Hariani, Poedji Loekitowati and Salni, Salni Peer review, CoFe2O4 Modified with Polyethylene Glycol (PEG) for Removal of Chromium (VI) Ion from Electroplating Wastewater. King Mongkut’s University of Technology North Bangkok, Thailand.
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Abstract
One of the contaminants in the wastewater of the electroplating industry is Cr (VI). In this study, the magnetic adsorbent of CoFe2O4 which was coated with polyethylene glycol (PEG)-4000 was synthesized and used to removal of Cr (VI) from electroplating wastewater. The adsorbent obtained was characterized by X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Dispersive Energy X-Ray Spectrometer (EDS) and Vibrating Sample Magnetometer (VSM). The adsorption process was studied by the variable of the effects of the solution pH, contact time and weight of the adsorbent. Langmuir and Freundlich isotherm models were used to describe the interaction between the adsorbate and adsorbent. The kinetics and thermodynamics were used to determine the mechanism of adsorption. The results of the study showed that optimum condition for removal of Cr (VI) onto CoFe2O4 and CoFe2O4-PEG at pH 3 with contact time 35 minutes and weight of adsorbent 0.1 g. The adsorption process was in accordance with Langmuir’s isotherm with maximum adsorption capacity using CoFe2O4 and CoFe2O4-PEG of 40.983 and 42.107 mg/g, respectively. The kinetics of the reaction of both adsorbents corresponded to the pseudo second-order. The value of the negative free energy (∆G0 ) indicated that the reaction occurred spontaneously. The efficiency for removal of Cr (VI) from the electroplating wastewater by CoFe2O4 and CoFe2O4-PEG was 68.48% and 73.39%, respectively.
| Item Type: | Other |
|---|---|
| Subjects: | |
| Divisions: | 08-Faculty of Mathematics and Natural Science > 46201-Biology (S1) |
| Depositing User: | Salni Salni |
| Date Deposited: | 28 Sep 2021 09:59 |
| Last Modified: | 27 Jun 2024 02:30 |
| URI: | http://repository.unsri.ac.id/id/eprint/50254 |
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