Ecological Sustainability and Waste Paper Recycling

Mirković, Ivana Bolanča; Majnarić, Igor; Bolanča, Zdenka

doi:10.1016/j.proeng.2015.01.356

Cited by 12 publications

(3 citation statements)

References 7 publications

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“…The separation of impurity particles by the deinking flotation method depends on many factors. The quality of the paper collected for recycling, the age of the printed product, and the climatic conditions during its life cycle as well as the coatings, varnishes, laminates, and adhesives can affect their deinkability [12,[60][61][62][63][64][65]. Some of these are the small or large size of the ink particles (particles from 10 to 100 µm are best separated), the weak hydrophobicity of the ink particles, the difficulty of separating the particles from the cellulose, the presence of adhesives in the cellulose pulp (formation of sticky particles), and others.…”

Section: Resultsmentioning

confidence: 99%

Determination of the Mass Fractions of the Heavy Metals in the Recycled Cellulose Pulp

Klemenčić,

Bolanča Mirković,

Bolf

et al. 2024

Polymers

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In the process of paper recycling, certain amounts of metals can be found in the cellulose suspension, the source of which is mainly printing inks. The paper industry often uses different technologies to reduce heavy metal emissions. The recycling of laminated packaging contributes to the formation of sticky particles, which affects the concentration of heavy metals. This study aimed to determine the mass fraction of metals in the different phases of the deinking process to optimize the cellulose pulp’s quality and design healthy correct packaging products. In this research, the deinking flotation of laminated and non-laminated samples was carried out by the Ingede 11 method. As a result of the study, the mass fractions of metals in cellulose pulp were divided into four groups according to the mass fraction’s increasing value and the metals’ increasing electronegativity. The quantities of metals were analyzed using Inductively Coupled Mass Spectrometry (ICP-MS). The separation of metals from cellulose pulp is influenced by the presence of adhesives and the electronegativity of the metal. The results of the study show that the recycling process removes certain heavy metals very well, which indicates the good recycling potential of pharmaceutical cardboard samples.

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Section: Resultsmentioning

confidence: 99%

Determination of the Mass Fractions of the Heavy Metals in the Recycled Cellulose Pulp

Klemenčić,

Bolanča Mirković,

Bolf

et al. 2024

Polymers

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“…In addition to the formulation and use of water repellents themselves, an important issue is the effect of their use on paper recycling processes. While many studies can be found in the literature on changes in the structure of cellulose fibers during multiple pulping and paper forming cycles [ 19 , 20 ], as well as general analyses of the environmental aspects of these processes [ 15 , 21 ], the impact of organosilicon agents in this regard has not yet been studied.…”

Section: Introductionmentioning

confidence: 99%

Siloxane-Starch-Based Hydrophobic Coating for Multiple Recyclable Cellulosic Materials

Ganicz

Rózga-Wijas

2021

Materials

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The results of the application of a new hydrophobization agent based on a triethoxymethylsilane and standard starch aqueous mixture for mass-produced cellulosic materials—printing paper, paperboard, and sack paper—have been evaluated to examine whether such a mixture can be used in industrial practice. The application of this agent on laboratory sheets prepared in a repetitive recycling process was performed to investigate its influence on the formation and properties of the products, as well as the contamination of circulating water. Measurements of the water contact angle, Cobb tests, and water penetration dynamics (PDA) were performed to test the barrier properties of the resulting materials. The effects of the applied coatings and recycling process on the paper’s tensile strength, tear index, roughness, air permeance, and ISO brightness were studied. Studies have proven that this formulation imparts relatively high surface hydrophobicity to all materials tested (contact angles above 100°) and a significant improvement in barrier properties while maintaining good mechanical and optical performance. The agent also does not interfere with the pulping and re-forming processes during recycling and increases circulation water contamination to an acceptable degree. Attenuated total reflectance Fourier-transform infrared (FT-IR) spectra of the paper samples revealed the presence of a polysiloxane network on the surface.

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“…The organic portion consists of hemicellulose, cellulose, lignin, and various compound of lignin about 70%. The inorganic portion consists of added material, such as clay, titanium oxide and calcium carbonate about 30 wt% [13]. These organics begin to decompose as carbon residue at about 270-350°C.…”

Section: Introductionmentioning

confidence: 99%

Physical property and compressive strength of fired clay bricks incorporated with paper waste

Srisuwan

Phonphuak²

2020

J Met Mater Miner

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This research is intended to evaluate the effects of paper waste addition on the physical properties and strength of fired clay bricks. Paper waste was mixed with clay in the ratios of 2.5, 5.0, 7.5 and 10 wt%. Green bricks were fired with different variations of temperature from 900-1100Â°C for1 h in air. Fired bricks were then analyzed for physical and mechanical properties. Porosity was increased with higher paper waste content. An increase in porosity relatedly created lower density and higher shrinkage values. Additionally, porous content in fired clay bricks correlated to the deterioration of the compressive strength, due to the weakness area of defect. However, the highly porous brick presented low thermal conductivity. Therefore, the porous brick from paper residue inclusion presented excellent insulating behavior, while adequate compressive strength could be still be maintained.

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Ecological Sustainability and Waste Paper Recycling

Cited by 12 publications

References 7 publications

Determination of the Mass Fractions of the Heavy Metals in the Recycled Cellulose Pulp

Determination of the Mass Fractions of the Heavy Metals in the Recycled Cellulose Pulp

Siloxane-Starch-Based Hydrophobic Coating for Multiple Recyclable Cellulosic Materials

Physical property and compressive strength of fired clay bricks incorporated with paper waste

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