Journal: Sustainable Materials and Technologies

Abbreviation

SM&T

Publisher

Elsevier

Journal Volumes

ISSN

2214-9929
2214-9937

Description

Filters

2019 - 201912020 - 20255
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Publications 1 - 6 of 6
  • Effect of multi-modal environmental stress on dose-dependent cytotoxicity of nanodiamonds in Saccharomyces cerevisiae cells
    Item type: Journal Article
    Prasad, Karthika; Recek, Nina; Zhou, Renwu; et al. (2019)
    Sustainable Materials and Technologies
  • Fungal melanin-based electrospun membranes for heavy metal detoxification of water
    Item type: Journal Article
    Tran-Ly, Anh N.; Ribera, Javier; Schwarze, Francis W.M.R.; et al. (2020)
    Sustainable Materials and Technologies
  • Advancements in ZnO-based photocatalysts for effective rhodamine dye removal from water
    Item type: Review Article
    Das, Madhurima; Ghatak, Avishek; Guha Ray, Preetam; et al. (2024)
    Sustainable Materials and Technologies
    The escalating growth of industries, population, and urban culture has exacerbated the global challenge of contaminated water due to hazardous organic dyes. One such noxious dye, rhodamine, poses a significant threat to human health and has consequently prompted extensive research into its removal from wastewater. Nanostructured ZnO emerges as a promising photocatalyst for tackling such hazardous colorants, owing to its exceptional performance and heightened surface reactivity. This review article comprehensively examines the photocatalytic removal of rhodamine dye by various ZnO nanomaterial-based catalysts over the past few decades. The primary objective is to investigate the impact of different synthesis techniques and modifications of ZnO, including doping with metal ions, carbon, and sulfur, or the creation of composites with various low-dimensional carbon materials, metal oxides, metal sulfides, and polymers. These strategies have been explored to enhance the efficacy of rhodamine dye remediation from wastewater by harnessing the improved photocatalytic performance of ZnO nanomaterials. The review delves into recent literature reports, highlighting observed results and key findings addressing critical challenges and outlines prospects for ZnO-based photocatalysts in rhodamine dye remediation. It becomes evident that evolving synthesis methods and optimizing the heterojunction of ZnO photocatalysts are essential for advancing the efficacy of rhodamine dye removal and contributing to the creation of a cleaner and greener environment.
  • Effect of waste PET and CR as sand replacement on the durability and effect of waste PET and CR as sand replacement on the durability and acoustical properties of semi dense asphalt (SDA) mixtures
    Item type: Journal Article
    Mikhailenko, Peter; Piao, Zhengyin; Kakar, Muhammad R.; et al. (2021)
    Sustainable Materials and Technologies
    Construction materials research is consistently striving to improve sustainability, in the reduction of virgin materials by use of otherwise landfilled materials of the same purpose. Crumb rubber (CR) from end-of-life tires and polyethylene terephthalate (PET) from post-consumer liquid containers are two of the most commonly circulating forms of waste in the urban environment. This study investigated the replacement of semi-dense asphalt (SDA) sand by untreated mechanically shredded CR and PET, at 2.5 and 5.1% respectively by total mass of aggregates. The mixtures were evaluated by compactability, indirect tensile strength (ITS), fracture energy (FE), water sensitivity by ITS ratio (ITSR%), surface texture and acoustic absorption tests. After compaction, the CR and PET samples experienced an elastic rebound effect, which resulted in the air voids being higher than expected. Also, the PET samples required more compaction energy. The ITS, FE and ITSR% were significantly reduced with CR replacement, while the PET mixture performed similar to the control, especially in FE. The sound absorption was related more to the air voids than the material type, although the absorption coefficients of the SDA was not found to be significant. The CR reduced the texture level of the pavement significantly in comparison to the control, while texture level remained the same for the PET mixture, despite a difference in the porosity. Further studies were performed using a mixture replacing PET by aggregate volume at 5.1%, comparing it to the control SDA in terms of low temperature cracking and permanent deformation at 50 °C. While the compactability of the PET mixture was now similar to that of the control, the resistance to cracking and permanent deformation was lower. Although the PET mixture had some interesting ductility properties, the replacement of sand by CR and PET is not recommended, and the more common use as asphalt mixture modifiers with fairly low addition contents of around 1% is more sound.
  • Evaluating the use of scrap metal to produce Al-5Cu-3Ti-1Cr-1Fe alloy powder for laser powder bed fusion
    Item type: Journal Article
    Monti, Chiara; Gobber , Federico Simone; Turani , Matteo; et al. (2025)
    Sustainable Materials and Technologies
    This study compares the production of Al-5Cu-3Ti-1Cr-1Fe alloy powders for laser powder bed fusion (PBF-LB/M) using either virgin or recycled and scrap materials as feedstock. As for the latter, three different material sources, namely aluminum 2024, Ti-6Al-4V and AISI 316L, were selected to reproduce the target alloy composition by gas atomization. The feasibility of achieving high-quality alloyed powder from mixed scrap sources was demonstrated, with particular focus on processability, mechanical performance, and environmental impact. Both powders produced from scrap/recycled (Re-Alloy) and virgin (V-Alloy) feedstock materials were processed via PBF-LB/M to compare their printability, and the manufactured samples were tested to evaluate their mechanical properties. The Re-Alloy exhibited a stable PBF-LB/M processability over a wide set of parameters, attributed to the presence of elements like Si and Mg, which improved laser absorptivity. Mechanical testing revealed comparable properties, with the Re-Alloy achieving slightly lower strength but higher elongation at break due to the reduced Fe content. Finally, a life cycle assessment (LCA) analysis quantified the environmental impacts, showing a significant reduction of approximately 50% in the carbon footprint for the Re-Alloy powders (15.5 ± 1.0 kgCO2/kg) compared to the V-Alloy (31.5 ± 1.8 kgCO2/kg). The carbon footprint of the PBF-LB/M process itself was measured at 15.2 ± 1.2 kgCO2/kg of deposited material. This research highlights the potential of using recycled and waste materials to reduce the environmental impact of metal powder production while maintaining technical feasibility. The findings offer a promising approach for enhancing the sustainability of additive manufacturing processes.
  • Thermal enhancement of hollow-Core 3DP through nozzle design customization
    Item type: Journal Article
    Eftekhar Olivo, Nik; Piccioni, Valeria; Milano, Francesco; et al. (2025)
    Sustainable Materials and Technologies
    On the architectural scale, material extrusion (ME) or Big Area Additive Manufacturing (BAAM) have been fabrication methods for polymer-based components explored as an alternative to injection molding, over the past 20 years. These Additive Manufacturing (AM) techniques face long printing hours, slow material cooling rates, and high material usage when scaling towards building-size components. Hollow-core 3D printing (HC3DP) is an novel fabrication method that addresses these limitations by extruding tubular beads, thereby saving time and materials. A key advantage of HC3DP is its insulating properties due to the air chambers within the prints. This technique has significant potential for large-scale facade fabrication while providing essential thermal insulation. However, initial research indicates that deploying HC3DP at an architectural scale, while meeting building insulation standards, requires using a double pane with an internal infill structure. This reduces its ability to optimize time and material efficiency. The full potential of this technology rather relies on its application for the fabrication of single-pane mono-material façade elements. Therefore, as a first step, this research aims to explore the different insulating properties of various HC wall configurations from more complex to infill-less wall typologies. As a second step, thermally optimized bespoke die-end extrusion nozzles are designed for HC3DP of façade panels to achieve higher material, time, and thermal efficiency. Through bespoke nozzle customization, different levels of thermal insulation improvement could be achieved, reaching an U-Value of 0.998 W/m2K on a HC3DP single-pane panel, improving by two the insulating capacity of basic single pane circular-sectioned HC, and complying with the nearly zero-energy building (NZEB) standards (1). All of this while reducing printing time, material usage and cost up to half compared to an insulating-equivalent HC3DP wall typology.
Publications 1 - 6 of 6