Zero-valent iron (ZVI)- and zero-valent aluminium (ZVA)-activated persulfate (PS) oxidation procedure was applied to remove the industrial pollutants 3,5-dichlorophenol (3,5-DCP; 12.27 μM) and 2,4-dichloroaniline (2,4-DCA; 12.34 μM) 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 (1 g/L) and PS (1.00 mM). PS activation with ZVI resulted in 59% (1.00 mM PS; 1 g/L ZVI; pH 5.0; 120 min) and 100% (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 (1.00 mM PS; 1 g/L ZVA; pH 3.0; 120 min) and 47% 2,4- DCA (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 (Al, Fe) release increased in the presence of PS and with decreasing pH.
UCUN, OLGA KOBA; MONTAZERİ, BAHAREH; ALATON, İDİL ARSLAN; and HANCI, TUĞBA ÖLMEZ
"Treatment of industrial contaminants with zero-valent iron- and zero-valent aluminiumactivatedpersulfate: a case study with 3,5-dichlorophenol and 2,4-dichloroaniline,"
Turkish Journal of Chemistry: Vol. 45:
2, Article 1.
Available at: https://journals.tubitak.gov.tr/chem/vol45/iss2/1