Activated electric arc furnace slag as an efficient and reusable heterogeneous Fenton-like catalyst for the degradation of Reactive Black 5

作者：Nasuha N; Ismail S; Hameed B H

来源：Journal of the Taiwan Institute of Chemical Engineers, 2016, 67: 235-243.

DOI：10.1016/j.jtice.2016.07.023

• Recyclable catalyst
• Electric arc furnace slag
• Fenton-like reaction
• Reactive Black 5

This study aims to explore the feasibility of using iron slag derived from an electric arc furnace (EAFS) as a catalyst to degrade Reactive Black 5 (RB5). Raw EAFS (R-EAFS) subjected to 0.1 M NaOH solution treatment and thermal treatment was denoted as activated EAFS (A-EAFS). A-EAFS was characterized and examined for its capability to degrade RB5 in a dark-batch reaction under different catalyst dosages (0.01-0.06 g), H2O2 dosages (2-12 mM), initial pH values (2-7), initial concentrations (25-150 ppm), and reaction temperatures (303-323 K). The optimal conditions (94% within 60 min) for RB5 degradation were 0.2 g L-1, 8 mM H2O2, and pH 3. The degradation rate of A-EAFS for RB5 exceeded 94%, which was higher than that of R-EAFS. Recycling of A-EAFS after 10 reuses suggested that this stability is ascribed to the regeneration of the major constituent's ferrous ion magnetite and maghemite to decompose H2O2 into hydroxyl radical catalytically. Therefore, A-EAFS is an alternative heterogeneous catalyst in the abatement of organic dyes from polluted water through a heterogeneous Fenton-like reaction.

• 出版日期2016-10