XRD). To optimize the conditions, parameters including
adsorbent dosage (g / L 0/2, 0/4, 0/6, 0/8, 1, 1/25,1/5), pH (2, 4, 6, 8, 10), contact time (5, 15, 30,
45, 60, 90, 120 min) and aniline concentrations (mg/L 50, 100, 150, 200, 300) were evaluated in a total
of 126 tests. Finally Chitosan Graphene Oxide was used for aniline removal from aqueous solutions.
Results: The results of present study showed that with increase in contact time and absorbent dosage
and with decrease in aniline concentration, removal efficiency tend to increase. PH=6, time=30min,
absorbent dose=1 g/l and concentration of aniline=50 mg/l were obtained as optimum conditions.
Under optimum condition (pH=6, time=30min, absorbent dose=1 g/l and concentration of
aniline=50 mg/l) the highest efficiency of aniline removal is %93.14. The adsorption isotherm showed
that absorption process correlates well with Langmuir adsorption isotherm (R2>0.9996). Reaction
kinetics complies with Pseudo-second order model with correlation coefficient of (R2=0.9799). In the
study of thermodynamics, negative values of ΔH0 and ΔG0 respectively illustrate that reactions are
exothermic and spontaneous.
Conclusion: chitosan graphene oxide composite has the ability to remove aniline effectively from
aqueous solutions. And also it can be used as an efficient adsorbent for related aqueous solutions.
Keywords: Adsorption, Aniline, Chitosan graphene oxide
Full-Text [PDF 666 kb]   (46 Downloads)    
Type of Study: Research | Subject: Special
Received: 2019/03/18 | Accepted: 2019/03/18 | Published: 2019/03/18
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Azadbakht F, kalantar R, esrafili A, Shojaeyan S, yegane Badi M, Gholami M. Efficiency Assesment of Chitosan Graphene Oxide Composite in Aniline Removal from Aqueous Solutions. jehe. 2019; 6 (2) :133-148
URL: http://jehe.abzums.ac.ir/article-1-609-en.html

Volume 6, Issue 2 (3-2019) Back to browse issues page
مجله مهندسی بهداشت محیط Journal of Environmental Health Enginering
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