Removal of triphenylmethane dyes by calcium carbonate–lentinan hierarchical mesoporous hybrid materials

Liu, Yan; Jiang, Yucheng; Hu, Mancheng; Zhai, Quan‐Guo

doi:10.1016/j.cej.2015.03.109

Cited by 24 publications

(5 citation statements)

References 31 publications

(30 reference statements)

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“…[49]: 500 mg of adsorbent in 523.3 mL of 1.5 × 10 −2 M dye in water for a contact time of 48 h, Ref. [52]: 30 mg of adsorbent was poured in 5 mL of 0.1 mM of dye under stirring for 420 min.…”

Section: Figures Schemes and Tablesmentioning

confidence: 99%

An Easy Synthesis for Preparing Bio-Based Hybrid Adsorbent Useful for Fast Adsorption of Polar Pollutants

et al. 2019

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For the first time, γ-Al2O3 and Bio-Based Substances (BBS) hybrids (A-BBS) were prepared through a simple electrostatic interaction occurring between alumina, used as a support, and BBS (Bio-Based Substance from composted biowastes) carrying positive and negative charges, respectively. We evaluated the optimal amount of BBS to be immobilized on the support and the stability of the resulting A-BBS in order to use this novel hybrid material as an adsorbent for the removal of polar pollutants. Characterization was carried out by X-Ray Diffraction (XRD) for evaluating the crystal structure of the support, Fourier transform infrared spectroscopy (FT-IR) to evidence the presence of BBS on the hybrid material, thermogravimetric analysis (TGA) to measure the thermal stability of the hybrid materials and quantify the BBS amount immobilized on the support, N2 adsorption at 77 K for the evaluation of the surface area and porosity of the systems, Zeta potential measurements to evaluate the effect of BBS immobilization on the surface charge of the particles and choose the substrates possibly interacting with them. Firstly, we tested the adsorption capability of three samples differently coated with BBS toward cationic species considering various adsorbate/adsorbent ratio. Crystal Violet (CV) was chosen as model pollutant to compare the performance of the hybrid materials with those of other materials described in the literature. The adsorption data were modeled by Langmuir and Freundlich adsorption isotherms. Then, we studied the adsorption capability of the developed material towards molecules with different structures; for this purpose, two contaminants of emerging concerns (carbamazepine and atenolol) were tested. The results indicate that A-BBS could be applied in wastewater treatment for the removal of a significant amount of polar species. In addition, a comparison with literature data concerning CV adsorption was carried out in order to evaluate the environmental impact of synthetic routes used to prepare different adsorbents.

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Section: Figures Schemes and Tablesmentioning

confidence: 99%

An Easy Synthesis for Preparing Bio-Based Hybrid Adsorbent Useful for Fast Adsorption of Polar Pollutants

et al. 2019

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“…erefore, the treatment of water contaminated by these chemicals is necessary both for the protection of the environment and for the reuse of these unconventional waters. In recent years, different techniques have been developed and tested to recover toxic substances from wastewaters before discharging into an aquatic environment, such as coagulation [6], advanced oxidation [7], photocatalytic degradation [8], ultrafiltration [9], ionexchange [10], electrochemical treatment [11], and adsorption [12][13][14][15]. Among various physicochemical processes, adsorption is a technique of choice due to its low cost, simple design, and reusability [16,17].…”

Section: Introductionmentioning

confidence: 99%

Preparation, Characterization, and Application of Metakaolin-Based Geopolymer for Removal of Methylene Blue from Aqueous Solution

Alouani

Alehyen

Achouri

et al. 2019

Journal of Chemistry

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Metakaolin-based geopolymers are aluminosilicate materials that can be used as cationic dye adsorbents in aqueous system treatment. Our aim in this paper is to study the ability of geopolymer powder produced from metakaolin and alkaline activators to act as an adsorbent to remove methylene blue (MB). The solid materials were systematically analyzed by X-ray fluorescence (XRF), X-ray diffraction (XRD), Fourier-transform infrared spectrometery (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and the point of zero charge. XRF, FTIR, XRD, SEM, and EDX analyses confirmed the formation of a geopolymer composite by geopolymerization reaction. The influence of various experimental factors such as geopolymer dosage, pH, initial dye concentration, contact time, and temperature was assessed. Adsorption isotherms were evaluated by Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich isotherms. Kinetics data were studied using pseudo-first-order, pseudo-second-order, and intraparticle diffusion models. The thermodynamic parameters, namely, Gibbs free energy (ΔG°), enthalpy (ΔH°), and entropy (ΔS°), were determined. The results indicated that the maximum decolorization was found in high pH values. The collected isotherm data were best fitted by the Langmuir isotherm, and the maximum adsorption capacity of dye onto the geopolymer was 43.48 mg/g. The experiment kinetics followed the pseudo-second-order kinetic models. The thermodynamic results demonstrated that the adsorption of the obtained material occurs spontaneously as an endothermic process. The results confirmed that the prepared adsorbent can be used for remediation of water contaminated by MB dye.

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“…However, due to either the high cost or the practical unfeasible those technologies, adsorption is considered to be the most promising and technically feasible method as for its relatively low cost, flexibility and simplicity of operation. Numerous studies on adsorption removal of dye from effluents have been witnessed recently (González et al, 2015;Lin et al, 2013;Liu et al, 2015;Nair and Vinu, 2016;Yao et al, 2015;Zhang et al, 2017). It has been reported that 3741 bio-sorption papers were published from the period of 2013 to the end of May 2016 worldwide based on search result from Web of Science (Liu and Lee, 2014).…”

Section: Introductionmentioning

confidence: 99%

Cellulose nanocrystal-reinforced keratin bioadsorbent for effective removal of dyes from aqueous solution

Song

et al. 2017

Bioresource Technology

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High-efficiency and recyclable three-dimensional bioadsorbents were prepared by incorporating cellulose nanocrystal (CNC) as reinforcements in keratin sponge matrix to remove dyes from aqueous solution. Adsorption performance of dyes by CNC-reinforced keratin bioadsorbent was improved significantly as a result of adding CNC as filler. Batch adsorption results showed that the adsorption capacities for Reactive Black 5 and Direct Red 80 by the bioadsorbent were 1201 and 1070mgg, respectively. The isotherms and kinetics for adsorption of both dyes on bioadsorbent followed the Langmuir isotherm model and pseudo-second order model, respectively. Desorption and regeneration experiments showed that the removal efficiencies of the bioadsorbent for both dyes could remain above 80% at the fifth recycling cycles. Moreover, the bioadsorbent possessed excellent packed-bed column operation performance. Those results suggested that the adsorbent could be considered as a high-performance and promising candidate for dye wastewater treatment.

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Removal of triphenylmethane dyes by calcium carbonate–lentinan hierarchical mesoporous hybrid materials

Cited by 24 publications

References 31 publications

An Easy Synthesis for Preparing Bio-Based Hybrid Adsorbent Useful for Fast Adsorption of Polar Pollutants

An Easy Synthesis for Preparing Bio-Based Hybrid Adsorbent Useful for Fast Adsorption of Polar Pollutants

Preparation, Characterization, and Application of Metakaolin-Based Geopolymer for Removal of Methylene Blue from Aqueous Solution

Cellulose nanocrystal-reinforced keratin bioadsorbent for effective removal of dyes from aqueous solution

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