Polypyrrole-coated cotton textile as adsorbent of methylene blue dye

0490823 - ÚMCH 2019 RIV SK eng J - Journal Article
Ayad, M. M. - Amer, W. A. - Zaghlol, S. - Minisy, Islam M. - Bober, Patrycja - Stejskal, Jaroslav
Polypyrrole-coated cotton textile as adsorbent of methylene blue dye.
Chemical Papers. Roč. 72, č. 7 (2018), s. 1605-1618. ISSN 0366-6352
R&D Projects: GA TA ČR(CZ) TE01020022
Institutional support: RVO:61389013
Keywords : methylene blue * polypyrrole * cotton textile
OECD category: Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Impact factor: 1.246, year: 2018

Pollution caused by organic dyes is of serious environmental and health concern to the population. Dyes are widely used in textile coloring applications. In the present work, cotton textile was coated with a conducting polymer, polypyrrole (PPy), in situ during the oxidative polymerization of pyrrole. The resulting materials were utilized as easily separated and recyclable adsorbent for the removal of methylene blue (MB) as a model of cationic dyes in alkaline solutions. It showed also some affinity to remove Acid Green 25 as an anionic dye in acidic medium. The adsorption was assessed by monitoring the decrease in dye concentration by UV–Visible absorption spectroscopy. The influence of various parameters such as initial dye concentration, contact time, pH, temperature, and adsorbent dose on the adsorption process was studied. The pseudo-second-order kinetic model and Freundlich isotherm model were found to describe the adsorption process. The thermodynamic study revealed that the adsorption of MB by PPy was feasible, spontaneous, and exothermic process. Investigation of the substrate regeneration revealed that PPy deposited on cotton textile can be reused for dye adsorption several times with good efficiency and it allows for the recovery of MB for recycling purposes.
Permanent Link: http://hdl.handle.net/11104/0284955