Katalitička obrada fenolnih otpadnih voda / Karolina Maduna1, Stanka Zrnčević1.
Sažetak

U radu je ispitan utjecaj različitih tipova zeolitnih nosača na aktivnost i stabilnost Cu/ZSM5, Cu/Y i Cu/X katalizatora korištenih za obradu fenolne (modelne) otpadne vode vodikovim peroksidom. Katalizatori su pripravljeni ionskom izmjenom komercijalnih ZSM5, Y i X zeolita. Karakterizacija katalizatora je obuhvaćala rendgensku difrakcijsku analizu (XRD), skenirajuću elektronsku mikrografiju (SEM), infracrvenu spektroskopiju (FTIR), elementarnu analizu (AAS) te određivanje specifične površine standardnom BET metodom. Reakcija je provođena u šaržnom reaktoru pri atmosferskom tlaku, različitim temperaturama (323 K – 353 K), konstantnoj koncentraciji fenola (0,01 mol dm-3) i vodikovog peroksida (0,1 mol dm-3) te masi katalizatora (0,5 g dm-3). Djelotvornost katalizatora praćena je preko konverzije fenola, ukupnog organskog ugljika te skidanja bakra s nosača. Utvrđeno je da je Cu/X katalizator aktivniji i stabilniji od Cu/Y i Cu/ZSM5 katalizatora te da je pri blagim reakcijskim uvjetima pogodan za obradu fenolne otpadne vode..; The paper examines the impact of different types of zeolite supports on the activity and stability of the Cu/ZSM5, Cu/Y and Cu/X catalyzers used in phenolic (model) wastewater treatment by means of hydrogen peroxide. The catalyzers were prepared by means of ion exchange of the commercial ZSM5, Y and X zeolite. The catalyzer characterization included x-ray powder diffraction (XRD), scanning electron microscope (SEM) micrography), infrared spectroscopy (FTIR), elementary analysis (AAS) and the determination of specific surface by the standard BET method. The reaction was conducted in a batch reactor at the atmospheric pressure, different temperatures (323 K - 353 K), constant concentration of phenol (0.01 mol dm-3) and hydrogen peroxide (0.1 mol dm-3) and catalyzer mass (0,5 g dm-3). The catalyzer efficiency was monitored by means of phenol conversion, total organic carbon and copper removal from the support. It was determined that the Cu/X catalyzer is more active and stable than the Cu/Y and Cu/ZSM5 catalyzers and that it is suitable for phenolic wastewater treatment at mild reaction conditions.