Efficient regeneration/reuse of graphene oxide as a nanoadsorbent for removing basic Red 46 from aqueous solutions

Shoushtarian, Farshid; Moghaddam, Mohammad Reza Alavi; Kowsari, Elaheh

doi:10.1016/j.molliq.2020.113386

Cited by 41 publications

(7 citation statements)

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“…The regeneration experimental results revealed that maximum 56.20 % desorption was achieved [60] . So does on Red 46 dyes adsorbed on GO [61] . Contrastively, the desorption efficiency of V(IV) adsorbed on poly‐modified hydrogel is 77.8 % after five cycles, [18] and that of V(V) adsorbed on ferric oxide‐hydroxide‐activated carbon is over 85 % after the 4 th cycle [22] .…”

Section: Resultsmentioning

confidence: 96%

“…[60] So does on Red 46 dyes adsorbed on GO. [61] Contrastively, the desorption efficiency of V(IV) adsorbed on poly-modified hydrogel is 77.8 % after five cycles, [18] and that of V(V) adsorbed on ferric oxide-hydroxide-activated carbon is over 85 % after the 4 th cycle. [22] In the future, to achieve better recycling properties, GO should be modified with proper functionalities to maintain a thin layer structure of GO and avoid the stacking of GO sheets.…”

Section: Recycling Of the Go Adsorbentmentioning

confidence: 95%

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Removal of Vanadium(IV) Ions from Aqueous Solution by Graphene Oxide

et al. 2022

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Vanadium is a long-confined contaminant. In this study, graphene oxide (GO) was synthesized by the modified Hummers' method and used to remove vanadium(IV). The adsorption isotherms and kinetics of vanadium(IV) on GO at pH 2.5 and three temperatures are measured in batch experiments. The influences of ionic strength is investigated and the regeneration of GO is evaluated by washing with HCl. The results show that the adsorption isotherm corresponds to Temkin model with an adsorption capacity of 70.56 mg/g at 298 K, while the kinetic process coincides with pseudo-secondorder model and approaches to equilibrium in 6 h. The adsorption capacity of GO is not influenced by Na + ionic strength, but sharply inhibited by Ca 2 + . The superior adsorption is dominated by electrostatic interaction, coordination bonding, and hydrogen bonding. Moreover, the GO is reusable, as shown by maintaining 53.4 % of the initial efficacy after five sequential adsorption-desorption cycles.

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Section: Resultsmentioning

confidence: 96%

Section: Recycling Of the Go Adsorbentmentioning

confidence: 95%

Removal of Vanadium(IV) Ions from Aqueous Solution by Graphene Oxide

et al. 2022

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“…Comparison of the adsorption capacities of the C/SiO 2 composite with those of other adsorbents [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ] used for BR46 removal allows us to conclude that it can be considered as an adsorptive material on an industrial scale in a wastewater treatment plant containing BR46 ( Table 2 ).…”

Section: Resultsmentioning

confidence: 99%

C.I. Basic Red 46 Removal from Sewage by Carbon and Silica Based Composite: Equilibrium, Kinetic and Electrokinetic Studies

et al. 2022

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The worldwide production of colored products and intermediates is increasing year on year. The consequence of this is an increase in the number of liquid effluents containing toxic dyes entering the aquatic environment. Therefore, it is extremely important to dispose of them. One of the techniques for the elimination of environmentally harmful dyes is adsorption. The main purpose of this study was to explore the possibility of using a carbon and silica (C/SiO2)-based composite for the removal of the azo dye C.I. Basic Red 46 (BR46). The adsorption capacity of C/SiO2 was found to be temperature dependent and increased from 41.90 mg/g to 176.10 mg/g with a temperature rise from 293 K to 333 K in accordance with the endothermic process. The Langmuir isotherm model seems to be the better one for the description of experimental data rather than Freundlich or Dubinin–Radushkevich. The free energy (ΔGo) confirmed the spontaneous nature of BR46 adsorption by C/SiO2. Kinetic parameters revealed that BR46 uptake followed the pseudo-second-order equation; however, the external diffusion plays a significant role. Surfactants of cationic, anionic and non-ionic type influenced BR46 retention by C/SiO2. The electrokinetic results (solid surface charge density and zeta potential) indicated that the adsorption of cationic dye and surfactant influences the structure of the electrical double layer formed at the solid–liquid interface.

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“…FT-IR spectroscopy of GO and GO-VI/TBP cobalt complex is presented in cm -1 and 1225 cm -1 , respectively [37,38]. bands in the range of 571-733 cm -1 represent the fingerprint area in the GO-VI/TBP cobalt complex spectra.…”

Section: Characterization Of Go and Go-vi/tbp Cobalt Complexmentioning

confidence: 99%