In the study ,the bisphenol A (BPA) adsorption behavior onto multi‐walled carbon nanotubes (MWCNT) ,activated carbon (AC) and graphite (G) was conducted .The thermo‐dynamics and dynamics for BPA adsorption onto adsorbent were also studied ,and adsorption mechanism was discussed .Adsorption experiments results showed that the adsorption ca‐pacity of BPA onto AC was highest 527 .03 mg/g ,and the amount of BPA adsorption onto G was only 14 .32 mg/g .The adsorption amount of BPA was reduced with an increase of tem‐perature ,indicating of an exothermic reaction .Adsorption isotherm of BPA onto adsorbent could be well fitted by langmuir model ,and BPA adsorption was an advantageous adsorption . The pseudo‐second‐order kinetics could fit BPA adsorption onto MWCNT and AC very well ,w hile BPA adsorption onto G could be described with pseudo‐first‐order kinetic model and the adsorption process was affected by boundary diffusion .No obvious change of BPA ad‐sorption onto adsorbent was observed at pH below 8 ,while BPA adsorption onto adsorbent was decreased with the increased pH at pH above 8 .%以碳纳米管（MWCNT）、活性炭（AC）和石墨（G）为吸附剂，研究了其对水中双酚A （BPA ）的吸附性能，探讨了三种吸附剂对水中BPA 的吸附热力学和动力学规律，分析其吸附机理．结果表明：AC对BPA的吸附效果最好，理论最大吸附量可达553．18 mg／g ，G对BPA的吸附量最低，理论最大吸附量为17．80 mg／g ．此外，随着温度的升高，BPA 在三种吸附剂上的吸附量都逐渐降低，吸附行为为放热过程；三种吸附剂对BPA的吸附等温线均可用Lang‐muir等温线方程拟合，吸附过程为有利吸附．BPA在MWCNT和AC上的吸附动力学可用拟二级动力学方程更好的拟合，G对BPA的吸附更符合拟一级动力学方程，且在其吸附过程中都会受到边界层扩散的影响．当pH＜8时，三种吸附剂对BPA 的吸附均随pH的变化不大，但当pH＞8时，随着溶液pH的增大，BPA在三种吸附剂上的吸附量明显降低．
展开▼
