Surface hydroxyl-riched calcium carbonate and copper oxide composites for Fenton-like removal of bisphenol A

• Published in: Separation and purification technology 2023-03, Vol.308, p.122912, Article 122912
• Main Authors: Ding, Yichen, Zuo, Shiyu, Guan, Zeyu, Ding, Su, Li, Dongya
• Format: Article
• Language: English
• Subjects: CaCO3; CuO; Peroxymonosulfate; Surface hydroxyl groups
• ISSN: 1383-5866; 1873-3794
• DOI: 10.1016/j.seppur.2022.122912

[Display omitted] •Surface hydroxyl-riched CaCO3@CuO activates PMS to efficiently remove BPA.•Surface hydroxyl groups accelerate PMS adsorption and activation.•The system shows good adaptability in the complex water environment.•The removal of BPA is mediated by 1O2 and direct electron transfer. Surface functional groups have a key role in the removal of contaminants by advanced oxidation technology. Here, we explored the role of surface hydroxyl groups on pollutant removal by constructing novel surface hydroxyl-riched CaCO3@CuO. The hydroxyl groups on the surface of the composite accelerated the adsorption between the peroxymonosulfate and the catalyst, accelerating the catalytic reaction, and the kinetic removal rate of bisphenol A increased by 2.76 times. 1O2 is the dominant reactive oxygen species in the CaCO3@CuO/PMS/BPA system. The system has wide pH adaptability (pH = 3–11), good tolerance to complex water environments. This study provides novel insights into the mechanism of polymerization by surface hydroxyl groups in Fenton-like reactions for contaminant removal.