Liu Jingliang, Zhou Dongmei, Xu Zhaoyi, Zheng Shourong
School of Environmental Science, Nanjing XiaoZhuang University, Nanjing 211171, PR China; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, 71st East Beijing Road, Nanjing 210008, PR China.
Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, 71st East Beijing Road, Nanjing 210008, PR China.
Environ Pollut. 2017 Jul;226:379-384. doi: 10.1016/j.envpol.2017.03.063. Epub 2017 Apr 28.
The exposures of pharmaceutical antibiotics in water solution caused potential risks for ecological environment and human health. In the present study, porous covalent triazine frameworks (CTFs) were synthesized and the adsorption behavior of sulfamethoxazole (SMX) and tylosin (TL) was investigated. The CTFs were characterized by X-ray diffraction, transform infrared and N adsorption/desorption. Sulfamethoxazole displayed much stronger adsorption than tylosin on microporous CTF-1 adsorbent due to the pore-filling effect. While the adsorption of bulky tylosin on microporous CTF-1 was suppressed because of the size exclusion effect. Additionally, the porous CTF showed stronger adsorption affinity and faster adsorption kinetics than other porous adsorbents, which was attributed to wide pore size distribution and open pore structure. Findings in this study highlight the potential of using porous CTFs as a potential adsorbent to eliminate antibiotics from water, especially for selective adsorption of bulky molecular pollutant.
水溶液中药物抗生素的暴露对生态环境和人类健康造成潜在风险。在本研究中，合成了多孔共价三嗪框架（CTFs），并研究了磺胺甲恶唑（SMX）和泰乐菌素（TL）的吸附行为。通过X射线衍射、傅里叶变换红外光谱和N吸附/脱附对CTFs进行了表征。由于孔填充效应，磺胺甲恶唑在微孔CTF-1吸附剂上的吸附比泰乐菌素强得多。而由于尺寸排阻效应，大分子泰乐菌素在微孔CTF-1上的吸附受到抑制。此外，多孔CTF比其他多孔吸附剂表现出更强的吸附亲和力和更快的吸附动力学，这归因于其宽孔径分布和开放的孔结构。本研究结果突出了使用多孔CTFs作为潜在吸附剂从水中去除抗生素的潜力，特别是对于选择性吸附大分子污染物。
