College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, China.
College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, China E-mail:
Water Sci Technol. 2024 Jun;89(12):3309-3324. doi: 10.2166/wst.2024.180. Epub 2024 Jun 3.
Polyacrylamide (PAM) in environmental water has become a major problem in water pollution management due to its high molecular mass, high viscosity and non-absorption by soil. CoFeO with strong magnetic properties was prepared by solvent-thermal synthesis method and used as the catalyst for the removal on PAM in heterogeneous Electro-Fenton (EF) system. It showed that the removal efficiency of PAM by the heterogeneous EF system using CoFeO catalyst was 92.01% at pH 3 after 120 min. Further studies indicated that ·OH was the most significant active species for the removal of PAM, and the contribution of ·O and SO for the removal of PAM was less than 15%. The reusability test and XRD, XPS, FTIR analyses proved that the catalyst had good stability. After a repeated use for five times, the catalyst still had a high PAM removal rate and stable structure. The valence distribution and functional groups of the phase components of the catalyst did not change significantly before and after the reaction. The possible mechanism of catalyst activation of HO was deduced by mechanism investigation. The CoFeO is an efficient and promising catalyst for the removal of PAM wastewater.
聚丙烯酰胺（PAM）因其高分子质量、高粘度和不被土壤吸收而成为水污染管理中的一个主要问题。采用溶剂热合成法制备了具有强磁性的 CoFeO，并将其用作非均相电芬顿（EF）体系中去除 PAM 的催化剂。结果表明，在 pH 3 下，CoFeO 催化剂的非均相 EF 体系对 PAM 的去除率在 120 min 后达到 92.01%。进一步的研究表明，·OH 是去除 PAM 的最主要活性物质，·O 和 SO 对 PAM 的去除贡献小于 15%。重复使用五次的可重复使用性测试和 XRD、XPS、FTIR 分析证明了催化剂具有良好的稳定性。反应前后，催化剂的相组成的价态分布和官能团没有明显变化。通过机理研究推断了催化剂对 HO 的活化的可能机理。CoFeO 是去除 PAM 废水的一种高效、有前途的催化剂。
