Mechanism of adsorption of tetracycline–Cu multi‐pollutants by graphene oxide (GO) and reduced graphene oxide (rGO). Issue 4 (10th December 2018)

• Record Type: Journal Article
• Authors: Zhao, Chuanqi; Hong, Peidong; Li, Yajuan; Song, Xiaoming; Wang, Yinggang; Yang, Yuesuo
• Is Part Of: Journal of chemical technology & biotechnology. Volume 94:Issue 4(2019)
• Page Start: 1176
• Page End: 1186
• Publication Date: 2018-12-10
• Subjects: tetracycline (TC) -- Cu2+ -- multi‐pollutants -- cooperative adsorption -- GO and rGO nanosheets; Biotechnology -- Periodicals; Chemistry, Technical -- Periodicals; Chemical engineering -- Periodicals; Industries -- Environmental aspects -- Periodicals; 660
• DOI: 10.1002/jctb.5864
• Languages: English
• ISSNs: 0268-2575

Abstract

Abstract: BACKGROUND: The adsorption of single pollutants onto graphene oxide (GO), such as heavy metals or organics, has been widely investigated, however, the simultaneous removal of the antibiotic–heavy metal multi‐pollutants from the intensive livestock and poultry industry has been investigated little. In this study, the GO/reduced GO(rGO) were prepared as adsorbent and the adsorption performance of tetracycline (TC), Cu 2+, and the multi‐pollutants TC–Cu were investigated. RESULTS: The GO surface was abundant in oxygen‐containing functional groups but was affected by a reduction effect, and thus rGO lost a large amount of –OH. In the presence of Cu 2+, GO's adsorption quantity of TC increased by 96.64%, which was considerably higher than the increase (23.31%) observed in the case of rGO. In contrast, the adsorptivity of GO/rGO in Cu 2+ increased slightly with the addition of TC. Further, X‐ray photoelectron spectroscopy (XPS) analysis revealed that the Cu 2+ participated in a bridging interaction between TC and the adsorbent, forming a complexation TC–Cu. CONCLUSION: GO and rGO showed favorable adsorption of TC, Cu 2+, and TC–Cu. The adsorption capacity of multi‐pollutants was increased compared with individual adsorption, indicating a cooperative adsorption between the TC and Cu 2+ . The adsorption mechanism mainly included π–π conjugation, electrostatic interactions, and the bridge connection by Cu 2+, which contributed to the performance of GO/rGO with respect to the adsorption of the antibiotic–heavy metal multi‐pollutants. © 2018 Society of Chemical Industry