1. The adsorption performance and micro-mechanism of MoS2/montmorillonite composite to atenolol and acebutolol: Adsorption experiments and a novel visual study of interaction.
- Author
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Shi, Wenyan, Chu, Yuting, Xia, Mingzhu, Wang, Fengyun, and Fu, Chenlu
- Subjects
MONTMORILLONITE ,SURFACE area measurement ,ADSORPTION (Chemistry) ,HYDROGEN bonding interactions ,X-ray photoelectron spectroscopy ,ADSORPTION capacity - Abstract
MoS 2 /montmorillonite (MoS 2 /Mt) composite was successfully synthesized through a simple hydrothermal method, and its adsorption performance for two emerging contaminants-atenolol (ATE) and acebutolol (ACE) was researched. The batch experiments revealed that the adsorption process can be described by the Pseudo-second order model and Langmuir model, and the adsorption capacity of MoS 2 /Mt, MoS 2 and Mt for ATE were 132.08 mg/g, 60.68 mg/g and 74.23 mg/g, for ACE were 113.82 mg/g, 33.01 mg/g and 36.05 mg/g, respectively. Besides, Fourier-transform infrared spectroscopy (FTIR), BET specific surface area measurement and X-ray photoelectron spectroscopy (XPS) were also employed to analyze the adsorption mechanism. Moreover, quantitative molecular surface analysis and weak intermolecular interaction analysis with independent gradient model were combined to probe the microscopic interaction between the adsorbent and adsorbate. The results indicated the interactions included hydrogen bonding and vdW interaction. Mt and MoS 2 interacted more strongly with ATE than ACE, which revealed the reason MoS 2 /Mt, Mt and MoS 2 possessed higher adsorption capacity for ATE. [Display omitted] • MoS 2 /Mt composite was successfully synthesized. • Compared with MoS 2 and MT, MoS 2 /Mt has better adsorption capacity for ATE and ACE. • Adsorption capacity of MoS 2 /Mt composite for ATE is larger than that for ACE. • The adsorption of ATE and ACE on MoS 2 /Mt was fitted to the Langmuir model. • Interactions of MoS 2 /Mt with ATE or ACE include hydrogen bonding and vdW interaction. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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