Adsorption and catalytic performance of pipe growth rings from water distribution networks using 5-BSA as the target pollutant. (December 2021)

• Record Type: Journal Article
• Authors: Huang, Wanyi; Yuan, Yixing; Zhong, Dan; Ma, Wencheng; Yuan, Yuan; Zhang, Peng
• Is Part Of: Chemosphere. Volume 284(2021)
• Publication Date: 2021-12
• Subjects: Pipe growth ring -- Phenolic halogenated DBPs -- Adsorption -- Heterogeneous fenton-like; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2021.131343
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: In this study, we investigated the use of pipe growth rings from water distribution networks as a catalyst in heterogeneous Fenton-like oxidation processes. The major constituents of real pipe growth rings (α- and γ-FeOOH) were prepared and considered as a simulated growth ring (SGR). Its performance in removing 5-bromosalicylic acid (5-BSA), a novel phenolic halogenated disinfection byproduct, was examined. SGR exhibited strong catalytic ability and a certain degree of adsorption capacity. Under acidic conditions, the adsorption and oxidation efficiencies were 32.65% and 87.67%, respectively. Furthermore, 72.19% of 5-BSA could be oxidized even at pH0 of 7. Kinetic characterizations at various temperatures revealed that both the adsorption and catalytic oxidation processes followed pseudo-second-order kinetic models and were surface-controlled with high activation energies (31.26 and 23.58 kJ mol −1, respectively). Ecotoxicity analyses of the transformation products (TPs) showed that the SGR/H2 O2 system could effectively reduce the toxicity of 5-BSA. Moreover, the number of iron ions leaching from SGR was below 0.1 mg L −1 in all experiments. The results of this study support further investigation of using real pipe growth rings in off-line water treatment, as well water network contamination remediation. Graphical abstract: Image 1 Highlights: The simulated pipe growth ring was used as the adsorbent and catalyst. 87.67% of 5-BSA was removed by SGR/H2 O2 system. Pseudo-second-order models fitted the adsorption and oxidation kinetic data well. The adsorption and oxidation processes had high activation energies. The toxicity of 5-BSA and its transformation products was effectively reduced.