双酚A(BPA)是一种典型的环境内分泌干扰物,可严重影响人和动物的生长和繁殖。采用溶剂蒸发法技术制备了醋酸纤维素复合膜吸附剂[CA-Ms(X)]。以醋酸纤维素膜(CA)作为比较对象,利用扫描电子显微镜(SEM)和傅里叶变换红外光谱(FT-IR)对CA-Ms(X)进行表征,并对其吸附动力学、吸附等温线及材料的重复利用性能进行了研究。结果表明:CA-Ms(X)经过720min达到吸附平衡,吸附过程符合准二级动力学模型及Langmuir吸附等温方程,理论最大吸附容量比CA吸附容量提高了4倍左右,循环使用5次后,其对BPA的去除效率基本上可以维持在70%左右。
As a typical endocrine disrupting chemicals,bisphenol A (BPA) can seriously disturb the growth and reproducing of human and animals.The Cellulose acetate composite membrane adsorbent[CA-Ms(X)] was synthesized by solvent evaporation method.The prepared CA-Ms(X) was characterized using SEM and FT-IR,and the characters of adsorption and repeatability were investigated comparing to cellulose acetate membrane(CA).The results showed that the adsorption equilibrium time was 720min.The equilibrium data fitted well to the pseudo-second-order kinetic and the Langmuir model for BPA binding onto CA-Ms(X),respectively.The theoretical maximum adsorption capacity of BPA was four times higher than that of CA.After 5 times of recycling,the removal efficiency of BPA was almost 70%.
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