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The Characterization and Amoxicillin Adsorption Activity of Mesopore CaCO3 Microparticles Prepared Using Rape Flower Pollen

1
Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Institute of Mineral Materials & Application, Sichuan Engineering Lab of Nonmetallic Mineral Powder Modification & High-quality Utilization, Center of Forecasting and Analysis, Southwest University of Science and Technology, Mianyang 621010, China
2
School of Chemistry and Chemical Engineering, Eastern Sichuan Sub-center of National Engineering Research Center for Municipal Wastewater Treatment and Reuse, Sichuan University of Arts and Science, Dazhou 635000, China
3
College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(4), 254; https://doi.org/10.3390/min9040254
Received: 29 March 2019 / Revised: 19 April 2019 / Accepted: 21 April 2019 / Published: 25 April 2019
(This article belongs to the Special Issue Nanomineralogy)
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Abstract

A precipitation reaction method was employed to prepare mesopore calcium carbonate (CaCO3) using rape flower pollen as the template. CaCO3 adsorbent was characterized using X-ray diffraction (XRD), scanning electronic microscopy (SEM), and Brunner−Emmet−Teller measurements (BET). The equilibrium adsorption data on amoxicillin were explained using Langmuir, Freundlich, and Temkin adsorption isotherm models. The pseudo-first order, second order, pseudo-second order, and intra-particle diffusion kinetic models were used to explore adsorption kinetics. Equilibrium adsorption of as-prepared CaCO3 was better depicted using the Langmuir adsorption model with an R2 of 0.9948. The separation factor (RL) was found to be in the range of 0 < RL < 1, indicating the favorable adsorption of amoxicillin. The adsorption capacity of mesopore CaCO3 reached 13.49 mg·g−1 in 0.2 g∙L−1 amoxicillin solution. The values of adsorption thermodynamic parameters (ΔHθ, ΔSθ, ΔGθ) were obtained. In addition, the adsorption process turned out to be endothermic and spontaneous for the CaCO3 product at 298 K, 308 K, and 318 K. View Full-Text
Keywords: calcium carbonate; mesopore; amoxicillin; adsorption; kinetics; thermodynamics calcium carbonate; mesopore; amoxicillin; adsorption; kinetics; thermodynamics
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Zhou, L.; Peng, T.; Sun, H.; Guo, X.; Fu, D. The Characterization and Amoxicillin Adsorption Activity of Mesopore CaCO3 Microparticles Prepared Using Rape Flower Pollen. Minerals 2019, 9, 254.

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