Alginate/Banana Waste Beads Supported Metal Nanoparticles for Efficient Water Remediation

Abstract

Water pollution is considered a perilous issue that requires an immediate solution. This is largely because of the strong correlation between the global population increase and the amount of waste produced (most notably food waste). This project prompts the conversion of food waste into useful materials that can be used with sodium alginate as a catalytic support for metal nanoparticles. Sodium alginate/banana peel (Alg/BP) beads were prepared simply using an eco-friendly method. The prepared materials were modified using nanostructured materials to enhance their characteristics. Alg/BP beads were employed as adsorbents for metals that were then treated with sodium borohydride to produce MNPs@Alg/BP. Different MNPs@Alg/BP (MNPs = Ag, Ni, Co, Fe, and Cu) were used as catalysts for reducing 4-nitrophenol (4-NP) by NaBH4 to evaluate each catalyst performance in a model reaction. The results exhibited that Cu@Alg/BP was most efficient toward complete transformation of 4-NP. Therefore, Cu@Alg/BP was also used as a catalyst for the reduction of potassium ferricyanide, congo red, methyl orange (MO), and methylene blue. It was found that Cu@Alg/BP beads catalytically reduced up to 95–99% of above pollutants within a few minutes. Cu@Alg/BP beads were more selective in reducing MO among the pollutants. The catalytic activity of Cu@Alg/BP was examined by evaluating the impact of numerous parameters on MO reduction. The results are expected to provide a new strategy for the removal of inorganic and organic water contaminants based on efficient and low-cost catalysts.

Copper Oxide-Antimony Oxide Entrapped Alginate Hydrogel as Efficient Catalyst for Selective Reduction of 2-Nitrophenol

“…The results were compared with the literature [ 36 , 37 , 38 , 39 , 40 ], and it was fount that Alg@Cu 2 O-Sb 2 O 3 is an efficient catalyst that can be used several times. This indicate that nanocomposite can play important role as a catalyst since nanocomposites have shown an enormous range of applications in different sectors [ 41 , 42 , 43 ].…”

Emerging Fabrication Strategies of Hydrogels and Its Applications

“…Additionally, a complex may be formed from Fe 2+/ Fe 3+ in the presence of negatively charged functional ligands, and thus a low yield of Fe 3 O 4 hydrogel may be obtained [82]. Besides this, copper oxideantimony oxide (Cu 2 O-Sb 2 O 3 ) was prepared and entrapped inside a Na-alginate hydrogel (Alg@Cu 2 O-Sb 2 O 3 ) [83][84][85][86].…”

Sodium Alginate-Based Functional Materials toward Sustainable Applications: Water Treatment and Energy Storage

“…Wasted adsorbents and filtration materials were further synthesized into highly valueadded catalysts and carbon precursors. 5,30,31 For different components for energy storage devices, the present research focuses on the synthesis of low-cost and green biomass-derived materials via a green manufacturing process to achieve high-effective and stable electrochemical properties, targeting environmental conservation and sustainable development. 32−34 Conventional carbon-based electrodes are derived from nonrenewable petroleum-based chemicals, which increase the expensive preparation cost of electrodes and do not meet the requirements of sustainable development due to the looming fossil fuel crisis.…”

“…Additionally, filtration materials are endowed with superhydrophilic and ion-exchange properties after being decorated with SA coatings, and then they can be assembled into membrane devices to achieve continuous separation of water contaminants. , Besides these, another challenge is how to help the “waste” adsorbents and filtration materials regain new value in an environmentally friendly way. Wasted adsorbents and filtration materials were further synthesized into highly value-added catalysts and carbon precursors. ,, …”