Application of Synthesized Nanoscale Zero-Valent Iron in the Treatment ‎of Dye Solution Containing Basic Yellow 28‎‏ ‏

N ‎ anoscale zero-valent iron (NZVI) ‎particles were synthesized by the ‎aqueous phase borohydride ‎reduction method, and the ‎synthesized NZVI particles were ‎used for the degradation of Basic ‎Yellow 28 (BY28) dye in aqueous ‎solution. The influence of ‎experimental variables such as ‎reaction time, NZVI particle ‎dosage and pH were studied on the ‎decolorization of BY28. Mixing an ‎aqueous solution of 100 mg L?1 ‎BY28 with 2 g L-1 Fe0 resulted in ‎‎98.2% loss of BY28 within 15 min. ‎The color removal efficiency was ‎found to be increased with ‎decrease in initial pH of dye ‎solution and NZVI exhibited good ‎color removal efficiency at acidic ‎pH. Solvent extraction of the Fe0 ‎revealed that BY28 removal was ‎not through adsorption, but ‎through degradation, as Fe0 ‎treatment of BY28 lead to new ‎chromatographic peaks ‎‎(degradation products) in HPLC ‎analysis. Prog. Color Colorants ‎Coat. 5(2012), 35-40. © Institute ‎for Color Science and Technology.‎