The role of chelating agents and amino acids in preventing free radical formation in bleaching systems

Hodes, Jing; Sielaff, Patric; Metz, H.; Kessler-Becker, Daniela; Gassenmeier, Thomas; Neubert, Reinhard H.H.

doi:10.1016/j.freeradbiomed.2018.09.023

Cited by 14 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…26 When applied to a substrate (like fabric or leather), it breaks down, releasing oxygen radicals species such as hydroperoxyl/superoxide radicals, amino radicals, and hydroxyl radicals. 28 These radicals break the chemical bonds of the chromophores, effectively decolorizing the stain or material. However, SP is a compound containing a perborate anion.…”

Section: Resultsmentioning

confidence: 99%

Technological possibilities for adding value on defective skins: Practical valorization of leather products with chromium and dyeing spots

Onem,

Yorgancioglu,

Dilek

et al. 2024

Textile Research Journal

View full text Add to dashboard Cite

In this study, decolorization via a bleaching operation was carried out on chrome and dye spotted skins with several bleaches to valorize the defective leather materials. Sodium perborate, hydrogen peroxide, sodium thiosulfate, sodium percarbonate, and oxalic acid were applied as bleaching agents in production. Sodium perborate by itself was applied and combined with other bleaching agents. Combined processes were also supported with an emulsifier agent for uniform distribution and deeper penetration of bleaching agents into the fibers. Color changes and differences on leather products were determined by Konica Minolta CM-3600d test apparatus spectrophotometrically before and after the applications. Bleached leathers were processed again, re-dyed, and finished after the bleaching operations. Then, bleaching performances of the single and combination applications were also evaluated for the leather strength indicators by analyzing tensile and tear strength of the final products as well as chromium (VI) oxidation of basic chromium (III) salts used in tanning. Antibacterial properties of the final bleached products were also investigated. As a result, sodium perborate was found to provide the most effective and safe bleaching without any physical and chemical deformation by creating antibacterial activity on leather.

show abstract

Section: Resultsmentioning

confidence: 99%

Technological possibilities for adding value on defective skins: Practical valorization of leather products with chromium and dyeing spots

Onem,

Yorgancioglu,

Dilek

et al. 2024

Textile Research Journal

View full text Add to dashboard Cite

show abstract

“…Production of ROS by copper and hydrogen peroxide can be partly controlled by chelating agents. The chelating of copper by 2,2',2'',2'''-(ethane-1,2-diyldinitrilo) tetraacetic acid (EDTA) decreases the production of hydroxyl radicals but increases hydroperoxyl radicals in the presence of hydrogen peroxide (Hodes et al, 2018) . 2-[Bis (carboxymethyl) amino]propanoic acid (MGDA) is a chelating agent with higher biodegradability than that of EDTA (Tandy et al, 2004;Cao et al, 2008) .…”

Section: Introductionmentioning

confidence: 99%

2-[Bis(carboxymethyl)amino] propanoic acid-Chelated Copper Chelate Enhances Bacterial Elimination by Sodium Percarbonate

et al. 2021

View full text Add to dashboard Cite

Sodium percarbonate (SP) is a relatively low-cost and stable solid oxidizer with a small environmental burden. It is often included in cleansers for sanitizing circulating water pipes and as bleaching reagents in laundry, although the bactericidal effect of SP is lower than that of chlorine-based agents. 2-[Bis (carboxymethyl) amino] propanoic acid-chelated copper (MGDA-Cu) was added to increase the effect of SP. The addition of 12 µM MGDA-Cu increased the bactericidal effect of 0.5 wt% SP against Staphylococcus aureus even in the presence of 0.3 wt% BSA, which is an experimental model of organic stain to protect bacteria from SP. MGDA-Cu was effective against Escherichia coli only in the absence of BSA and showed little effect against Bacillus subtilis. It enhanced the effect of SP to decrease the viscosity of sodium alginate, which is one of the major components of biofilms. The effect of MGDA-Cu on sanitization was also evaluated by 16S rRNA amplicon sequencing of the bacterial flora of the biofilm on an experimental model of a circulating water pipe. The structure of the bacterial flora was more influenced by a cleanser containing both MGDA-Cu and SP than a cleanser with only SP, suggesting that MGDA-Cu increases the sanitization effect.

show abstract

“…According to the previous studies, although iron (II) [9][10][11][12], copper (II) [5,9,[13][14][15], and calcium ions [13] were employed and studied as the mordanting agent for various proteinstructured fiber, only a few attempts using iron (II) ion for bleaching yak wool were made [16,17]. Therefore, there is still plenty of room for exploring a suitable mordanting reagent for yak wool bleaching and its impacts on the wool properties.…”

mentioning

confidence: 99%

Effect of various transition metal ions on mordanting stage of yak wool bleaching process

Arildii

Ranaajav²,

Genenbat³

et al. 2022

Mong. J. Chem.

View full text Add to dashboard Cite

Yak wool is a smooth, warm, and durable natural protein-structured fiber that could compete with cashmere and other high-end protein-structured fibers on the market. However, it suffers from drawing consumers’ attention due to the lack of color due to the shortfall of the yak wool bleaching technology. Herein, we studied the applicability of various transition metals, i.e., copper (II), cobalt (II), iron (II), and nickel (II) salts, as a mordanting reagent based on their effect on the hydrogen peroxide decomposition reaction and the morphological and mechanical properties of the bleached yak wool with the presence of these transition metal. Our study suggested that the iron (II) ion was the most efficient reagent for the mordant bleaching since it provided less fiber damage, relatively high strength, and elongation to the bleached yak wool with good whiteness, while the Cu (II) was the least favorable agent for the yak wool bleaching process.

show abstract

The role of chelating agents and amino acids in preventing free radical formation in bleaching systems

Cited by 14 publications

References 10 publications

Technological possibilities for adding value on defective skins: Practical valorization of leather products with chromium and dyeing spots

Technological possibilities for adding value on defective skins: Practical valorization of leather products with chromium and dyeing spots

2-[Bis(carboxymethyl)amino] propanoic acid-Chelated Copper Chelate Enhances Bacterial Elimination by Sodium Percarbonate

Effect of various transition metal ions on mordanting stage of yak wool bleaching process

Contact Info

Product

Resources

About