Heterogeneous Fenton degradation of bisphenol A catalyzed by efficient adsorptive Fe3O 4/GO nanocomposites
2014
Hua, Zulin | Ma, Wenqiang | Bai, Xue | Feng, Ranran | Yu, Lu | Zhang, Xiaoyuan | Dai, Zhangyan
A new method for the degradation of bisphenol A (BPA) in aqueous solution was developed. The oxidative degradation characteristics of BPA in a heterogeneous Fenton reaction catalyzed by Fe₃O₄/graphite oxide (GO) were studied. Transmission electron microscopic images showed that the Fe₃O₄nanoparticles were evenly distributed and were ∼6 nm in diameter. Experimental results suggested that BPA conversion was affected by several factors, such as the loading amount of Fe₃O₄/GO, pH, and initial H₂O₂concentration. In the system with 1.0 g L⁻¹of Fe₃O₄/GO and 20 mmol L⁻¹of H₂O₂, almost 90 % of BPA (20 mg L⁻¹) was degraded within 6 h at pH 6.0. Based on the degradation products identified by GC–MS, the degradation pathways of BPA were proposed. In addition, the reused catalyst Fe₃O₄/GO still retained its catalytic activity after three cycles, indicating that Fe₃O₄/GO had good stability and reusability. These results demonstrated that the heterogeneous Fenton reaction catalyzed by Fe₃O₄/GO is a promising advanced oxidation technology for the treatment of wastewater containing BPA.
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