Anhui Advanced Technology Research Institute of Green Building, Anhui Jianzhu University, Hefei, 230601, PR China.
School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei, 230601, PR China.
Environ Sci Pollut Res Int. 2024 Sep;31(44):55996-56007. doi: 10.1007/s11356-024-34811-8. Epub 2024 Sep 9.
Herein, a novel graphite/sulfur iron tailing composite was applied as a peroxydisulfate (PDS) activator for rhodamine B (RhB) degradation in the water. The superior catalytic efficiency of graphite/sulfur iron tailing was achieved through radical (SO and •OH) and non-radical (O) processes according to the radical quenching experiments and electron paramagnetic resonance analysis. The carbonyl group and Fe species were the main active sites on the surface of graphite/sulfur iron tailing, which was demonstrated by combining Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and reaction kinetic experiments, and a possible degradation mechanism was also proposed. Overall, activated with 0.30 g/L of C-1, PDS achieved a 94.8% removal rate for RhB and maintained a removal rate of over 85% even after five consecutive operation cycles, and this study will benefit the application of iron/carbon composite materials in practical water treatment.
在此，将一种新型的石墨/硫铁矿尾渣复合材料用作过二硫酸盐（PDS）活化剂，用于水中罗丹明 B（RhB）的降解。通过自由基（SO 和 •OH）和非自由基（O）过程的自由基猝灭实验和电子顺磁共振分析，实现了石墨/硫铁矿尾渣的优异催化效率。通过结合傅里叶变换红外光谱（FT-IR）、X 射线光电子能谱（XPS）和反应动力学实验，证明了石墨/硫铁矿尾渣表面的羰基基团和 Fe 物种是主要的活性位，提出了一种可能的降解机制。总体而言，在 0.30 g/L 的 C-1 作用下，PDS 对 RhB 的去除率达到 94.8%，即使在连续进行五个操作循环后，去除率仍保持在 85%以上，这项研究将有利于铁/碳复合材料在实际水处理中的应用。
