Abstract Composites based on bentonite and chitin were prepared and its application for trimethoprim (TMP) adsorption from aqueous solution was investigated. Composites were characterized by ATR-FTIR, XRD, DSC and TGA. Characterization data revealed the intercalation of the chitin macromolecules into the bentonite interlayer. Several important parameters of TMP adsorption were explored including the composition of composites, pH medium, isotherms, contact time, and reused in batch experiments. Batch adsorption studies showed that TMP adsorption on composites increased with increase in bentonite content on composites and in acid medium. Langmuir adsorption model showed the best agreement with the experimental data used to describe adsorption isotherms. Langmuir isotherm indicated that the maximum adsorption capacity of TMP was 67 mg/g. Sectioned composite had around 100% adsorption capacity after three regeneration cycles.

中文翻译：

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基于甲壳素/膨润土的低成本和可再生复合材料用于吸附潜在的新兴污染物

摘要 制备了基于膨润土和甲壳素的复合材料，并研究了其在水溶液中吸附甲氧苄啶（TMP）的应用。通过 ATR-FTIR、XRD、DSC 和 TGA 对复合材料进行了表征。表征数据揭示了几丁质大分子嵌入到膨润土夹层中。探索了 TMP 吸附的几个重要参数，包括复合材料的组成、pH 介质、等温线、接触时间和在批量实验中的重复使用。批量吸附研究表明，随着复合材料和酸性介质中膨润土含量的增加，复合材料上的 TMP 吸附量增加。Langmuir 吸附模型显示出与用于描述吸附等温线的实验数据的最佳一致性。Langmuir 等温线表明 TMP 的最大吸附量为 67 mg/g。