Flotation de-inking for recycling paper: contrasting the effects of three mineral oil-free offset printing inks on its efficiency

Yang, Shujie; Jian-bin, Shen; He, Tiefei; Chen, Chao; Wang, Junming; Tang, Yanjun

doi:10.1007/s11356-022-22046-4

Cited by 11 publications

(3 citation statements)

References 47 publications

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“…The resulting printing ink particles are impossible to remove from pulp suspension due to their size and hydrophilic characteristics [3]. In the case of UV-curable prints, de-inkability aspects are much lower than in the case of conventional hydrophobic prints, but with the development of new printing technologies this problem has been surpassed, mostly with development of LED-UV curing technologies [4]. If printing inks are not completely removed from the pulp suspension in the recycling process, then the final product (recycled paper) will contain different chemical components originating from printing inks and some of them can be toxic [5].…”

Section: Introductionmentioning

confidence: 99%

Stability Aspects of UV-Curable Prints on Pressure-Sensitive Labels Facestock Made from Agro-Industrial By-Products

Malenica,

Golik Krizmanić,

Vukoje

et al. 2023

Macromol

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During its life cycle, packaging comes into contact with various substances and even those it protects. Thus, for example, oil, water, and alcohol, if spilled on the packaging, can damage its functionality. In addition to exposure to chemicals, graphic products (packaging) can be exposed to moisture and UV radiation, which can negatively affect their stability during transport, storage, and handling. The choice of printing substrate can directly affect the stability of prints against different degrading influences. This paper explores the stability of thermochromic (TC) and conventional offset printing inks printed on environmentally friendly printing substrates intended for packaging applications (labelling). Results have confirmed that used printing substrates and printing inks give prints good rub resistance, but somewhat lower stability in terms of ethanol, water, and UV radiation. The choice of printing substrate can directly affect the stability of prints against different degrading influences. The resistance of prints to oil cannot be clearly defined since the samples were altered with the coloration of the oil. It can only be stated that oil reduced the functionality of the TC prints given that the samples were colored by the oil itself.

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Section: Introductionmentioning

confidence: 99%

Stability Aspects of UV-Curable Prints on Pressure-Sensitive Labels Facestock Made from Agro-Industrial By-Products

Malenica,

Golik Krizmanić,

Vukoje

et al. 2023

Macromol

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“…In addition to the importance of separating sticky particles from paper pulp, many studies conclude that colour removal is the most important step in wastepaper recycling [41,42]. Currently, paper mills use a chemical process to remove ink from wastepaper, which is generally more efficient and economical in terms of ink removal.…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Production Stages of Cardboard Pharmaceutical Packaging on the Circular Economy

Klemenčić,

Bolanča Mirković,

Bolf

2023

Sustainability

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Packaging appearance is important in a competitive market. Designers strive to create products that attract customers and often use laminated packaging, due to the attractive appearance and quality characteristics of the material. The circular economy in the recycling of cardboard packaging helps to reduce waste, saves natural resources and increases the quality of the environment. All of the above contributes to sustainable production, but the quality and properties of the obtained recycled paper materials should not be ignored. Recycling of laminated cardboard packaging often has a negative impact on the quality of recycled paper, due to the formation of sticky particles that can affect the optical properties of recycled paper and the efficiency of the recycling process. This article provides insight into the influence of each stage of production of packaging intended for pharmaceutical products on the properties and characteristics of recycled paper. The standard INGEDE 11 deinking method was used to remove dyes and other impurities from the pulp. The obtained optical results of the characteristics of recycled laboratory sheets obtained from laminated and non-laminated cardboard samples were compared in order to determine the impact of each stage of box production on the quality of the paper pulp. The acquired knowledge can be applied in the design phase of a more sustainable product, and laminated materials can be used in luxury products or to increase the functionality of the packaging. Designing for recycling will contribute to an increase in the quality of the obtained paper mass, which is directly related to an increase in the productivity of recycling and the sustainability of the packaging production process.

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“…To achieve environmental sustainability, the global paper recycling rate and utilization rate have increased to 59.7% and 60.2%, respectively, in 2020 (Paper Recycling Promotion Center). Effluents from paper recycling industries can cause considerable damage to recipient water bodies because of their high toxicity and organic load (Birjandi et al 2016;Mandeep et al 2019;Yang et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Recycled toilet paper: A novel source of sensitizer contamination in rivers

Yoshinari,

Terasaki

2023

Preprint

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Sensitizers contain an aromatic ring, accumulate in aquatic biota, exhibit the aryl hydrocarbon receptor-mediated activity. Effluent from paper recycling plants has been identified as a source of contamination. The presence of sensitizers in toilet paper may be a novel source in the aquatic environment. To examine possible sources of contamination by sensitizers, this study investigated the levels of sensitizers in recycled toilet paper. We also studied the prevalence of sensitizers in rivers receiving effluents from sewage treatment plants in Japan, between 2020–2022. We detected 8 sensitizers and related compounds in both toilet paper and river water samples; their total concentrations ranged between 0.78–34 µg/g (mean: 12 µg/g) for toilet paper and 58–1167 µg/L (median: 77 µg/L) for water. In the water samples, sensitizers and related compounds were partitioned between liquid and suspended solid phases, and in suspended solids, sensitizers and related compounds accounted for an average of 42% of the total. Correlation analysis showed a high correlation between sensitizer and related compound composition in the water from a river receiving sewage treatment plant effluents and toilet paper (0.82 < r < 0.87 on average, during the survey period). This study was the first to detect 4,4'-dimethyldiphenylmethane, 1,1-di(4methylphenyl)ethane, m-terphenyl, and benzyl 2-naphthyl ether in paper products. Since these compounds were also detected in the water samples analyzed in this study, toilet paper should be considered a novel source of sensitizer and related compound contamination in sewage treatment systems.

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Flotation de-inking for recycling paper: contrasting the effects of three mineral oil-free offset printing inks on its efficiency

Cited by 11 publications

References 47 publications

Stability Aspects of UV-Curable Prints on Pressure-Sensitive Labels Facestock Made from Agro-Industrial By-Products

Stability Aspects of UV-Curable Prints on Pressure-Sensitive Labels Facestock Made from Agro-Industrial By-Products

The Influence of the Production Stages of Cardboard Pharmaceutical Packaging on the Circular Economy

Recycled toilet paper: A novel source of sensitizer contamination in rivers

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