Fuzzy Method for in Control Acetaldehyde Generation in Resin Pet in the Process of Packaging Pre-Forms of Plastic Injection

Monteiro, Carlos Alberto; Macêdo, Emanuel Negrão; Nascimento, Manoel Henrique Reis; Freitas, Carlos Alberto Oliveira de; Brito, Jorge de Almeida

doi:10.22161/ijaers.5.8.29

Cited by 2 publications

(1 citation statement)

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“…Transesterification of vinyl ester produces vinyl alcohol, which converts to volatile acetaldehyde as the main degradation byproduct ( Figure S3 ). Other volatile degradation products such as carbon monoxide and dioxide, ethylene, acetylene, and water are formed in very small amounts at low temperatures ( Figure S2 ) [ 16 , 17 , 18 , 19 , 20 ]. Due to their small size, large specific surface area, and high hydrophobicity, as well as the presence of proton donor and proton acceptor functional groups, MPs can adsorb pollutants and thus serve as transport vectors in the environment.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aging on Physicochemical Properties and Size Distribution of PET Microplastic: Influence on Adsorption of Diclofenac and Toxicity Assessment

Zjačić

Tonković

Pulitika

et al. 2023

Toxics

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Microplastics (MPs) are detected in the water, sediments, as well as biota, mainly as a consequence of the degradation of plastic products/waste under environmental conditions. Due to their potentially harmful effects on ecosystems and organisms, MPs are regarded as emerging pollutants. The highly problematic aspect of MPs is their interaction with organic and inorganic pollutants; MPs can act as vectors for their further transport in the environment. The objective of this study was to investigate the effects of ageing on the changes in physicochemical properties and size distribution of polyethylene terephthalate (PET), as well as to investigate the adsorption capacity of pristine and aged PET MPs, using pharmaceutical diclofenac (DCF) as a model organic pollutant. An ecotoxicity assessment of such samples was performed. Characterization of the PET samples (bottles and films) was carried out to detect the thermooxidative aging effects. The influence of the temperature and MP dosage on the extent of adsorption of DCF was elucidated by employing an empirical modeling approach using the response surface methodology (RSM). Aquatic toxicity was investigated by examining the green microalgae Pseudokirchneriella subcapitata. It was found that the thermooxidative ageing process resulted in mild surface changes in PET MPs, which were reflected in changes in hydrophobicity, the amount of amorphous phase, and the particle size distribution. The fractions of the particle size distribution in the range 100–500 μm for aged PET are higher due to the increase in amorphous phase. The proposed mechanisms of interactions between DCF and PET MPs are hydrophobic and π–π interactions as well as hydrogen bonding. RSM revealed that the adsorption favors low temperatures and low dosages of MP. The combination of MPs and DCF exhibited higher toxicity than the individual components.

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Section: Introductionmentioning

confidence: 99%

Effect of Aging on Physicochemical Properties and Size Distribution of PET Microplastic: Influence on Adsorption of Diclofenac and Toxicity Assessment

Zjačić

Tonković

Pulitika

et al. 2023

Toxics

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Sub- and supercritical water for chemical recycling of polyethylene terephthalate waste

Čolnik

Knez

Škerget

2021

Chemical Engineering Science

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Fuzzy Method for in Control Acetaldehyde Generation in Resin Pet in the Process of Packaging Pre-Forms of Plastic Injection

Abstract: Abstract-In order to control the drying temperature of the PET resin in the silo of the plastic injection molding

Cited by 2 publications

References 5 publications

Effect of Aging on Physicochemical Properties and Size Distribution of PET Microplastic: Influence on Adsorption of Diclofenac and Toxicity Assessment

Effect of Aging on Physicochemical Properties and Size Distribution of PET Microplastic: Influence on Adsorption of Diclofenac and Toxicity Assessment

Sub- and supercritical water for chemical recycling of polyethylene terephthalate waste

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