The simultaneous removal of bisphenol A, manganese and ammonium from groundwater by MeOx: the role of chemical catalytic oxidation for bisphenol A. Issue 2 (2nd September 2021)

• Record Type: Journal Article
• Authors: Guo, Yingming; Ma, Ben; Huang, Jianxiong; Yang, Jing; Zhang, Ruifeng
• Is Part Of: Water Supply. Volume 22:Issue 2(2022)
• Page Start: 2106
• Page End: 2116
• Publication Date: 2021-09-02
• Subjects: BPA -- catalytic oxidation -- C-containing intermediate -- MeOx -- Mn2+ and NH4+
• DOI: 10.2166/ws.2021.295
• Languages: English
• ISSNs: 1606-9749

Abstract

Abstract: Iron and manganese oxide filter film (MeOx ) was used to research the simultaneous removal of bisphenol A (BPA), manganese (Mn 2+ ) and ammonium (NH4 + ) in a pilot-scale filter system. We found that 0.52 mg/L of BPA could be removed while consuming 5.44 mg/L of dissolved oxygen (DO). Since the oxidation process of NH4 + and BPA both consume the DO in water, the presence of NH4 + can hinder the removal of BPA. The presence of Mn 2+ in water had a synergistic effect on BPA removal. The filter film was characterized by SEM, XRD and XPS. Some substances were generated to block the pores of the oxide film, and a small amount of film was found to crack and fall off. The elemental composition of C and O were both increased by about 9.00%, the composition of Mn was decreased from 63.48% to 44.55%, and the reduced manganese substance might affect the activity of the oxide film. The main chemical forms of MeOx were Mn6 O12 ·3H2 O, MnFe2 O4 and Mn3 O4 . The decrease in the removal efficiency of BPA was mainly due to the C-containing intermediate [−CH2 C − H(OH)] n covering the surface of the oxide film and blocking the pore size of the film. HIGHLIGHTS: NH4 +, Mn 2+ and BPA from groundwater could be simultaneously removed by MeOx . NH4 + would hinder the removal of BPA because of the competition of DO. Mn 2+ has a synergistic effect on the removal of BPA by MeOx . Intermediate substances in the catalytic oxidation process of BPA were proposed. Graphical Abstract