Hybrid system with waste wollen materials for removal of water-borne pollutants

Fotokataliza je jedna od novijih tehnologija za uklanjanje onečišćivala iz vode. Korištenje ultraljubičastog zračenje potiče reakcije između fotokatalizatora i onečišćivala sadržanih u vodi. Onečišćivala prisutna u vodama u vrlo niskim koncentracijama uključuju pesticide. Pesticidi su zaštitna sredstva za uklanjanje štetočina i zaštitu usjeva na poljoprivrednim površinama. Konvencionalnim metodama pesticidi zaostaju u vodi nakon pročišćavanja ili ispiranjem poljoprivrednih površina direktno ulaze u vodotoke. U ovom radu prikazano je ispitivanje različitih fotokatalitički aktivnih materijala imobiliziranih na obrađenu otpadnu vunu u hibridnom sustavu za uklanjanje pesticida u vodi. Modelno onečišćivalo u vodi je insekticid imidakloprid, a provedeni su eksperimenti i s referentnim bojilom metilenskim modrilom. Hibridni reaktor sastoji se od filcanih uzoraka otpadne vune na koje se nanosi fotokatalizator titan dioksid ili njegovi kompoziti izloženi umjetnom ili sunčevom zračenju. Kroz reaktor kontinuirano cirkulira voda u kojoj su otopljena modelna onečišćivala.Photocatalysis is one of the new technologies for removing water-borne pollutants using ultraviolet radiation which stimulates reactions between a photocatalyst and compounds and contaminants in water. Pesticides belong to various types of pollutants present in water in small quantities. They are chemical substances used for the removal of agricultural pests. Traditional methods for water treatment are not efficient to remove them. By using conventional water treatment pesticides remain in water or they enter waterways directly through the process of rinsing agricultural areas. As a result of the infiltration into the ground, the contamination of water increases. This work describes the photocatalytic removal of a pesticide imidaclopride using various photocatalytic materials immobilized on waste wool in a hybrid system. In this paper, one of the most prominent dyes, methylene blue was used as a method to characterize the photocatalytic activity. The hybrid reactor contained titanium dioxide or his composites immobilized on waste wool balls under simulated or sunlight radiation. Water was continuously circulated through the reactor in which pollutants were dissolved