scholarly journals Degradation of textile dyes from aqueous solution using tea-polyphenol/Fe loaded waste silk fabrics as Fenton-like catalysts

RSC Advances ◽  
2021 ◽  
Vol 11 (14) ◽  
pp. 8290-8305
Author(s):  
Md Shipan Mia ◽  
Ping Yao ◽  
Xiaowei Zhu ◽  
Xue Lei ◽  
Tieling Xing ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Textile Dyes ◽  
Tea Polyphenols ◽  
Tea Polyphenol ◽  
Degradation Of Dyes ◽  
Silk Fabrics

In this study, waste silk fabrics were modified with tea-polyphenols then loaded with Fe2+ for degradation of dyes.

Functionalization Research of Silk Fabrics with PVP/ZnO Nanoparticles for Improving Silk Dyeability with Natural Tea Polyphenol Dye

2013 ◽  
Vol 843 ◽  
pp. 106-110
Author(s):  
Ting Juan Yi ◽  
Wen Li Wang ◽  
Yu Jun Zhou
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Zno Nanoparticles ◽  
Tea Polyphenols ◽  
Fastness Properties ◽  
Tea Polyphenol ◽  
Light Fastness ◽  
Silk Fabrics ◽  
Silk Dyeing ◽  
Scanning Electron

The dyeability and light fastness of natural dye (Tea polyphenols) in the presence of various percentages of Poly-N-Vinyl-2-Pyrrolidone (PVP), ZnO nanoparticles and PVP/ZnO nanocomposites were carried out in this article. These pretreatment agents were padded on functionalized silk fabrics and the modification effects were characterized by Fourier transform infrared spectroscopy and Scanning electron microscope. The dyeability, UV protection and light fastness properties were analyzed respectively. Experimental verification and theoretical analysis of silk dyeing and finishing performance with modified natural tea polyphenols dye were made.

scholarly journals Biosorption of anionic textile dyes from aqueous solution by yeast slurry from brewery

2017 ◽  
Vol 60 (0) ◽  
Author(s):  
Ketinny Camargo de Castro ◽  
Aline Silva Cossolin ◽  
Hélen Cristina Oliveira dos Reis ◽  
Eduardo Beraldo de Morais
Keyword(s):  
Aqueous Solution ◽  
Textile Dyes

scholarly journals Natural batik dyes from Terminalia bellirica, Ceriop condolleana, Cudrania javanensis and Pelthopherum pterocarpum

2021 ◽  
Vol 905 (1) ◽  
pp. 012019
Author(s):  
Sarwono ◽  
Darwoto ◽  
S Mataram
Keyword(s):  
Experimental Method ◽  
Ferrous Sulphate ◽  
Textile Dyes ◽  
Natural Dyes ◽  
Level 3 ◽  
Terminalia Bellirica ◽  
Silk Fabrics

Abstract This study aims to apply Terminalia bellirica, Ceriop condolleana, Cudrania javanensis, and Pelthopherum pterocarpum as textile dyes to cotton and silk fabrics. The experimental method was carried out to utilize the waste of Terminalia bellirica, Ceriop condolleana, Cudrania javanensis, and Pelthopherum pterocarpum as natural dyes using alum, lime, and ferrous sulphate fixations. The fixation values of alum, lime, and ferrous sulphate using natural dyes were at level 3 (good) on cotton and level 4 (very good) on silk.

scholarly journals Microbiota Facilitates the Formation of the Aminated Metabolite of Tea Polyphenols Which Trap Deleterious Reactive Endogenous Metabolites (P06-022-19)

2019 ◽  
Vol 3 (Supplement_1) ◽  
Author(s):  
Shuwei Zhang ◽  
Yantao Zhao ◽  
Christina Ohland ◽  
Christian Jobin ◽  
Shengmin Sang
Keyword(s):  
Gut Microbiota ◽  
Chronic Diseases ◽  
Green Tea ◽  
Tea Polyphenols ◽  
Specific Pathogen Free ◽  
Tea Polyphenol ◽  
Germ Free ◽  
Specific Pathogen ◽  
Conjugated Metabolites

Abstract Objectives The in vivo mechanism of tea polyphenol-mediated prevention of many chronic diseases is still largely unknown. Studies have shown that accumulation of toxic reactive cellular metabolites, such as ammonia and reactive carbonyl species (RCS), is one of the causing factors to the development of many chronic diseases. The objective of this study is to investigated the in vivo interaction between tea polyphenols and ammonia and RCS. Methods In mice, we gave 200 mg/kg tea polyphenol ((-)-epigallocatechin-3-gallate (EGCG) or theaflavin) to CD-1 mice, 129/SvEv specific-pathogen-free (SPF) mice, or germ-free (GF) mice. Urinary and fecal samples were collected in metabolic cages for 24 h. In humans, two healthy volunteers drank 4 cups of Lipton green tea every day for four days. On the fourth day, 24 h urinary and fecal samples were collected after consuming the first cup of tea. Using LC tandem mass, we searched the formation of the aminated and RCS conjugated metabolites of tea polyphenols. Chemical standards were synthesized to confirm the structures of these metabolites. In order to study the impact of gut microbiota on the formation of these metabolites, we also quantified the concentrations of these metabolites in SPF and GF mice. Results We found that both EGCG and theaflavin could rapidly react with ammonia to generate the aminated metabolites. Both tea polyphenols and their aminated metabolites could further scavenge RCS, such as methylglyoxal (MGO), malondialdehyde (MDA), and trans-4-hydroxy-2-nonenal (4-HNE), to produce the RCS conjugates of tea polyphenols and the aminated tea polyphenols. Both the aminated and the RCS conjugated metabolites of EGCG were detected in human after drinking four cups of green tea per day. By comparing the levels of the aminated and the RCS conjugated metabolites in EGCG or theaflavin exposed germ-free (GF) mice and specific-pathogen-free (SPF) mice, we demonstrated that gut microbiota facilitate the formation of the aminated metabolites of tea polyphenols, the RCS conjugates of tea polyphenols, and the RCS conjugates of the aminated tea polyphenols. Conclusions Altogether, this study provides in vivo evidences that tea polyphenols have the capacity to scavenge toxic reactive metabolic wastes. This finding opens a new window to understand the underlying mechanisms by which drinking tea could prevent the development of chronic diseases. Funding Sources We gratefully acknowledge financial support from NIH R01 grant AT008623 to this work.

scholarly journals Enhanced visible light photocatalytic degradation of dyes in aqueous solution activated by HKUST-1: performance and mechanism

RSC Advances ◽  
2020 ◽  
Vol 10 (61) ◽  
pp. 37028-37034
Author(s):  
Jianyu Zhang ◽  
Chunli Su ◽  
Xianjun Xie ◽  
Peng Liu ◽  
Md. Enamul Huq
Keyword(s):  
Aqueous Solution ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Metal Organic Framework ◽  
Surface Charges ◽  
Degradation Of Dyes ◽  
Metal Organic ◽  
Visible Light Photocatalytic ◽  
Performance And Mechanism ◽  
Organic Framework

HKUST-1 is a copper-based metal–organic framework (MOF). The HKUST-1/PMS/Vis system can effectively degrade RhB and MB but accomplish poor removal of AO7 and MR, which is attributed to the repulsion between surface charges.

The use of respirometric measurements to determine the toxicity of textile dyes in aqueous solution and after oxidative decolourisation processes

Chemosphere ◽  
2007 ◽  
Vol 67 (11) ◽  
pp. 2163-2168 ◽  
Author(s):  
Elke Boschke ◽  
Ulrike Böhmer ◽  
Jürgen Lange ◽  
Marc Constapel ◽  
Marc Schellenträger ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Textile Dyes
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