Wastewater

Catalysis

Engineering

Chromatography

Methylene blue

Chemical engineering

Waste management

Environmental engineering

Cationic polymerization

Extraction (chemistry)

Organic chemistry

Environmental chemistry

Environmental science

Dyeing

Chemistry

Fourier transform infrared spectroscopy

Photocatalysis

Pulp and paper industry

Research Papers Faculty of Materials Science and Technology Slovak University of Technology

The degradation of the environment which is due to the discharge of polluting wastewater from industrial sources poses a real problem in several countries. Textile industries use large volumes of water in their operations, discharging thus large volume of wastewater into the environment, most of which is untreated. The wastewater contains a variety of chemicals from various stages of process operations, including desizing, scouring, bleaching and dyeing. The main purpose of this paper is to introduce Infrared Spectrometry with Fourier transformation as a non-destructive method for study, identifation and rapid determination of selected representatives of cationic (Methylene Blue), azo (Congo Red, Eriochrome Black T) and nitroso (Naphthol Green B) dyes. In conjunction with the ATR technique, FTIR offers a reliable detection method of dyes without extraction by other dangerous substances. Spectral interpretation of dye spectra revealed valuable information about the identification and characterization of each group of dyes.

Usage of FTIR-ATR as Non-Destructive Analysis of Selected Toxic Dyes