颗粒活性炭对水中邻苯二甲酸二甲酯的吸附特性

 研究了颗粒活性炭(GAC)对水中邻苯二甲酸二甲酯(DMP)的静态与动态吸附特性.结果表明,Freundlich和Langmuir等温线模型可以较好的拟合GAC对DMP的吸附.GAC对DMP的吸附容量较大,溶液初始浓度为200mg/L时,GAC对DMP的动态和最大静态吸附容量分别为484.60,450.89mg/g.考察了不同流速条件下(0.65～4.00mL/min)GAC吸附DMP的穿透特性,Yoon-Nelson模型能很好地拟合DMP在GAC柱中的穿透曲线,根据试验数据和Yoon-Nelson模型计算出穿透参数K′、T和穿透点t1以及平衡点t2.在建立了进水流量与Yoon-Nelson穿透模型的参数之间的关系基础上,得到了活性炭柱出水浓度与进水流量和穿透时间之间的动态关系模型.

Adsorption characteristics of dimethyl phthalate in water by granular activated carbon

The static and dynamic adsorption characteristics of dimethyl phthalate(DMP)in water by granular activated carbon(GAC)were studied.The Freundlich and the Langmuir isotherm models could fit better the adsorption of DMP solution by activated carbon.The GAC had greater adsorption capacity on DMP.The dynamic and the maximum static adsorption capacity of GAC on DMP were 484.60,450.89mg/g,respectively,when the initial concentration of the solution was 200mg/L;meanwhile,the breakthrough characteristics of DMP adsorption by GAC under the condition of varying flow rates(0.65~4.00mL/min)was inspected.The Yoon-Nelson model could fit very well the breakthrough curves of DMP in GAC column.The breakthrough parameters K',T,breakthrough point(t1)and balance point(t2),were calculated based on the experimental data and Yoon-Nelson model.On the basis of building the relation between the influent flow(V)and the parameters of Yoon-Nelson breakthrough model,the dynamic relation model between the effluent concentration of GAC and influent flow amount and the breakthrough time was obtained.