Ultrafine Wool and Cotton Powder and Their Characteristics

Hassabo, Ahmed; Salama, Mohamed; Mohamed, Amina L.; Popescu, C.

doi:10.1080/15440478.2014.903819

Cited by 26 publications

(15 citation statements)

References 27 publications

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“…Many researchers have tried to produce wool powder by different methods, such as regeneration from keratin solution, mechanical attrition, and chemicalmechanical techniques [21][22][23][24]. Recent studies showed improvement in wool surface reactivity by converting fibers into fine powder [25][26][27].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Wool micro powder as a metal ion exchanger for the removal of copper and zinc

El‐Sayed

Salama

Kantouch

2014

Desalination and Water Treatment

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A B S T R A C TWaste wool fibers (WF) were oxidized and ball milled to enhance the exchanging ability toward some metal ions, namely copper and zinc. Wool fibers were oxidized with hydrogen peroxide and tetra acetyl ethylene diamine, followed by grinding process. Optimization of the exchanging medium with regard to the metal ion concentration, pH, and exchanging time was performed. It was observed that the ability of the wool powder (WP) and oxidized wool powder (OWP) to exchange greater amount of metal ions than the ordinary waste wool fibers. Mostly, current results verify a significant ability of the OWP to exchange copper and zinc ions from their aqueous medium. Nevertheless, the ability of all wool substrates used to exchange copper is more than their ability to exchange zinc, and as the pH of the exchanging medium increases, the uptake % of both copper and zinc ions by WF or WP increases to reach its maximum at pH 6. The efficiency of WF, WP, or OWP to adsorb copper and zinc ions after a number of adsorption/desorption tests was also studied.

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Section: Desalination and Water Treatmentmentioning

confidence: 99%

Wool micro powder as a metal ion exchanger for the removal of copper and zinc

El‐Sayed

Salama

Kantouch

2014

Desalination and Water Treatment

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“…Additionally, dust was used for research on composites. Waste fibers from cotton and wool were frozen in liquid nitrogen and milled at different time intervals [50]. The size of dust particles depends on the milling time, and their size ranged around 60 μm [50].…”

Section: Introductionmentioning

confidence: 99%

Material Utilization of Cotton Post-Harvest Line Residues in Polymeric Composites

et al. 2019

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This paper deals with a research focused on utilization of microparticle and short-fiber filler based on cotton post-harvest line residues in an area of polymeric composites. Two different fractions of the biological filler (FCR—reinforced cotton filler) of 20 and 100 µm and the filler with short fibers of a length of 700 µm were used in the research. The aim of the research was to evaluate mechanical characteristics of composites and adhesive bonds for the purpose of gaining new pieces of knowledge which will be applicable in the area of material engineering and assessing application possibilities of residues coming into being from agricultural products processing. Mechanical properties of the composite material produced by a vacuum infusion and tested at temperatures 20, 40, and 60 °C and adhesive bonds which were exposed to a low-cyclic loading, i.e., 1000 cycles at 30% to 70% from reference value of the maximum strength, were evaluated. Composite systems with the FCR adjusted in 5% water solution of NaOH showed higher strength values on average compared to untreated FCR. Unsuitable size of the FCR led to a deterioration of the strength. The filler in the form of 700 FCR microfibers showed itself in a positive way to composite materials, and the particle in the form of 20 FCR did the same to adhesive bonds. Results of adhesive bond cyclic tests at higher stress values (70%) demonstrated viscoelastic behavior of the adhesive layer.

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“…Nowadays, studies are focused on utilizing agricultural and industrial wastes as adsorbents for dye removaldue to their Waste wool fibers are amply available in Egypt. Utilizing this waste as adsorbent material could cut the cost of adsorption process and provide a solution for waste management [16][17][18][19][20][21][22]. The presence of functional groups (such as NH2, CONH 2 ,COOH,and OH) in the wool [18,20] makes ita promising sorbent.…”

Section: Introductionmentioning

confidence: 99%

“…Utilizing this waste as adsorbent material could cut the cost of adsorption process and provide a solution for waste management [16][17][18][19][20][21][22]. The presence of functional groups (such as NH2, CONH 2 ,COOH,and OH) in the wool [18,20] makes ita promising sorbent. These groups render wool high binding capacity toward metal ions [20,23,24] and dyes [25,26].…”

Section: Introductionmentioning

confidence: 99%

“…These groups render wool high binding capacity toward metal ions [20,23,24] and dyes [25,26]. In addition, grinding wool into fine powder enhances the wool binding capacity owing to anenormous increase in the specificsurface area, meanwhile, keeping the original features of the wool unchanged [18,20,27]. Further enhancement in the wool binding capacity might be attained by chemical modification.…”

Section: Introductionmentioning

confidence: 99%

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Modification of waste wool fiber as low cost adsorbent for the removal of methylene blue from aqueous solution

et al. 2017

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REMOVAL of methylene blue (MB) from water using adsorbent developed from waste wool fiber has been investigated by batch adsorption experiments in the present work. Wool fiber waste (WF) was collected from a local Spinning and Weaving Company, cleaned and further treated with citric acid to increase its adsorption capacity toward basic dyes. Raw and treated WF were ball milled to produce wool powder (WP) and modified wool powder (MWP), respectively. The carboxyl content was increased steadily as the citric acid solution concentration increased. The introduction of the carboxyl groups also has been proved by streaming potential measurements. The effect of contact time, wool dose and dye solution pH on the adsorption process were studied too. The adsorption isotherm was examined using Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) models. The adsorption equilibrium was attained within 20 minutes with a maximum removal percentage of 70 and 78 for WP and MWP, respectively. The wool dose affects the adsorption process significantly, especially for MWP which removes a higher percentage of MB (86 %) compared to WP (75 %). Both Freundlich and D-R were well fitting the adsorption equilibrium data with R 2 > 0.9. The values of Freundlich exponent factor (n) and D-R adsorption energy (E) reveal the chemisorption nature of the MB adsorption on both WP and MWP. This work demonstrated that, chemical and physical modifications of the waste wool fiber with citric acid has enhanced the adsorption of MB.

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Ultrafine Wool and Cotton Powder and Their Characteristics

Cited by 26 publications

References 27 publications

Wool micro powder as a metal ion exchanger for the removal of copper and zinc

Wool micro powder as a metal ion exchanger for the removal of copper and zinc

Material Utilization of Cotton Post-Harvest Line Residues in Polymeric Composites

Modification of waste wool fiber as low cost adsorbent for the removal of methylene blue from aqueous solution

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