Degr adation of Acid Blue ۱۱۳ as organic pollutants in aqueous media by ozonation.

Large am ount of chemically vari ous dyes are used for several industrial applications. Due to environm ental implications, new technologies have been evaluated for degradation of these compoun ds in textile effluents.Some studies suggest em ploying adv anced oxidative processes (AOPs) in isolation or combined for preliminary assess ment [۱]. A OPs have been defined as the aqueous phase chemical oxidation of ta rget organic or inorganic pollutants by a process involvin g hydroxyl free radica s [۲].In general, ozon e oxidation pathways include direct oxidation by ozone or indirect oxidation by hydroxyl radicals (OHÛ). Direct oxidatio n involves degradation of organics by ozone molecules under acidic conditions, in which an ozone molecule reac ts with an unsaturated bond due to its dispolar structure, leading to a splitting of the bond. While the term indirect oxidation consider degradation mechanism of organic throughout hydroxyl radicals and it occurs under basic conditions[۳].Using o zonation fo r decolorizing wastewater has the following advantages: ۱) Ozone is readily available, soluble in wate r and easily monitored. ۲) It does not increase the volume of wastewater and sludge. ۳) It re moves color and reduces the organic matter in one step.T he aim of this study is the degerationof the A cid Blue ۱۱۳ (AB۱۱۳ ) as organic pollutant b y ozonationand optimization of effective parametersincluding ini tial pH and initial d ye concentration by res ponse surface methodol ogy (RSM).

کلیدواژه ها:

ozone ، organic pollutant ، waste water