Adsorption Interaction of Tetracyclines with Porous Synthetic Resins

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• 作者：Weiben Yang ; Fangfang Zheng ; Yipin Lu ; Xiaoxu Xue ; Na Li
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：December 21, 2011
• 年：2011
• 卷：50
• 期：24
• 页码：13892-13898
• 全文大小：908K
• 年卷期：v.50,no.24(December 21, 2011)
• ISSN：1520-5045

文摘

The presence of tetracycline antibiotics (TCs) in aquatic environments poses potential risks to human health and ecosystems. In the present study, hypercrosslinked resins MN-200 and NDA-150 and aminated polystyrene resins MN-150 and MN-100 were selected as adsorbents for removing two tetracyclines, TC and oxytetracycline, OTC, from aqueous solutions. Despite the different surface properties and pore structures of the resins, similar patterns of pH-dependent adsorption were observed. The TCs adsorption on the resins exhibited ionic strength dependence, which is consistent with their adsorption mechanism. OTC presented stronger adsorption at pH 2.0 compared with TC; this is ascribed to the enhancement by H-bonding. The proposed mechanisms for TCs adsorption at lower pH are dependent on H-bonding, hydrophobic effect, and 蟺鈥撓€ electron donor鈥揳cceptor (EDA) interaction, whereas those at higher pH are regarded as the coordination of 蟺鈥撓€ EDA interaction and hydrophobic effect. The findings indicate that the hypercrosslinked resin is a promising adsorbent for the removal of antibiotics from aqueous solutions.