Effect of Dye Aggregation on the Sorption Behavior of Anionic Dyes onto Cationized Cellulose Fibers.

ABSTRACT: The aim of this work was to investigate the sorption mechanism of anionic dyes (acid, reactive) at the liquid-solid interface between the dye solution and cationized cellulose. Viscose fibers were cationized with 3-chloro-2-hydroxypropyl-N,N,N-trimethylammonium chloride to a cationic group content of 25 to 113 mmol kg^-1, and their sorption propensities were first examined in the absence of NaCl. With C.I. Acid Blue 25 and C.I. Reactive Red 120, the dye uptake followed a Langmuir isotherm at low dye concentrations, but at higher concentrations, an increase in dye uptake attributed to a nonionic sorption mechanism was observed. In the case of C.I. Reactive Blue 19, no nonionic sorption process occurred; rather, a decrease in dye uptake was observed. The latter

SUBMITTER: Netzer F 

PROVIDER: S-EPMC12288074 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature