Removal of vat and disperse dyes from residual pad liquors

Vera Golob (Author), Alenka Ojstršek (Author)

Abstract

The efficiency of three wastewater treatment techniques, coagulation/flocculation, adsorption and ultrafiltration, has been studied for the removal of vat and disperse dyes from residual pad liquors. Three inorganic coagulants Al2(SO4)3 18H2O, FeSO4 7H2O, FeCl3 6H2O and commercial cationic flocculant, as individuals and in combination, were tested for the coagulation/flocculation methods. Granular activated carbon was used as an adsorbent in the adsorption technique. Ultrafiltration was performed using a polyethersulfone membrane with a molecular weight cut-off of 10 kDa. Dye removal was evaluated as the difference between concentrations of dyes in pad liquors before and after a particular treatment using absorbance measurements.The obtained results indicated over 90% of dye removal using appropriate coagulants and only 40% using activated carbon. The best results, dye removal over 98%, were achieved using the ultrafiltration technique.

Keywords

barvanje tekstilij;disperzna barvila;odpadne vode;razbarvanje;čiščenje odpadnih vod;koagulacija;flokulacija;adsorpcija;ultrafiltracija;redukcijska barvila;textile dyeing;disperse dyes;wastewater;decoloration;wastewater treatment;coagulation;flocculation;adsorption;ultrafiltration;vat dyes;

Data

Language:	English
Year of publishing:	2005
Typology:	1.01 - Original Scientific Article
Organization:	UM FS - Faculty of Mechanical Engineering
UDC:	677.027.4:628.3
COBISS:	8922390
ISSN:	0143-7208
Views:	1803
Downloads:	102
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary keywords:	barvanje tekstilij;disperzna barvila;odpadne vode;razbarvanje;čiščenje odpadnih vod;koagulacija;flokulacija;adsorpcija;ultrafiltracija;redukcijska barvila;
URN:	URN:SI:UM:
Pages:	str. 57-61
Volume:	ǂVol. ǂ64
Issue:	ǂiss. ǂ1
Chronology:	2005
ID:	8718449