『Abstract
　In the present study, the applications of mesoporous materials based on silica, namely post-synthesized, one-pot synthesized, and pure MCM-41, were investigated for the removal of phosphate from aqueous solution. The mesostructures were confirmed by X-ray diffraction, Brunauer-Emmett-Teller, Fourier transform spectroscopy, and transmission electron microscopy. The absorptions of phosphate by the mesoporous adsorbents were examined, with different adsorption models used to describe the equilibrium and kinetic data. The maximum adsorption capacities of the mesostructure adsorbents were found to be 45.162, 40.806, and 31.123 mg g^-1 for the post-synthesized, one-pot synthesized, and pure MCM-41, respectively. The kinetic data showed that the adsorptions of phosphate onto the post-synthesized and pure MCM-41 followed the pseudo-first-order kinetic model, whereas the one-pot synthesized adsorbent was described by the pseudo-second-order model.

Keywords: Amine-functionalized; Mesostructure; Phosphate; Post-synthesis; One-pot synthesis』

1. Introduction
2. Materials and methods
　2.1. Chemicals
　2.2. Pure MCM-41
　2.3. Amino-functionalized MCM-41 post-synthesis grafting method
　2.4. Amino-functionalized MCM-41 via direct co-condensed method
　2.5. Experimental process and adsorption model
　　2.5.1. Equilibrium adsorption test
　　2.5.2. Kinetic adsorption test
　　2.5.3. Modeling of adsorption isotherm
　2.6. Analytical methods
　　2.6.1. Characterization of the mesostructures
　　2.6.2. Phosphate measurement
3. Results and discussion
　3.1. Characterization of adsorbents
　3.2. Equilibrium adsorption
　3.3. Adsorption kinetics
　3.4. Phosphate removal efficiencies of the post-synthesized, one-pot synthesized and pure MCM-41
4. Conclusions
Acknowledgment
References