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Application of surfactant-modified zeolite-activated carbons as adsorbents to a semi-batch operation
dc.creator | Ioannou Z., Karasavvidis C., Molla A., Dimirkou A. | en |
dc.date.accessioned | 2023-01-31T08:28:38Z | |
dc.date.available | 2023-01-31T08:28:38Z | |
dc.date.issued | 2018 | |
dc.identifier | 10.5004/dwt.2018.21934 | |
dc.identifier.issn | 19443994 | |
dc.identifier.uri | http://hdl.handle.net/11615/74057 | |
dc.description.abstract | Modified zeolite-activated carbons (H-CL-CB1, H-CL-CB2) in a proportion of 50/50 w/w and 20/80 w/w were used for methylene blue removal from aqueous solutions under a semi-batch operation. Dye adsorption kinetic analysis was also studied for H-CL-CB1, H-CL-CB2, modified zeolite (H-CL), commercial activated carbon (CB), hematite (HM) and clinoptilolite (CL). Equilibrium isotherms and thermodynamic analysis of dye were studied for H-CL-CB1, H-CL-CB2, CB, CL, H-CL and HM under a batch operation at 20°C, 40°C and 60°C. The physical and chemical properties of all adsorbents were characterized through Fourier transform infrared spectroscopy, Brunauer–Emmett–Teller analysis and the point of zero charge. The maximum methylene blue removal (99% and 96%) on different modified zeolite-activated carbons (50/50 w/w and 20/80 w/w) was achieved after 57 and 130 min, respectively. Dye adsorption process onto H-CL and H-CL-CB1 (50/50 w/w) was found to be controlled by chemisorption while onto CB and H-CL-CB2 (20/80 w/w) by film diffusion. Isotherm studies have shown that dye adsorption data on CL, H-CL, H-CL-CB1 and H-CL-CB2 were best described by Freundlich isotherm while on HM and CB by Langmuir isotherm. According to thermodynamic study, the negative values of ∆G° indicate that dye adsorption process was favorable. The positive values of ∆H° indicate endothermic nature of adsorption. Zeolite-carbon adsorbents can be used as filters to remove organic compounds from wastewaters. © 2018 Desalination Publications. All rights reserved. | en |
dc.language.iso | en | en |
dc.source | Desalination and Water Treatment | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85055571978&doi=10.5004%2fdwt.2018.21934&partnerID=40&md5=da4b5a866e44c37eedbcfed9e5c3dee0 | |
dc.subject | activated carbon | en |
dc.subject | adsorption | en |
dc.subject | aqueous solution | en |
dc.subject | hematite | en |
dc.subject | reaction kinetics | en |
dc.subject | surfactant | en |
dc.subject | zeolite | en |
dc.subject | Desalination Publications | en |
dc.title | Application of surfactant-modified zeolite-activated carbons as adsorbents to a semi-batch operation | en |
dc.type | journalArticle | en |
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