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首页> 外文期刊>Journal of Applied Polymer Science >Preparation of metal ions impregnated polystyrene resins for adsorption of antibiotics contaminants in aquatic environment
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Preparation of metal ions impregnated polystyrene resins for adsorption of antibiotics contaminants in aquatic environment

机译：金属离子浸渍的聚苯乙烯树脂的制备，用于吸附水生环境中的抗生素污染物

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In this study, the strong-acid polystyrene resin 1)001 was modified by impregnation with metal ions Fe3+, Cu2+, and Zn2+ to prepare new kinds of sorbents. The modified D001 was characterized by N-2, sorption-desorption isotherms, X-ray powder diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The sorption performance of the metal modified resins for removal of antibiotics tetracycline (TC) and doxycycline (DC) from aquatic environment was investigated and excellent sorption capability with more than 98% removal ratio was observed for these resins after modification. Although these modified resins also presented pH-dependent sorption, they showed much better flexibility with pH fluctuation than those of the unmodified original D001, and extremely strong sorption capability was exhibited in a wide range of pH 2-8 for both TC and DC. Pseudo-second-order kinetic equation described the sorption process more reasonably than pseudo-first-order equation. Langmuir isotherm model provided the best match to the equilibrium data with monolayer maximum sorption capacity of 417-625 mg g(-1) under 288-318 K. The sorption capacity decreased with the increase of ionic strength of NaCl. The main sorption mechanism was proposed to be surface complexation, cation bridge interaction and electrostatic attraction/competition between antibiotics and metal modified resins. (C), 2014 Wiley Periodicals, Inc.
机译：在这项研究中，通过用金属离子Fe3 +，Cu2 +和Zn2 +浸渍改性强酸聚苯乙烯树脂1）001，以制备新型的吸附剂。改性的D001通过N-2，吸附-解吸等温线，X射线粉末衍射（XRD）和傅里叶变换红外光谱（FTIR）来表征。研究了金属改性树脂从水生环境中去除抗生素四环素（TC）和强力霉素（DC）的吸附性能，并观察到这些树脂在改性后具有优良的吸附能力，去除率超过98％。尽管这些改性树脂还表现出pH依赖性吸附，但它们在pH波动下表现出比未改性的原始D001更好的柔韧性，并且在TC和DC的广泛pH 2-8范围内都表现出极强的吸附能力。拟二阶动力学方程比拟一阶方程更合理地描述了吸附过程。 Langmuir等温模型在288-318 K下单层最大吸附容量为417-625 mg g（-1）时，提供了与平衡数据的最佳匹配。随着NaCl离子强度的增加，吸附容量下降。提出的主要吸附机理是抗生素与金属改性树脂之间的表面络合，阳离子桥相互作用和静电吸引/竞争。 （C），2014年，Wiley Periodicals，Inc.

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