REMOVAL OF DYES FROM TEXTILE WASTEWATER BY SORPTION ONTO LIGNO–CELLULOSIC MATERIALS
DANIELA SUTEU 1*, DOINA BILBA 1, CARMEN ZAHARIA 1, ALINA POPESCU 2 (1)”GH.ASACHI” TECHNICAL UNIVERSITY OF IAŞI,
FACULTY OF CHEMICAL ENGINEERING AND ENVIRONMENT PROTECTION,
DEPARTMENT OF ENVIRONMENTAL ENGINEERING AND MANAGEMENT,
BLVD. D. MANGERON, 71A, IAŞI - 700050, ROMANIA
(2) INCDTP - BUCUREŞ
Wastewater from textile industry contains various contaminants, among them dyes are considered to be highly toxic to the aquatic biota. The aim of this paper was to investigate in batch experiments the decolorization of synthetic aqueous solutions containing some cationic and anionic dyes by sorption on lingo-cellulosic solid wastes, such as softwood sawdust. Operating variables studied were: pH, sorbent dose and particle size, dye concentration, temperature and contact time. The sawdust-dye sorption systems were described using Freundlich and Langmuir isotherm models. The obtained results allow to estimate that the sawdust can be useful in implementation of a new cheap technology for textile wastewater treatment.
