Influence of Various Pre-Treatment Processes on Selective Oxidation of Cotton Yarns

Toshikj, Emilija; Jordanov, Igor; Dimova, Vesna; Mangovska, Biljana

doi:10.14504/ajr.4.4.4

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…The similar composition of the rice husk with natural cellulose fibers like cotton, linen, or flax fibers, suggests that alkaline scouring has a high chance of successful lignin removal (Ivanovska et al 2020;Lazic et al 2018;Tarbuk et al 2020;Toshikj et al 2016Toshikj et al , 2017. As mentioned before, the low cost of the adsorption and modification process is detrimental.…”

Section: Introductionmentioning

confidence: 89%

Adsorption of BEZAKTIV BLAU V3-R and BEZAKTIV BLAU S-2R reactive dyes onto rice husk modified by the circular economy concept

Mladenovic

Petkovska

Dimova

et al. 2022

Preprint

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Rice husk, modified with effluent from the alkaline scouring of cotton, employing an inexpensive treatment based on the circular economy concept, is used as a bio-sorbent to study the equilibrium and kinetic on cold brand BEZAKTIV BLAU V3-R (BBV3-R) and medium brand BEZAKTIV BLAU S-2R (BBS2-R) reactive dyes. 10, 20, and 40 g L-1 rice husk is used to follow adsorption of 0.1, 0.2, 0.3, 0.4, and 0.5 g L-1 BBV3-R and BBS2-R in a presence of 60 g L-1 NaCl at pH 10, at the temperature of 25oC and 40oC, respectively. Langmuir, Freundlich, and Dubinin-Radushkevic's adsorption models were employed, with the Freundlich model proving the best fit for our data. Activation energy calculated with the Dubinin-Radushkevic model (lower than 8 KJ mol-1) confirms the physical sorption of these reactive dyes onto the husk. The obtained maximum experimental absorption capacities of 122.2 mg g-1 for BBV3-R and 171.7 mg g-1 for BBS2-R using 10 g L-1 ERH are the best found in the literature. Pseudo-second-order model determines the adsorption kinetics, while the liquid film diffusion model is rate-determining. This paper demonstrates the applicability of the circular economy concept to obtain an efficient adsorbent for purifying colored effluent enriched with reactive dyes, which are one of the most challenging dyes in the textile industry from the aspect of their effluent purifying.

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Section: Introductionmentioning

confidence: 89%

Adsorption of BEZAKTIV BLAU V3-R and BEZAKTIV BLAU S-2R reactive dyes onto rice husk modified by the circular economy concept

Mladenovic

Petkovska

Dimova

et al. 2022

Preprint

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“…Next, the hanks were extended by the application of tension to the original length, rinsed with hot (80°C) and cold (18°C) water for 1 min under tension, neutralized, rinsed, and dried at 80°C. [21][22][23] Optimal scouring conditions for alkaline pectinase were pH 9 (0.15 g/L Na 3 PO 4 ), 1 mL/L nonionic wetting surfactant Kemonecer NI (KEMO Croatia) at 55°C for 30 min, 3,12 and pH 4 (acetate buffer), in the presence of 1 mL/L Kemonecer NI at 45°C for 30 min 14,17 for acid pectinase.…”

Section: Methodsmentioning

confidence: 99%

“…[6][7][8][9][10][11][12][13] Pectinases alone, or in combination with cellulases, appeared to create the most hydrophilic cotton. Alkaline and acid pectinases were used for enzymatic scouring of raw cotton, alone, 6,[14][15][16] or in combination with selective 17 and non-selective oxidants. 18 Pectinases improved the hydrophilicity of cotton, while oxidation of enzymatically scoured cotton imparted aldehyde and carboxyl groups to the cotton without substantial degradation of cotton yarns, confirmed by only a 15% decrease in tensile strength and an 8% decrease in the degree of polymerization.…”

Section: Introductionmentioning

confidence: 99%

Influence of Pectinase Adsorption on Scouring Efficiency of Mercerized Cotton Yarns

Gorgieva,

Mladenovic,

Petkovska

et al. 2023

AATCC Journal of Research

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The low scouring efficiency of mercerized cotton yarns scoured with alkaline and acid pectinases, reported in previously published articles, raised the hypothesis of the lack of pectinase adsorption onto mercerized cotton. In an attempt to identify whether low pectinase adsorption occurs, the adsorption of alkaline and acid pectinases on raw and mercerized cotton yarns is measured using the Lowry protein assay, while laser-scanning confocal fluorescence microscopy is used to visually show the presence/absence of the enzymes on the surface of the cotton yarns. In addition, the surface zeta potential of the raw and mercerized cotton yarns is measured to identify the influence of the surface charge on the adsorption ability of the used enzymes. Data suggest that although used substrates have adsorbed more alkaline than acid pectinase, the adsorption of both enzymes is more intensive onto the mercerized cotton relative to raw cotton. The similar surface zeta potential of the raw and mercerized yarns indicates that higher enzyme adsorption on mercerized cotton is not influenced by the surface charge. Laser-scanning confocal fluorescence microscopy micrographs depict an evident increase of fluorescing signal with scouring time to raw and mercerized cotton yarn. The more intensive signals after 60 min of enzymatic scouring with both enzymes suggest enzyme presence on the yarn surface after a long treatment time. The obtained results confirm the enzyme retention on the yarn surface, thus excluding the hypothesis that the absence of enzyme adsorption is a factor for the low scouring efficiency of mercerized cotton yarns.

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“…Alkaline scouring of cotton is a process that uses dilute sodium hydroxide solution and surfactants to remove non-cellulosic hydrophobic components from cotton's cuticle and to make it hydrophilic (Toshikj et al 2016;Toshikj et al 2017;Lazic et al 2018). The circular economy is a new concept opposite to the linear economy one, which is based on production, use, and throwing away of the products.…”

Section: Introductionmentioning

confidence: 99%

Circular economy approach for rice husk modification: Equilibrium, kinetic, thermodynamic aspects and mechanism of Congo red adsorption

Mladenovic

Petkovska

Dimova

et al. 2021

Preprint

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Equilibrium, kinetic, thermodynamic aspects and mechanism of Congo red adsorption onto rice husk treated with effluent from cotton pre-treatment are examined by altering the initial dye concentration, contact time, temperature, and adsorbent mass. When a lower mass is applied, the treated rice husk adsorbs the Congo red following the Langmuir model, while at a higher mass, the adsorption follows the Freundlich model. А maximum of 149.1 mg/g Congo red is adsorbed with 10 g/L rice husk at 70oC. This capacity of the chemically modified rice husk is one of the better ones found in the literature. The calculated Dubinin–Radushkevich activation energy indicates the physical nature of Congo red adsorption adsorbed under the pseudo-second-order kinetic model. The thermodynamic analysis confirmed spontaneous and endothermic adsorption with physically created Congo red-rice husk bonds. These results showed the applicability of the circular economy concept in the effort to obtain an efficient adsorbent without wasting additional chemicals and energy that could be used to create a continuous column-mode process of rice husk modification and purification of colored effluent from the textile industry.

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Influence of Various Pre-Treatment Processes on Selective Oxidation of Cotton Yarns

Cited by 9 publications

References 13 publications

Adsorption of BEZAKTIV BLAU V3-R and BEZAKTIV BLAU S-2R reactive dyes onto rice husk modified by the circular economy concept

Adsorption of BEZAKTIV BLAU V3-R and BEZAKTIV BLAU S-2R reactive dyes onto rice husk modified by the circular economy concept

Influence of Pectinase Adsorption on Scouring Efficiency of Mercerized Cotton Yarns

Circular economy approach for rice husk modification: Equilibrium, kinetic, thermodynamic aspects and mechanism of Congo red adsorption

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