State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Qixia District, Nanjing, 210023, Jiangsu, People's Republic of China.
Sci Rep. 2021 Apr 22;11(1):8748. doi: 10.1038/s41598-021-83804-x.
Humic acid (HA) is the main component of organic matter in effluent from wastewater treatment. The effective removal of HA is significant. In this study, a novel catalyst was prepared using a transition metal oxide as the active component and AlO as a granular carrier. The mechanism of catalytic ozonation of HA under neutral pH conditions and its efficiency were investigated. Under the chosen conditions (an ozone concentration of 2.2 mg/L, 50 mg/L HA solution, catalyst dosage of 5 g/L and initial pH of 6.49), the Cu/Ce-AlO bimetallic catalyst led to 54.79% TOC removal rate after 30 min; the removal rate by ozone alone was only 20.49%. The characteristics of organic compounds determined by FT-IR and GC-MS showed that organic compounds were degraded significantly by the catalytic treatment. The addition of catalysts could effectively degrade toxic intermediates and reduce the acute toxicity produced by ozonation. Humic acid substances were largely removed and transformed into biodegradable intermediates. This study proposes a new and efficient ozonation catalyst for practical applications in advanced wastewater treatment.
腐殖酸（HA）是废水处理出水中有机物的主要成分。有效去除 HA 具有重要意义。本研究以过渡金属氧化物为活性组分，AlO 为颗粒载体，制备了一种新型催化剂。考察了中性 pH 条件下 HA 的催化臭氧化反应机制及其效率。在所选择的条件下（臭氧浓度为 2.2 mg/L、50 mg/L HA 溶液、催化剂用量为 5 g/L、初始 pH 值为 6.49），Cu/Ce-AlO 双金属催化剂在 30 min 后导致 TOC 去除率达到 54.79%；单独使用臭氧的去除率仅为 20.49%。FT-IR 和 GC-MS 确定的有机化合物特征表明，催化处理可显著降解有机化合物。添加催化剂可以有效降解有毒中间体，并降低臭氧氧化产生的急性毒性。腐殖酸物质大量去除并转化为可生物降解的中间体。本研究提出了一种新的、高效的臭氧催化剂，可实际应用于高级废水处理。
