The effect of pH and temperature on the dye sorption of wool powders

Wen, Guiqing; Cookson, Peter; Liu, Xin; Wang, Xungai

doi:10.1002/app.31758

Cited by 29 publications

(9 citation statements)

References 24 publications

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“…It contains three sulphonic groups, followed by the dye AR14 with two, whilst the dye AR88 contains only one sulphonic group. The latest discoveries show that the solubility of dyes in an aqueous medium increases along with an increased in the number of sulphonic groups in the dye molecule, whilst the substantivity of dyes decreases at a given value of pH [11]. This is confirmed by the results presented in this paper (among the studied dyes, dye AR18 is more soluble in water than dye AR88).…”

Section: Resultssupporting

confidence: 85%

Influence of dye structure and temperature on the adsorption of acid dyes onto polyamide 6 knitwear

Kert

Podlipnik

2019

Industria Textila

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In this research, the influence of dye structure and dyeing temperature on the adsorption of acid dyes onto polyamide 6 knitwear (PA 6) was studied. Three acid dyes with different amounts of sulphonic groups, namely C. I. Acid Red 88, C. I. Acid Red 14, and C. I. Acid Red 18 were used. Dyeing was performed in a Launder-ometer apparatus at 40°C and 60°C, at pH 4. The samples were taken out of the apparatus at different time intervals. The results showed that both dye structure and dyeing temperature affected the adsorption of acid dyes onto PA 6 knitwear. The rate and quantity of adsorption increased with an increase in dyeing temperature and a decrease in the number of sulphonic groups in dyes.

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Section: Resultssupporting

confidence: 85%

Influence of dye structure and temperature on the adsorption of acid dyes onto polyamide 6 knitwear

Kert

Podlipnik

2019

Industria Textila

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“…At high acidic pH, ionization of –COOH groups are suppressed and –CONH 2 groups are protonated (Lokhande and Teli, ) . In the stronger acidic condition in between polymer chain amide groups (–CONH) are also capable of being protonated that is why nylon fibre showing a higher positive surface charge in strong acidic condition and in case of high alkali condition –COOH group is easily ionized to generate negative zeta potential (Wen et al ., ).

\frac{H_{3} N^{+} - Nylon - COOH}{pH < IEP} \leftrightarrow \frac{H_{3} N^{+} - Nylon - {COO}^{-}}{pH = IEP} \leftrightarrow \frac{H_{2} N - Nylon - {COO}^{-}}{pH > IEP}

…”

Section: Resultsmentioning

confidence: 97%

Role of physicochemical factors on bacterial attachment in textile fibrous media

Roy

Ghosh

Bhowmick

et al. 2018

Water & Environment J

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One of the possible approaches to remove the Pseudomonas bacteria from surface water by using textile fibrous media has been studied in this article. The attachment of Pseudomonas bacteria inside textile fibrous media was studied using laboratory column experiment which led to the understanding of the physiochemical interaction between textile surface and the bacteria. Colloid-filtration theory was used to investigate the effects of various physicochemical factors like pH, ionic strength (M) and mass (g) of the porous media on bacterial attachment. The quantitative assessment of bacterial attachment on the textile surface media was carried out by determining the collision efficiency. The physicochemical factors mentioned above were optimized to obtain maximum collision efficiency so as to achieve maximum bacterial attachment on the textile media surface. Bacterial attachment is found to be directly related to the ionic strength of the suspending medium and the mass of the textile media. A significant improvement in collision efficiency is observed when the ionic strength of the suspended medium is increased. Maximum collision efficiency is achieved at high level of ionic strength and medium level of pH with high level of mass of the textile media.

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“…It can be seen from enlarged SEM image (Fig. 5b ) that the micron particles have porous structures which can easily adsorb other substances in surroundings [ 29 , 46 ]. Very recently, TEM characterization of ultrathin sections of wool powder prepared by an ultramicrotomy technique also demonstrated porous feature of wool powder [ 33 ].…”

Section: Resultsmentioning

confidence: 99%

Waste Fiber Powder Functionalized with Silver Nanoprism for Enhanced Raman Scattering Analysis

et al. 2017

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Biomass disks based on fine powder produced from disposed wool fibers were prepared for surface-enhanced Raman scattering (SERS). The wool powders (WPs) were modified by silver nanoprisms via an assembly method and then pressed into disks using a hydraulic laboratory pellet press. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were used to characterize the WPs and disks before and after treatment with silver nanoparticles (AgNPs). The WPs retained porous structures after treatment with AgNPs. The silver nanoprisms on WPs were observed clearly and the localized surface plasmon resonance (LSPR) properties of silver nanoprisms led to blue color of wool powder (WP). The obtained WP disks with AgNPs were confirmed to enhance greatly the Raman signal of thiram. The SERS disks are low-cost and convenient to use, with high sensitivity. The characteristic SERS bands of 10−8 M thiram can be identified from WP disks containing silver nanoparticles.

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The effect of pH and temperature on the dye sorption of wool powders

Cited by 29 publications

References 24 publications

Influence of dye structure and temperature on the adsorption of acid dyes onto polyamide 6 knitwear

Influence of dye structure and temperature on the adsorption of acid dyes onto polyamide 6 knitwear

Role of physicochemical factors on bacterial attachment in textile fibrous media

Waste Fiber Powder Functionalized with Silver Nanoprism for Enhanced Raman Scattering Analysis

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