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AuthorEl-Azazy, Marwa
AuthorDimassi, Sarra N.
AuthorEl-Shafie, Ahmed S.
AuthorIssa, Ahmed A.
Available date2020-04-01T09:45:57Z
Publication Date2019
Publication NameApplied Sciences (Switzerland)
ResourceScopus
CitationEl-Azazy, M., Dimassi, S. N., El-Shafie, A. S., & Issa, A. A. (2019). Bio-waste Aloe vera leaves as an efficient adsorbent for titan yellow from wastewater: Structuring of a novel adsorbent using Plackett-Burman factorial design. Applied Sciences, 9(22), 4856.
ISSN20763417
URIhttp://dx.doi.org/10.3390/app9224856
URIhttp://hdl.handle.net/10576/13713
AbstractTitan yellow (TY), a triazene azo dye, was removed from contaminated wastewater samples using a green adsorbent recycled from Aloe vera leaves (AV) waste. Two adsorbents were developed-air-dried Aloe vera (ADAV) and thermally treated Aloe vera (TTAV). Adsorption efficacy of both adsorbents was assessed in terms of percent removal (%R) of TY and adsorption capacity (qe). ADAV had a better performance compared to TTAV. Plackett-Burman design (PBD) was exploited to establish the experimental pattern of the study. Four variables were studied: pH, adsorbent dose (AD), dye concentration (DC), and stirring time (ST). Analysis of variance (ANOVA) at 95.0 confidence interval (CI), control, and quality charts helped establish regression model(s). Characterization of both adsorbents was performed using FT-IR/Raman spectroscopy together with TGA/dTGA and SEM/energy dispersive X-ray spectroscopy (EDX) analyses. Textural properties were determined using nitrogen adsorption isotherms at 77 K. Results showed that the surface areas of ADAV and TTAV300 were 3.940 and 7.076 m2/g, respectively. Raman analysis showed that the TTAV had clear Dand G-bands. Equilibrium studies revealed that data were well fitted to Freundlich isotherm with a maximum adsorption capacity of 55.25 mg/g using Langmuir equation, and the adsorption was physisorption. Adsorption followed a pseudo-second order that occurred in two steps-diffusion and then adsorption. - 2019 by the authors.
SponsorThe project members would like to extend their special thanks to the Central Lab Unit (CLU) at the Qatar University. This work was made possible by Qatar University Internal Student Grant [QUST-2-CAS-2019-18] from Qatar University. The statements made herein are solely the responsibility of the authors. The publication of this article was funded by the Qatar National Library
Languageen
PublisherMDPI AG
Subject%removal and adsorption capacity (qe)
Aloe vera (AV) leaves
Characterization
Equilibrium
Kinetics
Plackett-Burman Design (PBD)
Titan yellow (TY)
TitleBio-Waste Aloe vera Leaves as an efficient adsorbent for Titan Yellow from Wastewater: Structuring of a novel adsorbent using Plackett-Burman factorial design
TypeArticle
Issue Number22
Volume Number9
dc.accessType Open Access


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