Treatment of industrial contaminants with zero-valent iron- and zero-valent aluminium-activated persulfate: a case study with 3,5-dichlorophenol and 2,4-dichloroaniline

Authors : Olga KOBA UCUN, Bahareh MONTAZERİ, Tugba OLMEZ HANCİ

Pages : 269-281

View : 23 | Download : 10

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Zero-valent iron insert ignore into journalissuearticles values(ZVI);- and zero-valent aluminium insert ignore into journalissuearticles values(ZVA);-activated persulfate insert ignore into journalissuearticles values(PS); oxidation procedure was applied to remove the industrial pollutants 3,5-dichlorophenol insert ignore into journalissuearticles values(3,5-DCP; 12.27 mu M); and 2,4-dichloroaniline insert ignore into journalissuearticles values(2,4-DCA; 12.34 mu M); from aqueous solutions. The effects of PS concentration and pH were investigated to optimize heterogeneous treatment systems. Negligible removals were obtained for both pollutants by individual applications of nanoparticles insert ignore into journalissuearticles values(1 g/L); and PS insert ignore into journalissuearticles values(1.00 mM);. PS activation with ZVI resulted in 59% insert ignore into journalissuearticles values(1.00 mM PS; 1 g/L ZVI; pH 5.0; 120 min); and 100% insert ignore into journalissuearticles values(0.75 mM PS; 1 g/L ZVI; pH 5.0; 80 min); 3,5-DCP and 2,4-DCA removals, respectively. The ZVA/PS treatment system gave rise to only 31% 3,5-DCP insert ignore into journalissuearticles values(1.00 mM PS; 1 g/L ZVA; pH 3.0; 120 min); and 47% 2,4DCA insert ignore into journalissuearticles values(0.25 mM PS; 1 g/L ZVA; pH 3.0; 120 min); removals. The pH decreases from 5.0 to 3.0 and from 3.0 to 1.5 enhanced contaminant removals for ZVI/PS and ZVA/PS treatments, respectively. Pollutant removal rates were in correlation with the consumption rates of the oxidants. Metal ion insert ignore into journalissuearticles values(Al, Fe); release increased in the presence of PS and with decreasing pH.
Keywords : 3, 5 dichlorophenol, 2, 4 dichloroaniline, advanced oxidation, sulfate radicals, persulfate activation with zero valent metals