scholarly journals Novel Sodium Alginate/Polyvinylpyrrolidone/TiO2 Nanocomposite for Efficient Removal of Cationic Dye from Aqueous Solution

2021 ◽  
Vol 11 (19) ◽  
pp. 9186
Author(s):  
Noha A. Elessawy ◽  
Marwa H. Gouda ◽  
Mohamed S. Elnouby ◽  
Hoda F. Zahran ◽  
Aly Hashim ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Sodium Alginate ◽  
Weight Ratio ◽  
Calcium Chloride Solution ◽  
Blue Dye ◽  
Efficient Removal ◽  
Effective Technique ◽  
Illumination Time ◽  
Dye Decomposition ◽  
Porous Beads

The combination of adsorption and photodegradation processes is an effective technique for the removal of dye contaminants from water, which is motivating the development of novel adsorbent-photocatalyst materials for wastewater treatment. Herein, novel nanocomposite porous beads were developed using titanium dioxide (TiO2) nanotubes embedded in a sodium alginate (SA)/polyvinylpyrrolidone (PVP) matrix using calcium chloride solution as a crosslinker. The prepared nanocomposite beads’ performance was examined as an adsorbent-photocatalyst for the breakdown of methylene blue in aqueous solutions. Several operation factors influencing the dye decomposition process, including photocatalyst dosage, illumination time, light intensity, and stability were investigated. The findings demonstrated that the removal activity of the beads changed with the TiO2 weight ratio in the composite. It was found that SA/PVP/TiO2-3 nanocomposite beads presented the greatest deterioration efficiency for methylene blue dye (98.9%). The cycling ability and reusability of the prepared SA/PVP/TiO2 nanocomposite beads recommend their use as efficient, eco-friendly materials for the treatment of wastewaters contaminated with cationic dyes.

scholarly journals Effect of the Morphology of Tungsten Oxide Embedded in Sodium Alginate/Polyvinylpyrrolidone Composite Beads on the Photocatalytic Degradation of Methylene Blue Dye Solution

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1905 ◽  
Author(s):  
Eman M. Elsayed ◽  
Mohamed S. Elnouby ◽  
M. H. Gouda ◽  
Noha A. Elessawy ◽  
D. M. F. Santos
Keyword(s):  
Methylene Blue ◽  
Acid Solution ◽  
Tungsten Oxide ◽  
Sodium Alginate ◽  
Hydrothermal Treatment ◽  
Dye Degradation ◽  
Tungstic Acid ◽  
Blue Dye ◽  
Spherical Form ◽  
Illumination Time

Tungsten oxide nanostructures were modified by oxygen vacancies through hydrothermal treatment. Both the crystalline structure and morphological appearance were completely changed. Spherical WO3·H2O was prepared from tungstic acid solution by aging at room temperature, while rod-like WO3·0.33H2O was prepared by hydrothermal treatment of tungstic acid solution at 120 °C. These structures embedded in sodium alginate (SA)/polyvinylpyrrolidone (PVP) were synthesized as novel porous beads by gelation method into calcium chloride solution. The performance of the prepared materials as photocatalysts is examined for methylene blue (MB) degradation in aqueous solutions. Different operation parameters affecting the dye degradation process, such as light intensity, illumination time, and photocatalyst dosage are investigated. Results revealed that the photocatalytic activity of novel nanocomposite changed with the change in WO3 morphology. Namely, the beads with rod nanostructure of WO3 have shown better effectiveness in MB removal than the beads containing WO3 in spherical form. The maximum degradation efficiency was found to be 98% for WO3 nanorods structure embedded beads, while the maximum removal of WO3 nanospheres structure embedded beads was 91%. The cycling-ability and reuse results recommend both prepared structures to be used as effective tools for treating MB dye-contaminated wastewaters. The results show that the novel SA/PVP/WO3 nanocomposite beads are eco-friendly nanocomposite materials that can be applied as photocatalysts for the degradation of cationic dyes in contaminated water.

scholarly journals Application of Sulfonated GMA-g-non Woven PE Fabric for the Efficient Removal of Methylene Blue Dye from Wastewater

2021 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Md. Sohel Rana ◽  
Nazia Rahman ◽  
Tofail Ahmed Chowdhury ◽  
Nirmal Chandra Dafader ◽  
Shahnaz Sultana ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Efficient Removal

Efficient removal of methylene blue dye from an aqueous solution using silica nanoparticles cross-linked acrylamide polymer hydrogels

2021 ◽  
Author(s):  
M. Maria Rahman ◽  
Jannat Al Foisal ◽  
Hirotaka Ihara ◽  
Makoto Takafuji
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Silica Nanoparticles ◽  
Human Health ◽  
Blue Dye ◽  
Aquatic Environments ◽  
Methylene Blue Dye ◽  
Efficient Removal ◽  
Polymer Hydrogels ◽  
Harmful Effects

The removal of the toxic dyes from textile effluents has become a great concern due to their harmful effects on aquatic environments as well as human health. Here, we report...

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