Spectroscopy: A promising tool for plastic waste management

Adarsh, U. K.; Kartha, V. B.; Chidangil, Santhosh; Unnikrishnan, V. K.

doi:10.1016/j.trac.2022.116534

Cited by 45 publications

(17 citation statements)

References 101 publications

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“…Multiple commonly used plastic items were collected including a plastic container composed of polyethylene (PE), a centrifuge tube composed of polypropylene (PP), plastic spoons composed of PS, a plastic sheet composed of polyvinylchloride (PVC), a plastic dispenser composed of mixed PS/PVC, and a plastic water bottle composed of polyethylene terephthalate (PET). The composing material of the plastics was verified by Raman spectroscopy, , after which they were cut into smaller pieces and washed with ethanol. The plastic pieces were then shredded via mechanical force using a stainless-steel grater to acquire microplastics.…”

Section: Methodsmentioning

confidence: 99%

Spherical DNA for Probing Wettability of Microplastics

et al. 2023

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Wettability of microplastics may change due to chemical or physical transformations at their surface. In this work, we studied the adsorption of spherical nucleic acids (SNAs) with a gold nanoparticle core and linear DNA of the same sequence to probe the wettability of microplastics. Soaking microplastics in water at room temperature for 3 months resulted in the enhancement of SNA adsorption capacity and affinity, whereas linear DNA adsorption was the same on the fresh and soaked microplastics. Drying of the soaked microplastics followed by rehydration decreased the adsorption of the SNA, suggesting that the effect of soaking was reversible and related to physical changes instead of chemical changes of the microplastics. Raman spectroscopy data also revealed no chemical transformations of the soaked microplastics. Heating of microplastics over a short period induced a similar effect to long-term soaking. We propose that soaking or heating removes air entrapped in the nanosized pores at the water–plastic interface, increasing the contact surface area of the SNA to afford stronger adsorption. However, such wetted porosity would not change the adsorption of linear DNA because of its much smaller size.

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Section: Methodsmentioning

confidence: 99%

Spherical DNA for Probing Wettability of Microplastics

et al. 2023

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“…Modern waste management techniques reduce the rapid depletion of both resources, including raw and combustible materials. Solid waste has significant negative drawbacks to the ecosystem and living conditions (Mukherjee et al 2021 ; Adarsh et al 2022 ; Saleh et al 2021 ; Singh and Sharma 2016 ). Additionally, a large portion of plastic waste appears with increasing the production scale, where plastic solid waste negatively affects the environment.…”

Section: Introductionmentioning

confidence: 99%

Sustainable development goals for industry, innovation, and infrastructure: demolition waste incorporated with nanoplastic waste enhanced the physicomechanical properties of white cement paste composites

Abdelzaher

2023

Appl Nanosci

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The COVID-19 pandemic significantly impacts the increase in plastic waste from food packaging, masks, gloves, and personal protective equipment (PPE), resulting in an environmental disaster, if collected, processed, transported, or disposed inappropriately. Plastic waste has a very long deterioration time in the environment (soil and water), cheap, and plentiful. Additionally, construction waste disposal is a process that transfers debris to a state that does lead to any sustainable or environmental problems. The core objective of this current research work is to provide safety and efficacy by partial substitution of both ultrafine demolition waste (UDW), incorporated with nanoplastic waste (NPW), for eco-white cement (E-WC) composition. E-WC is designed by partially substituted WC with UDW (1.0, 5.0, 10.0, 15.0, and 20.0 wt.%); incorporated with NPW (1.0 and 3.0 wt.%); to adequately protect people and the environment over long periods. The context examines the high performance, physicomechanical properties and high durability of blends as presences of silica in UDW proposed a hydraulic filler material, plus; high surface area of NPW. The microstructure and workability are characterized by X-Ray Fluorescence (XRF), Scanning Electron Microscope (SEM), and Transmission Electron Microscope (TEM) measurements. The record results show greatly enhanced in the mechanical strength due to the combination of NPW and UDW (active silica). With the presence of NPW and UDW in WC matrix, the highest level of crystallization formed consequently a decrease in whiteness reflection (Ry) and total porosity. In summary, WC blend with NPW and UDW reflects better workability and energy saving qualities, which are economical and environmentally beneficial and may result in decreased construction budget and improve a long-term raw material sustainability.

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“…14–27 The development of automated optical sorting technologies for implementation at MRFs is one of these active research thrusts in the plastics recycling community. 28,29 This is because MRFs currently rely on air jets, magnetic separators, mechanical pistons, and human intervention to sort PCPW, all of which are methods that have been deemed insufficient to meet growing recycling demands. 30,31…”

Section: Introductionmentioning

confidence: 99%

“…[14][15][16][17][18][19][20][21][22][23][24][25][26][27] The development of automated optical sorting technologies for implementation at MRFs is one of these active research thrusts in the plastics recycling community. 28,29 This is because MRFs currently rely on air jets, magnetic separators, mechanical pistons, and human intervention to sort PCPW, all of which are methods that have been deemed insufficient to meet growing recycling demands. 30,31 Articial intelligence (AI) and computer vision have emerged as potential solutions for high-throughput classication thanks to their scalability, accuracy, and capability to be integrated with sensors.…”

Section: Introductionmentioning

confidence: 99%