Facile Preparation of Tannic Acid–Poly(vinyl alcohol)/Sodium Alginate Hydrogel Beads for Methylene Blue Removal from Simulated Solution

Hu, Tao; Liu, Qinze; Gao, Tingting; Dong, Kaijie; Wei, Gang; Yao, Jinshui

doi:10.1021/acsomega.8b00577

Cited by 111 publications

(73 citation statements)

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“…For Langmuir model, q m and b values were obtained as 833.33 mg/g and 0.0032 L/mg, respectively. The adsorption capacity for MB removal in this study was considerably higher than that of the many studies in the literature, which are shown in Table …”

Section: Resultscontrasting

confidence: 55%

Removal of methylene blue dye from aqueous solution by semi‐interpenetrating polymer network hybrid hydrogel: Optimization through Taguchi method

Yılmaz

Kaya

Deveci

2019

J. Polym. Sci. Part A: Polym. Chem.

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In this study, sodium humate/poly(acrylamide-comethacrylic acid)/kaolin semi-interpenetrating polymer network hybrid hydrogel was synthesized as an effective adsorbent for the removal of methylene blue. The morphological and structural properties, and swelling behavior in distilled water and various environments of hybrid hydrogel were investigated with different analyses and tests. The equilibrium swelling percent of hybrid hydrogel reached to 37,000% in 240 min. The parameters (agitation time, concentration, dose, temperature, and pH) affecting adsorption process for methylene blue were optimized using Taguchi method. The data obtained in optimum conditions were well fitted to Langmuir adsorption isotherm and maximum adsorption capacity was determined as 833. 33 mg/g. In the light of the results, the utilization of hybrid hydrogel with high swelling capacity is foreseen as a favored adsorbent in several separation processes.

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Section: Resultscontrasting

confidence: 55%

Removal of methylene blue dye from aqueous solution by semi‐interpenetrating polymer network hybrid hydrogel: Optimization through Taguchi method

Yılmaz

Kaya

Deveci

2019

J. Polym. Sci. Part A: Polym. Chem.

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“…Compared to the peaks of Au 4f, C 1s, O 1s, and Cu 2p in the AuNRs@Cu 2 O/rGO nanocomposite before adsorption, after removal of the MB dye, the AuNRs@Cu 2 O/rGO nanocomposite shows additional peaks at 164 and 400 eV attributed to the binding energies of ( Figure 6 c) S 2p and ( Figure 6 d) N 1s, respectively, which indicates that MB is adsorbed on the structure of the AuNRs@Cu 2 O/rGO nanocomposite. 41 The above results clearly confirm the adsorbate molecules of MB dye adsorbed onto the surface of the AuNRs@Cu 2 O/rGO nanocomposite adsorbent. Further, the morphology of the composite does not change before and after MB removal, as seen in the SEM image in Figure S3a,b , which indicates a strong interfacial contact between the rGO and Au@Cu 2 O core–shell NPs.…”

Section: Results and Discussionsupporting

confidence: 69%

Well-Designed Au Nanorod-Doped Cu₂O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye

et al. 2020

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To ensure environmental safety, the removal of organic pollutants has gained increasing attention globally. We have synthesized uniform Au nanorod (NR)-doped Cu 2 O core–shell nanocubes (CSNCs) via a seed-mediated route embedded on the surface of rGO sheets. The Au NRs@Cu 2 O/rGO nanocomposite was characterized using various techniques such as transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier-transform infrared (FT-IR) and Raman spectroscopies. The scanning TEM-energy-dispersive spectroscopy (STEM-EDS) elemental mapping of the AuNRs@Cu 2 O/rGO nanocomposite indicates that the Au NR (40 nm) is fully covered with the Cu 2 O particles (∼145 nm) as a shell. N 2 gas sorption analysis shows that the specific surface area of the composite is 205.5 m 2 /g with a mesoporous character. Moreover, incorporation of Au NRs@Cu 2 O CSNCs increases the nanogaps around the nanoparticles and suppresses the stacking/bundling of rGO, which significantly influences the pore size and increase the surface area. A batch adsorption experiment was carried out under various parameters, such as the effect of pH, contact time, temperature, initial dye concentration, and adsorbent dosage, for the removal of methylene blue (MB) in aqueous solution. The high surface area and mesoporosity can cause the adsorption capacity to reach equilibrium within 20 min with a 99.8% removal efficiency. Both kinetic and isotherm data were obtained and fitted very well with the pseudo-second-order kinetic and Langmuir isotherm model. The Langmuir isotherm revealed an excellent dye sorption capacity of 243.9 mg/g at 298 K. Moreover, after five adsorption cycles, the dye removal efficiency decreased from 99 to 86%. This novel route paves a new path for heterogeneous adsorbent synthesis, which is useful for catalysis and electrochemical applications.

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“…For instance, Mahmoodi et al 40 developed PVA-chitosan nanofiber and reported its ability to remove anionic dye such as Direct Red and Reactive Red from water. Recently, Hu and coworker 41 developed tannic acid/PVA/sodium alginate hydrogel bead which exhibit excellent adsorption power (adsorption capacity: 147.06 mg/g) for methylene blue. Kloster et al 42 reported that chitosan/iron oxide films could be a potential adsorbent for Congo red and possess sorption capacity of 700 mg/g.…”

Section: Introductionmentioning

confidence: 99%

Removal of anionic dye Congo red from aqueous environment using polyvinyl alcohol/sodium alginate/ZSM-5 zeolite membrane

Radoor

Karayil²,

Parameswaranpillai

et al. 2020

Sci Rep

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In this study, a novel PVA/SA/ZSM-5 zeolite membrane with good regeneration capacity was successfully prepared by solvent casting technique. The properties of the membranes were assessed by employing different characterization techniques such as X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), optical microscopy (OP), thermogravimetric analysis (TGA), contact angle and universal testing machine (UTM). XRD, TGA and UTM results revealed that the crystallinity and thermo-mechanical performance of the membrane could be tuned with zeolite content. The successful incorporation of zeolite into the polymer matrix was confirmed by FT-IR, SEM and OP analysis. The adsorption ability of the as-prepared membrane was evaluated with a model anionic dye, Congo red. Adsorption studies show that the removal efficiency of the membrane could be tuned by varying zeolite content, initial concentration of dye, contact time, pH and temperature. Maximum dye adsorption (5.33 mg/g) was observed for 2.5 wt% zeolite loaded membrane, at an initial dye concentration of 10 ppm, pH 3 and temperature 30 °C. The antibacterial efficiency of the membrane against gram-positive (Staphylococcus aureus) and gram-negative bacteria (Escherichia coli) was also reported. The results show that membrane inhibits the growth of both gram-positive and gram-negative bacteria. The adsorption isotherm was studied using two models: Langmuir and Freundlich isotherm. The results show that the experimental data fitted well with Freundlich isotherm with a high correlation coefficient (R2 = 0.998). Meanwhile, the kinetic studies demonstrate that pseudo-second-order (R2 = 0.999) model describe the adsorption of Congo red onto PVA/SA/ZSM-5 zeolite membrane better than pseudo-first-order (R2 = 0.972) and intra particle diffusion model (R2 = 0.91). The experimental studies thus suggest that PVA/SA/ZSM-5 zeolite could be a promising candidate for the removal of Congo red from aqueous solution.

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Facile Preparation of Tannic Acid–Poly(vinyl alcohol)/Sodium Alginate Hydrogel Beads for Methylene Blue Removal from Simulated Solution

Cited by 111 publications

References 50 publications

Removal of methylene blue dye from aqueous solution by semi‐interpenetrating polymer network hybrid hydrogel: Optimization through Taguchi method

Removal of methylene blue dye from aqueous solution by semi‐interpenetrating polymer network hybrid hydrogel: Optimization through Taguchi method

Well-Designed Au Nanorod-Doped Cu₂O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye

Removal of anionic dye Congo red from aqueous environment using polyvinyl alcohol/sodium alginate/ZSM-5 zeolite membrane

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Facile Preparation of Tannic Acid–Poly(vinyl alcohol)/Sodium Alginate Hydrogel Beads for Methylene Blue Removal from Simulated Solution

Cited by 111 publications

References 50 publications

Removal of methylene blue dye from aqueous solution by semi‐interpenetrating polymer network hybrid hydrogel: Optimization through Taguchi method

Removal of methylene blue dye from aqueous solution by semi‐interpenetrating polymer network hybrid hydrogel: Optimization through Taguchi method

Well-Designed Au Nanorod-Doped Cu2O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye

Removal of anionic dye Congo red from aqueous environment using polyvinyl alcohol/sodium alginate/ZSM-5 zeolite membrane

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Well-Designed Au Nanorod-Doped Cu₂O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye