Sodium alginate nanocomposite based efficient system for the removal of organic and inorganic pollutants from wastewater

Bakhsh, Esraa M.; Akhtar, Kalsoom; Fagieh, Taghreed M.; Asiri, Abdullah M.; Khan, Sher Bahadar

doi:10.1016/j.ijbiomac.2021.09.029

Cited by 34 publications

(17 citation statements)

References 35 publications

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“…The effect of different parameters such as catalyst amount, reducing agent amount, and reusability was checked to optimize the method toward reduction of the most selective dye based on the study. The effectiveness of Cu@Alg/Co–CeO 2 was assessed by Equation (1) [ 42 ]:

where C o is the initial concentration/absorbance, and C t is the concentration/absorbance at time ( t ) of each individual pollutant.…”

Section: Methodsmentioning

confidence: 99%

“…Metal-based nanomaterials have been given significant attention in different applications, especially their high efficiency in catalysis [ 37 , 38 , 39 , 40 , 41 ]. In a previous study, a metal oxide nanocatalyst was found to be highly selective, as it showed greater effectiveness in reducing potassium hexacyanoferrate (K 3 [Fe(CN) 6 ]) [ 42 ]. Currently, new treatment technologies for dyes are needed, which can clear dyes from wastewater and minimize the exposure of toxic chemicals to humans and the environmental system [ 43 ].…”

Section: Introductionmentioning

confidence: 99%

“…Such materials have shown exceptional characteristics in several applications, especially in reducing and degrading water pollutants. Doping by metals participates in regulating the electronic and catalytic properties of the catalyst and elevating surface area, thus enhancing its catalytic characteristics [ 35 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

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Copper Nanoparticles Decorated Alginate/Cobalt-Doped Cerium Oxide Composite Beads for Catalytic Reduction and Photodegradation of Organic Dyes

et al. 2022

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Cobalt-doped cerium oxide (Co–CeO2) was synthesized and wrapped inside alginate (Alg) hydrogel beads (Alg/Co–CeO2). Further, copper nanoparticles (Cu) were grown on Alg/Co–CeO2 beads. Cu decorated Alg/Co–CeO2 composite beads (Cu@Alg/Co–CeO2) were tested as a catalyst for the solar-assisted photodegradation and NaBH4-assisted reduction of organic pollutants. Among different dyes, Cu@Alg/Co–CeO2 was found to be the best catalyst for the photodegradation of acridine orange (ArO) under solar light and efficient in reducing methyl orange (MO) with the aid of NaBH4. Cu@Alg/Co–CeO2 decolorized ArO up to 75% in 5 h under solar light, while 97% of MO was reduced in 11 min. The decolorization efficiency of Cu@Alg/Co–CeO2 was further optimized by varying different parameters. Thus, the designed catalyst provides a promising way for efficient oxidation and reduction of pollutants from industrial effluents.

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where C o is the initial concentration/absorbance, and C t is the concentration/absorbance at time ( t ) of each individual pollutant.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Copper Nanoparticles Decorated Alginate/Cobalt-Doped Cerium Oxide Composite Beads for Catalytic Reduction and Photodegradation of Organic Dyes

et al. 2022

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“…The characteristic property of biopolymer hydrogels is the porosity having unified network of holes and voids (pores). [35,36] We have selected chitosan crosslinked using formaldehyde. Crosslinking is a workable way to make hydrogel where NH 2 group of chitosan has electrostatic interaction with formaldehyde to make hydrogel.…”

Section: Introductionmentioning

confidence: 99%

“…One of the effective ways of dealing with these pollutants is to catalytically reduce them to generate comparatively safer products. [ 35,39 ] Therefore, a novel catalytic system based on hydrogel container where metal nanoparticles were entrapped in chitosan hydrogel was prepared. After dispersing the metal within the chitosan aqueous solution, it was crosslinked by the formaldehyde solution.…”

Section: Introductionmentioning

confidence: 99%

Chitosan hydrogel wrapped bimetallic nanoparticles based efficient catalysts for the catalytic removal of organic pollutants and hydrogen production

Bakhsh

Khan

Akhtar

et al. 2022

Applied Organom Chemis

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A novel catalytic system based on bimetallic nanoparticles entrapped chitosan hydrogel container (Cu–Ag/CH, Cu–Co/CH, Cu–Ni/CH) was prepared. The developed catalytic system was applied for production of H2 from water and methanol and reduction of 4‐nitrophenol (4‐NP), 3‐nitrophenol, 2‐nitrophenol, 2,6‐dinitrophenol, methylene blue, congo red (CR), methyl orange, acridine orange, and potassium ferricynide (K3[Fe(CN)6]). The developed catalytic system has shown tremendous performance and exhibited high efficiency as a catalyst for water treatment and H2 generation. Among all the nanocatalysts, Cu–Co/CH was more efficient in catalytic H2 generation while Cu–Ni/CH was more efficient in catalytic reduction of toxic contaminants. Further, various parameters like amount of NaBH4, catalyst quantity, pollutant concentration, and temperature were optimized to enhance the effectiveness of catalytic system for fast production of H2 and reduction of toxins. Moreover, the recyclability of the catalyst was investigated, where slight decrease in reduction time was noted.

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Polyurethane‐based nanocomposite for catalytic reduction of toxic dyes

Naseem,

Abrar,

Haider

et al. 2024

Polymers for Advanced Techs

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In this work, we prepared AuNPs loaded polyurethane‐sodium alginate (Au‐PU‐ALg) composite polymers by casting and in‐situ reduction method. Successful fabrication of AuNPs was confirmed by UV–visible, Fourior transform infrared (FTIR) spectroscopy, X‐ray diffraction (XRD), field emission scanning elcetron microscopy (FESEM), and energy dispersive X‐ray (EDX) analysis along with the change in color of the suspension from yellow to dark purple. Thermo‐gravimetric analysis (TGA) also confirmed the loading of 7.44 % AuNPs of total nanocomposite contents. The catalytic activity of Au‐PU‐ALg nanocomposites was checked by reducing Rhodamine B (RhB) as a model reaction. It was seen that reduction of RhB was successfully done in the presence of NaBH4 and Au‐PU‐ALg nanocomposite in just 8 min with value of kapp found as 0.648 min−1. While the value of kapp for RhB reduction was found as 0.0008, 0.00221, and 0.0008 min−1 in the presence of catalyst, NaBH4 and polymer gel particles, respectively. Thus results show that the value of kapp for the reduction of RhB in the presence of NaBH4 and catalyst was found high as compared to the controlled reactions. Complex mixture of dyes such as RhB, crystal violet (CV), Congo red (CR), and dyes polluted industrial wastewater was become colorless in 10 and 3 min, respectively on mixing with catalyst and reducing agent. It was also observed that reduction of RhB followed pseudo first order kinetic model and Langmuir Hinshelwood mechanism.

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Sodium alginate nanocomposite based efficient system for the removal of organic and inorganic pollutants from wastewater

Cited by 34 publications

References 35 publications

Copper Nanoparticles Decorated Alginate/Cobalt-Doped Cerium Oxide Composite Beads for Catalytic Reduction and Photodegradation of Organic Dyes

Copper Nanoparticles Decorated Alginate/Cobalt-Doped Cerium Oxide Composite Beads for Catalytic Reduction and Photodegradation of Organic Dyes

Chitosan hydrogel wrapped bimetallic nanoparticles based efficient catalysts for the catalytic removal of organic pollutants and hydrogen production

Polyurethane‐based nanocomposite for catalytic reduction of toxic dyes

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