Alginate/Phosphine-Functionalized Chitosan Beads Towards the Removal of Harmful Metal Ions from Aqueous Medium

Souza, Jaqueline F. de; Silva, Emilly C. da; Biajoli, André F. P.; Bonemann, Daisa Hakbart; Ribeiro, Emerson Schwingel; Fajardo, André R.

doi:10.1007/s10924-022-02599-8

Cited by 7 publications

(4 citation statements)

References 59 publications

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“…The pH variation (ΔpH = pH initial − pH final ) was plotted against the initial pH values, and the pH PZC was estimated by identifying the intersection point of the horizontal line at ΔpH = 0 with the plot. 21 Swelling Experiments. Swelling experiments were conducted to investigate the liquid uptake behavior of the printed Alg and Alg/ Biochar hydrogels.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…Subsequently, the final pH of each solution was measured again using a pH meter. The pH variation (ΔpH = pH initial – pH final ) was plotted against the initial pH values, and the pH PZC was estimated by identifying the intersection point of the horizontal line at ΔpH = 0 with the plot …”

Section: Methodsmentioning

confidence: 99%

“…This study proposes the manufacture of composite hydrogels composed of alginate and rice husk (RH) biochar using 3D printing as a strategy to create enhanced adsorbents for the removal of organic contaminants. As evident from the literature, both RH and RH ashes (RHA) have been directly employed as adsorbent materials for various contaminants. − Herein, we hypothesize that combining the alginate matrix with RH biochar can yield a high-performance adsorbent. Additionally, we successfully demonstrated the use of residual biomass to formulate a printable ink for the mass production of adsorbents through additive manufacturing.…”

Section: Introductionmentioning

confidence: 95%

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Recyclable 3D-Printed Composite Hydrogel Containing Rice Husk Biochar for Organic Contaminants Adsorption in Tap Water

Silva,

Soares,

Nörnberg

et al. 2023

ACS Appl. Polym. Mater.

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Water and wastewater treatment face significant challenges in removing organic contaminants, and the search for efficient processes and materials is crucial to reducing this issue. Herein, the design and manufacturing of 3D-printed composite hydrogels using a combination of alginate and rice husk biochar was proposed. These composite hydrogels were evaluated as adsorbents for removing ibuprofen (IBU) and methylene blue (MB) from tap water. Various characterization techniques, including FTIR, XRD, SEM, and BET analyses, confirmed the successful formation of the composite hydrogels. Also, the properties of the composite hydrogels, such as total porosity, cross-linking density, and swelling, were found to vary with the biochar content in the composite. Batch experiments demonstrated that the hydrogel containing 10% w/w biochar (Alg/Biochar10) has significant adsorption capacities for IBU (111.4 mg/g) and MB (214.6 mg/g). These values represented substantial increases of 48% (IBU) and 58% (MB) compared to the conventional hydrogel without biochar, highlighting the enhanced performance achieved by incorporating biochar into the composite. The adsorption kinetics of both IBU and MB followed the pseudo-first-order model, while the Freundlich isotherm model provided insights into the adsorption mechanism. Notably, the adsorption of MB on the composite hydrogel was particularly favorable due to electrostatic interactions between the adsorbent and the adsorbate. Furthermore, the composite hydrogel exhibited recyclability and reusability, as demonstrated through 20 reuse cycles, indicating its stability and practical applicability. In summary, the original 3D-printed composite hydrogels manufactured with the alginate/rice husk biochar ink showed great potential as adsorbent materials for organic removal from water and wastewater.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

See 1 more Smart Citation

Recyclable 3D-Printed Composite Hydrogel Containing Rice Husk Biochar for Organic Contaminants Adsorption in Tap Water

Silva,

Soares,

Nörnberg

et al. 2023

ACS Appl. Polym. Mater.

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“…It was reported that the percentage of Cd 2+ removal was 95% [21]. Moreover, recently Fajardo and coworkers [22] reported the fabrication of Alginate/Phosphine/CS beads for removal of Cd 2+ from water media. According to the results, the maximum adsorption capacity for Cd 2+ (78.20 mg g − 1 ) was calculated.…”

Section: Introductionmentioning

confidence: 99%

Mg Al-layered double hydroxide (LDH)-assisted multiwalled carbon nanotube (MWCNT) grafting on poly-2-aminothiazole (PAT) /chitosan (CS)-blend matrix for Cd2+ removal and 4-nitrophenol reduction

Rostami

Khodaei

2023

Preprint

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The present study evaluated the performance of multiwalled carbon nanotube (MWCNT)@MgAl-layered double hydroxide (LDH) nanoparticles loaded on poly-2 aminothiazole (PAT)/chitosan (CS) matrix to remove Cd2+ ions from aqueous solution. We created a new PAT-based adsorbent by mixing PAT and CS nanoparticles, and surface modification by MWCNT@LDHs. For preparing the adsorbent, first, the PAT surface was modified by CS as an excellent candidate with a large number of –OH functional groups for interfacial adhesion improvement of the composite and enhancing the adsorption of the polymer. Then, to the homogeneous distribution of MWCNT in the matrix (CS/PAT), the surface of the functionalized MWCNT (MWCNT-COOH) was covalently modified by LDHs. Finally, the nanocomposite (NC) films were fabricated by ultrasonication using various loadings (30–70 wt %) of MWCNT@LDH. The prepared films were labelled CP-30%, CP-50%, and CP-70%. By adding MWCNT@LDH to the matrix network, the removal efficiency was increased significantly compared to CS/PAT. The influence of heavy metal ion concentration, pH, temperature, adsorbent dosage, and contact time on the adsorption. The maximum absorption capacity of 1106.19 mg/g was measured for Cd2+. The pseudo-first-order kinetics (PFO) and the Langmuir model were selected as the best models for the adsorption process. Also, the NC was successfully tested for p-nitrophenol (p-NP) reduction in the presence of NaBH4. The reaction was nearly completed in 6 min. Studies showed that the fabricated NC could be reused for three consecutive cycles.

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Eco-friendly synthesis of biosorbent based in chitosan-activated carbon/zinc oxide nanoparticle beads for efficiency reduction of cadmium ions in wastewater

Makhlouf,

Bendjaballah,

Boukerche

et al. 2024

Biomass Conv. Bioref.

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Alginate/Phosphine-Functionalized Chitosan Beads Towards the Removal of Harmful Metal Ions from Aqueous Medium

Cited by 7 publications

References 59 publications

Recyclable 3D-Printed Composite Hydrogel Containing Rice Husk Biochar for Organic Contaminants Adsorption in Tap Water

Recyclable 3D-Printed Composite Hydrogel Containing Rice Husk Biochar for Organic Contaminants Adsorption in Tap Water

Mg Al-layered double hydroxide (LDH)-assisted multiwalled carbon nanotube (MWCNT) grafting on poly-2-aminothiazole (PAT) /chitosan (CS)-blend matrix for Cd2+ removal and 4-nitrophenol reduction

Eco-friendly synthesis of biosorbent based in chitosan-activated carbon/zinc oxide nanoparticle beads for efficiency reduction of cadmium ions in wastewater

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