Abstract
We obtained the best sample of Steel Sludge Carbon-Sludge Carbon (SCS@SC0.5–800 °C), which was subsequently used as a catalyst to activate persulphate for the removal of phenol. The batch experimental results illustrate the phenol removal efficiency reached 98.8% and the constants were 0. 25515 min−1 in the optimal SCS@SC0.5–800 °C/persulfate system (SCS@SC0.5–800 °C = 0.4 g/L; persulfate = 2 mM; phenol = 20 mg/L; pH=7). Increasing the reaction temperature increases the effectiveness of the system in removing phenol, and cations have a slight inhibitory effect on the removal of phenol from the system. Repeatability tests showed that after the third cycle, the phenol removal rate decreased from 88.6% to 65.2%, and the kobs decreased from 0.12567 min−1 to 0.03105 min−1. These results may be explained by the fact that active ingredients such as Fe0 are constantly removed from the solution, reducing the efficiency of the degradation process. The removal mechanism suggests that phenol is enriched on the graphitic carbon surface and subsequently degraded by leaching Fe2+-activated persulfate to produce free radicals. This study details the preparation of optimal samples of this new green catalyst and broadens the scope and potential of the catalyst for practical applications.
Published Version
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