Hermansyah, Hermansyah (2018) CoFe2O4 Modified with polyethylene glycol (PEG) for removal of chromium (VI) ion from electroplating wastewater (Similirity). Unsri, Unsri. (Unpublished)
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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. e adsorbent obtained was characterized by X-Ray Di raction (XRD), Scanning Electron Microscope (SEM), Dispersive Energy X-Ray Spectrometer (EDS) and Vibrating Sample Magnetometer (VSM). e adsorption process was studied by the variable of the e ects 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. e kinetics and thermodynamics were used to determine the mechanism of adsorption. e 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. e 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. e kinetics of the reaction of both adsorbents corresponded to the pseudo second-order. e value of the negative free energy (∆G0) indicated that the reaction occurred spontaneously. e e ciency 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: | Q Science > QD Chemistry > QD1-999 Chemistry |
| Divisions: | 08-Faculty of Mathematics and Natural Science > 47201-Chemistry (S1) |
| Depositing User: | Hermansyah Hermansyah |
| Date Deposited: | 29 Aug 2020 12:37 |
| Last Modified: | 29 Aug 2020 12:37 |
| URI: | http://repository.unsri.ac.id/id/eprint/34139 |
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