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- 저자 : Shahin Asan (검색결과 1 건)
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Milad Sangashekan,Shahin Asan,Hossein Ghanadzadeh Gilani 한국섬유공학회 2019 Fibers and polymers Vol.20 No.7
In this study, graphene oxide was synthesized and investigated as an adsorbent for eosin B elimination. Thefeatures and structure of graphene oxide were determined by employing scanning electron microscopy, transmission electronmicroscopy, Raman spectrometry, and X-ray diffractometry. Graphene oxide can remove dyes in water solutions, but it isconfronted by separation challenges. Therefore, zinc oxide was used as a coagulant for separation of the dye solution fromgraphene oxide. Adsorption properties such as contact time, dye concentration, dosage of adsorbent, zinc oxide content, pHeffect, and temperature were regularly investigated extensively. Concentrations of dyes in the supernatant suspension wereevaluated employing a visible spectrophotometric method at the maximum wavelength (λmax) of 514 nm. The eosin B dyeshowed maximum sorption capacity of 68.027 mg/g at pH 4 and T=298 K. Isotherm models such as Freundlich andLangmuir isotherms were used to determine the better suitable isotherm model. It was discovered that this dye adsorptioncapacity on adsorbent particles was monolayer and had a good agreement with the Langmuir isotherm. Pseudo-first-order andpseudo-second-order kinetic models were investigated to determine adsorption kinetics. The pseudo-second-order forsorption of this dye on adsorbents was followed by kinetic data analysis. This research shows that this sorbent and coagulantare efficacious and applicable for the removal of eosin B from wastewaters.
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