Leming Zhen , Zhaofu Meng , Qiyuan Qin , Wenhui Liu , Na Sun , Jingbing Xue , Jialong Lv
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引用次数: 0
Abstract
The wide application of antibiotics and nanoparticles has made their coexistence in soil a new environmental problem, and the coexistence of multiple pollutants in soil may impact their environmental behaviour. In this study, by dividing soil into coarse particle (CP) and fine particle (FP) phases via differential centrifugation, oxytetracycline (OTC) and TiO2 nanoparticles (NPs) were selected as two typical pollutants to study their coadsorption behaviour on Lou soil. The coadsorption mechanism of OTC and TiO2 NPs on Lou soil was discussed through their morphology and characteristics by using SEM, XRD, BET specific surface, XPS and FT-IR analyses. The adsorption capacity of OTC on the FP phase was much greater than that on the CP phase. Hydrogen bonding and charge attraction are the main adsorption mechanisms of OTC on both the CP and FP phases. π-π interactions are another main adsorption mechanism of OTC sorption on the FP phase. Hydrogen bonding and charge attraction are the main mechanisms of TiO2 NPs sorption on soil. OTC and TiO2 NPs compete on the surface of soil particles through charge attraction and hydrogen bonding, thus inhibiting their adsorption.
期刊介绍:
Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena.
The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.