本文利用榴莲壳和氯化高铁水热法制备具有磁性的榴莲碳,利用XRD、FTIR和SEM对榴莲碳进行结构表征,并研究榴莲碳对水体中四环素的吸附性能,以及水热反应温度、溶液pH和盐浓度等对榴莲碳吸附去除四环素性能的影响.结果表明,在水热温度170℃加热10 h条件下制备的榴莲碳D170具有明显的纳米片状和颗粒状结构,随着温度的升高,制备的榴莲碳XRD衍射峰增强,形成的结晶更好.吸附实验表明,随着水热制备温度的升高,制备的榴莲碳对四环素的吸附去除率呈降低趋势.榴莲碳对四环素的吸附热力学模型拟合表明:D170、D180和D200对水体中四环素的最大吸附容量分别为153.97 mg·g-1、80.26 mg·g-1和34.14 mg·g-1,其中D170对四环素的吸附效果最好,最佳吸附溶液pH值约为6.0,吸附热力学过程符合Freundich模型,吸附动力学过程符合假二级动力学模型.溶液中添加NaCl能促进榴莲碳对四环素的吸附作用,当NaCl浓度高于0.1 mol·L-1,榴莲碳对四环素的去除率达到100％;而添加Ca(N03)2可降低榴莲碳对四环素的吸附能力,当Ca(N03)2浓度从0.1 mol·L-1增加到1.0 mol· L-1时,水溶液中四环素的去除率从93％降低到78％.
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