Removal of Congo red dyes from aqueous solutions by porous γ-alumina nanoshells

Al‐Salihi, Sara; Jasim, Ahmed M.; Cortalezzi, María Marta Fidalgo de; Xing, Yangchuan

doi:10.1016/j.chemosphere.2021.131769

Cited by 61 publications

(22 citation statements)

References 58 publications

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“…When the CR dye concentration increased from 50 to 250 mg/L at 25 °C, the adsorption capacity of the CS-HAP-CeO 2 adsorbent increased from 121.87 to 289.21 mg/g. The increase in the driving force for mass transfer from solution to the CS-HAP-CeO 2 heterostructure adsorbent surface results in prominent increase in adsorption capacity at higher initial concentrations [ 47 , 48 , 49 ]. It was perceived that when the temperature rises, the adsorption capacity decreased marginally, indicating that the CR dye adsorption was an exothermic process.…”

Section: Resultsmentioning

confidence: 99%

Chitosan-Functionalized Hydroxyapatite-Cerium Oxide Heterostructure: An Efficient Adsorbent for Dyes Removal and Antimicrobial Agent

et al. 2022

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The current research intended to employ a facile and economical process, which is also ecofriendly to transform camel waste bones into novel heterostructure for cleansing of diverse waste waters. The bones of camel were utilized for preparation of hydroxyapatite by hydrothermal method. The prepared hydroxyapatite was applied to the synthesis of cerium oxide-hydroxyapatite coated with natural polymer chitosan (CS-HAP-CeO2) heterostructure. Being abundant natural polymer polysaccharide, chitosan possesses exceptional assets such as accessibility, economic price, hydrophilicity, biocompatibility as well as biodegradability, therefore style it as an outstanding adsorbent for removing colorant and other waste molecules form water. This heterostructure was characterized by various physicochemical processes such as XRD, SEM-EDX, TEM, and FT-IR. The CS-HAP-CeO2 was screened for adsorption of various industrially important dyes, viz., Brilliant blue (BB), Congo red (CR), Crystal violet (CV), Methylene blue (MB), Methyl orange (MO), and Rhodamine B (RB) which are collective pollutants of industrial waste waters. The CS-HAP-CeO2 demonstrated exceptional adsorption against CR dye. The adsorption/or removal efficiency ranges are BB (11.22%), CR (96%), CV (28.22%), MB (47.74%), MO (2.43%), and RB (58.89%) dyes. Moreover, this heterostructure showed excellent bacteriostatic potential for E. coli, that is liable for serious waterborne diseases. Interestingly, this work revealed that the incorporation of cerium oxide and chitosan into hydroxyapatite substantially strengthened antimicrobial and adsorption capabilities than those observed in virgin hydroxyapatite. Herein, we recycled the unwanted camel bones into a novel heterostructure, which assists to reduce water pollution, mainly caused by the dye industries.

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Section: Resultsmentioning

confidence: 99%

Chitosan-Functionalized Hydroxyapatite-Cerium Oxide Heterostructure: An Efficient Adsorbent for Dyes Removal and Antimicrobial Agent

et al. 2022

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“…where k2 (g mg -1 min -1 ) is a rate constant of the pseudo-second-order kinetic model, and Qe and Qt (mg g -1 ) are the amount of Cu adsorbed per unit mass of the nano alumina samples at the equilibrium and time t, respectively. Q e can be calculated using the following equation 18 :…”

Section: Copper Adsorption Experimentsmentioning

confidence: 99%

“…Also, Mahdavi et al 14 , Amin et al 15 , and Shojaei Bahabad et al 16 have established nano alumina to remove some heavy metals such as Pb(II), Cu(II), Cd(II), and Ni(II) from aqueous solutions. Huimin Zhang et al 17 and Sara Al-Salihi et al 18 have also used the nano alumina to remove Congo red dye from water. Therefore, nano alumina is accepted as an excellent nanostructure for water treatment.Alumina can be synthesized in several metastable transition phases depending on the preparation method as well as synthesis parameters like stirring times, calcination temperature, precursor, solution pH, and else.…”

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High Specific Surface Area γ-Al2O3 Nanoparticles Synthesized by Facile and Low-cost Co-precipitation Method

Gholizadeh

Aliannezhadi

Ghominejad

et al. 2022

Preprint

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Alumina (Al2O3) nanoparticles (NPs) are particularly adsorbent NPs with a high specific surface area (SSA) that may well be utilized to clean water. In this study, pure γ-alumina NPs are successfully synthesized by the co-precipitation method, and the effect of ammonium bicarbonate concentration on the synthesized NPs is studied to find the optimum concentration to provide the highest capacity of copper ions removal from water. The results declare that spherical alumina NPs with average diameters in the range of 19–23 nm are formed with different concentrations of precipitation agent, and the concentration has no significant effect on the morphology of NPs. Furthermore, the precipitating agent concentration influences the optical characteristics of the produced alumina NPs, and the bandgap energies of the samples vary between 4.24 and 5.05 eV. The most important impact of precipitating agent concentrations reflects in their SSA and the capacity of copper ion removal. Ultra-high SSA = 317 m2/g and the highest copper removal are achieved in an alkalis solution followed by a neutral solution. However, admirable copper removal of 98.2% is even achieved in acidic solutions with a given concentration of ammonium bicarbonate, so this sample can be a good candidate for Cu ions removal from acidic water.

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“…For many decades, adsorption process has been the most famous and most used wastewater treatment technique for removing aqueous pollutants 33 – 35 . Recently, the removal of CR 36 , 37 , BG 38 , 39 , MB 40 , 41 , and MR 42 , 43 from colored aqueous solution was conducted successfully. PA-12 is new in the area of environmental science.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of polyamide-12/cement nanocomposite and its testing for different dyes removal from aqueous solution: characterization, adsorption, and regeneration studies

Aldahash

Higgins

Siddiqui

et al. 2022

Sci Rep

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Polyamide-12/Portland cement nanocomposite was prepared by using the exfoliated adsorption method. The fabricated nanocomposite was applied first time to remove Congo red (CR), brilliant green (BG), methylene blue (MB), and methyl red (MR) from the synthetic wastewater. The polymer nanocomposite was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, elemental mapping, Brunauer–Emmett–Teller surface area analysis, and X-ray diffraction. The adsorption was rapid and all the studied dyes were absorbed on the surface of the polymer nanocomposite in 90 min. The point of zero charge was found at pH 5 and the factors such as pH, time, and temperature were found to affect the adsorption efficiency. Freundlich isotherm and pseudo-second-order models well-fitted the adsorption isotherm and kinetics data, respectively. The calculated maximum adsorption capacity was 161.63, 148.54, 200.40, and 146.41 mg/g for CR, BG, MB, and MR, respectively. The mode of the adsorption process was endothermic, spontaneous, and physical involving electrostatic attraction. On an industrial scale, the high percentage of desorption and slow decrease in the percentage of adsorption after every five regeneration cycles confirm the potential, practicality, and durability of the nanocomposite as a promising and advanced adsorbent for decolorization of colored wastewater.

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Removal of Congo red dyes from aqueous solutions by porous γ-alumina nanoshells

Cited by 61 publications

References 58 publications

Chitosan-Functionalized Hydroxyapatite-Cerium Oxide Heterostructure: An Efficient Adsorbent for Dyes Removal and Antimicrobial Agent

Chitosan-Functionalized Hydroxyapatite-Cerium Oxide Heterostructure: An Efficient Adsorbent for Dyes Removal and Antimicrobial Agent

High Specific Surface Area γ-Al2O3 Nanoparticles Synthesized by Facile and Low-cost Co-precipitation Method

Fabrication of polyamide-12/cement nanocomposite and its testing for different dyes removal from aqueous solution: characterization, adsorption, and regeneration studies

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