Photochemical Degradation of Micropollutants in Aqueous Media

International science and technology conference "Earth science"

Khandarkhaeva, M.S.^1 ; Batoeva, A.A.^1 ; Sizykh, M.R.^1 ; Aseev, D.G.^1 ; Tsydenova, O.V.^1

Baikal Institute of Nature Management, Siberian Branch of the Russian Academy of Sciences, Sakhyanova st. 6, Ulan-Ude

670047, Russia^1

关键词: Compound parabolic collector;    Micropollutants;    Natural sunlight;    Oxidative systems;    Photocatalytic oxidations;    Photochemical degradation;    Solar photo-Fenton;    Total Organic Carbon;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/272/2/022080/pdf
DOI  :  10.1088/1755-1315/272/2/022080

来源: IOP

【 摘 要 】

Natural sunlight was employed to enhance degradation of micropollutants in a Fenton-like oxidative system involving persulfate as the oxidant and ferrous iron (Fe(II)) as the catalyst Fe2+/S2O82-/Solar. Experiments were carried out in a bench-scale compound parabolic collector (CPC) and a batch photoreactor. The micropollutants tested were p-chlorophenol, atrazine, and triclosan. The reaction rates and degree of micropollutant degradation increased in the order: {Solar} 2O82-/Solar} 2+/S2O82-} 2+/S2O82-/Solar}. It was proven that photocatalytic oxidation activated by solar radiation leads not only to complete degradation of micropollutants, but also to substantial drops in levels of total organic carbon in the solution (i.e. leads to mineralization). Based on the results, a method of deep degradation of toxic organic pollutants based on the solar photo-Fenton process Fe2+/S2O82-/Solar was suggested.