中文摘要：

本文采用偏苯三酸酐修饰的超高交联吸附树脂（TMAMR）和羟丙基纤维素修饰的超高交联吸附树脂（HPCMR）作为吸附剂,以NDA150树脂作对照,研究了3种树脂对水中四环素的吸附性能和吸附机理,同时考察了p H值和Na＋浓度对TMAMR和HPCMR树脂吸附四环素的影响。结果表明,TMAMR和HPCMR树脂的比表面积较高,树脂表面修饰了大量的羟基,对四环素均具有较好的吸附性能。3种树脂对四环素的吸附量均随着温度的升高而增大,吸附过程中同时存在较强的物理吸附和化学吸附作用。Langmuir和Freundlich等温吸附方程均能够较好地拟合吸附等温线,吸附机理较复杂。吸附热力学结果表明,四环素在3种树脂上的吸附为自发的吸热过程,且吸附过程的熵增加。p H值对TMAMR和HPCMR树脂吸附四环素有较大的影响,在中性条件下,树脂对四环素的吸附量最大,在强酸和强碱条件下树脂的吸附量均较低。吸附液中加入无机盐后,发生盐析作用,导致TMAMR和HPCMR树脂对四环素的吸附量增大。

英文摘要：

The adsorption capacity and mechanism of tetracycline in aqueous solution on trimellitic anhydride modified hypercrosslinked resins （TMAMR）, hydroxypropyl cellulose modified hypercrosslinked resins （HPCMR） and hypercrosslinked resins （NDA150, used as contrast） were studied by isothermal experiments. The influence of solution pH and concentrations of inorganic salt on the adsorption of tetracycline on TMAMR and HPCMR were also observed. The results showed that TMAMR and HPCMR had higher surface area of 1083.9m2/g and 1059.3m2/g, respectively. Phenolic hydroxyl groups were modified on the resins surface. All of three resins had good adsorption capacity for tetracycline. The physical adsorption and chemical adsorption interaction coexisted in the process. Both Langmuir and Freundlich isotherm equation could fit the adsorption isotherm perfectly, which meant that the adsorption mechanism of tetracycline onto three types of resins was very complicated. Solution pH value had a remarkable effect on the adsorption performance of tetracycline on TMAMR and HPCMR. The resins had a higher adsorption capacity for tetracycline at neutral conditions and acidic conditions or alkaline conditions were unfavorable for adsorption. The salting-out effect of adding NaC1 and Na2SO4 was remarkable on increase of adsorption capacity of tetracycline on two types of resins. The thermodynamic experimental results showed that the adsorption was a spontaneously endothermic process with entropy increasing.