Biowaste Materials for Advanced Biodegradable Packaging Technology

Emran, Mohammed Y.; Miran, Waheed; Gomaa, Hassanien; Ibrahim, Islam; Belessiotis, George V.; Abdel-Wahab, Adel A.; Othman, Mahmoud Ben

doi:10.1007/978-3-030-83783-9_46-1

Cited by 6 publications

(3 citation statements)

References 93 publications

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“…Ferrites decorated with various metals such as zinc and alumina have shown positive effects on eliminating dyes contained in wastewater [20]. Additionally, the biomass-synthesized biopolymers cellulose and chitin are the two most abundant biopolymers on the planet [25]. Win-win waste control is a worldwide concept for a greener and more sustainable ecosystem.…”

Section: Introductionmentioning

confidence: 99%

“…Win-win waste control is a worldwide concept for a greener and more sustainable ecosystem. In this regard, there have been some very recent but limited developments in the search for greener photocatalyst, particularly from waste [25][26][27]. In particular, alum sludge is produced in large volumes daily, and after dewatering, it still poses concerns regarding its final disposal.…”

Section: Introductionmentioning

confidence: 99%

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Environmental Win–Win Management: Using Aluminum-Based Solid Waste for Synozol Red-KHL Dye Oxidation

Nour,

Elsayed,

Tony

2024

ChemEngineering

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The awareness of the concept of the “Circular Economy” is motivating scientists to convert drinking water treatment plant by-products, which are based on aluminum waste, into a valorized material for wastewater treatment. Alum sludge from a local waterworks plant in Egypt was collected and dewatered using chitosan-coated magnetic nanoparticles. The role of the conditioned sludge in wastewater treatment was then examined. Chitosan (Ch) augmented with magnetite nanoparticles (MNs), labeled as ChMNs, was prepared by means of a simple co-precipitation route with mixing ratios of 1:1, 2:1, and 3:1 of chitosan and magnetite nanoparticles to form the ChMN catalyst. The ChMNs were shown to beneficially enhance alum sludge conditioning and dewaterability. The conditioned and dried aluminum-based sludge (AS) loaded with ChMNs was then used as a source of Fenton’s catalyst for Synozol Red-KHL textile dyeing wastewater. The characteristics of the AS-ChMN sample were investigated using Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The photocatalytic activity of the AS-ChMN composite was assessed by examining its diffuse reflectance spectra (DRS). Response surface methodological analysis was applied to optimize the operational parameters in order to reduce the use of chemicals and improve dye oxidation to form a complete (99%) dye oxidation strategy. The experiments demonstrated that the optimal operating parameters included doses of 1.5 g/L and 420 mg/L for AS-ChMNs and hydrogen peroxide, respectively, as a source of Fenton’s reaction at a working pH of 3.5. Kinetic and thermodynamic analyses for potential full-scale applications were conducted, showing the reaction to be exothermic and spontaneous in nature and following second-order reaction kinetics. Hence, the novelty of this work lies in the introduction of conditioned and dewatered alum sludge waste as a photocatalyst for textile dye effluent oxidation, which could be considered a “win–win” strategy.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Environmental Win–Win Management: Using Aluminum-Based Solid Waste for Synozol Red-KHL Dye Oxidation

Nour,

Elsayed,

Tony

2024

ChemEngineering

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“…The hydroxyl radicals (•OHs) and reactive oxygen species (ROS) on the TiO 2 surface result in the oxidation of the polyunsaturated phospholipids of the cell membranes. In this regard, TiO 2 has been used as an antimicrobial in packaging materials, where the eradication of microbes depends on the ROS that are released by the TiO 2 , leading to the oxidation of the bacterial cells and the cells’ death [ 19 ]. Moreover, the hydroxyl radicals cause the degradation of a wide variety of water pollutants [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Toxicity of Titanium Dioxide–Cerium Oxide Nanocomposites to Zebrafish Embryos: A Preliminary Evaluation

Pecoraro,

Scalisi,

Indelicato

et al. 2023

Toxics

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The widespread use of metal nanoparticles in different fields has raised many doubts regarding their possible toxicity to living organisms and the accumulation and discharge of metals in fish species. Among these nanoparticles, titanium dioxide (TiO2) and cerium oxide (CeO2) nanoparticles have mainly been employed in photocatalysis and water depuration. The aim of this research was to evaluate the potential toxic effects, after a co-exposure of TiO2-3%CeO2 nanoparticles, on zebrafish development, using an acute toxicity test. Increasing concentrations of TiO2-3%CeO2 nanoparticles were used (0.1-1-10-20 mg/L). The heartbeat rate was assessed using DanioscopeTM software (version 1.2) (Noldus, Leesburg, VA, USA), and the responses to two biomarkers of exposure (Heat shock proteins-70 and Metallothioneins) were evaluated through immunofluorescence. Our results showed that the co-exposure to TiO2-3%CeO2 nanoparticles did not affect the embryos’ development compared to the control group; a significant difference (p < 0.05) at 48 hpf heartbeat for the 1, 10, and 20 mg/L groups was found compared to the unexposed group. A statistically significant response (p < 0.05) to Heat shock proteins-70 (Hsp70) was shown for the 0.1 and 1 mg/L groups, while no positivity was observed in all the exposed groups for Metallothioneins (MTs). These results suggest that TiO2-3%CeO2 nanocomposites do not induce developmental toxicity; instead, when considered separately, TiO2 and CeO2 NPs are harmful to zebrafish embryos, as previously shown.

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