Enhanced adsorption and colorimetric detection of tetracycline antibiotics by using functional phosphate/carbonate composite with nanoporous network coverage  

作　　者：Pratchayaporn Yukhajon Titikan Somboon Sira Sansuk 

机构地区：[1]Materials Chemistry Research Center,Department of Chemistry and Center of Excellence for Innovation in Chemistry,Faculty of Science,Khon Kaen University,Khon Kaen 40002,Thailand [2]Department of Chemistry,Faculty of Engineering,Rajamangala University of Technology Isan,Khon Kaen Campus,Khon Kaen 40000,Thailand

出　　处：《Journal of Environmental Sciences》2023年第4期365-377,共13页环境科学学报（英文版）

摘　　要：This work presents efficient tetracycline(TC) antibiotics adsorption using a functional porous phosphate/carbonate composite(PCC). The PCC was fabricated by anion-exchange of phosphate on the surface of vaterite-phase calcium carbonate particle scaffolds. The PCC,having dense nanoporous network coverage with large surface area and pore volume, exhibited excellent TC adsorption in solution. Its adsorption isotherm fitted well to the Freundlich model, with a maximum adsorption capacity of 118.72 mg/g. The adsorption process was spontaneous, endothermic, and followed pseudo-second-order kinetics. From the XPS analysis, the hydrogen bonding and surface complexation were the key interactions in the process. In addition, a colorimetric TC detection method was developed considering its complexation with phosphate ions, originating from PCC dissolution, during adsorption.The method was used to detect TC in mg/L concentrations in water samples. Thus, the multifunctional PCC exhibited potential for use in TC removal and environmental remediation.

关 键 词：Porous composite Calcium carbonate TETRACYCLINE ADSORPTION Colorimetric detection Surface complexation 

分 类 号：X832[环境科学与工程—环境工程] O647.3[理学—物理化学] O657.3[理学—化学]