NDA-66树脂处理DBP生产废水及吸附行为

Treatment of DBP production wastewater with NDA-66 resin and adsorption behavior

通过等温吸附试验,研究了超高交联树脂NDA-66对邻苯二甲酸（ο-PA）的吸附性能及吸附行为,同时优化了NDA-66处理增塑剂DBP生产废水吸附-脱附工艺参数。经过初步筛选发现,NDA-66树脂对ο-PA具有良好的吸附性能,在温度为15℃、30℃和45℃条件下分别测定了吸附平衡数据,ο-PA在NDA-66树脂上的吸附平衡符合Freundlich等温吸附方程,温度对吸附的影响较大。参数优化试验结果表明：树脂吸附最佳工艺参数是：pH 2.0~2.4,温度30℃,流速为1.5 BV/h;树脂脱附最佳工艺参数,脱附剂用量及组成为1 BV 8%NaOH＋2 BV H_2O,脱附温度为55℃,脱附流速为1.5 BV/h。

The adsorption properties and behavior of hyper-crosslinked resin NDA-66 with regard to o-phthalic acid（ ο-PA） were studied through an isothermal adsorption experiment. Meanwhile, the adsorption-desorption processing parameters of the NDA-66 resin in treating DBP production wastewater were optimized. Through preliminary selection,the NDA-66 resin was found to perform strongly in adsorption of ο-PA. The adsorption equilibrium data were detected at temperatures of 15℃,30℃,and 45℃,respectively. The results show that the adsorption equilibrium data agreed with the Freundlich isotherm,and the temperature had a large influence on the adsorption process. The parameter optimization experiment shows that the optimal adsorption parameters of the NDA-66 resin are as follows： a pH value between 2.0 and 2.4,a temperature of 30℃,and a flow rate of 1.5 BV / h; and the optimal desorption parameters of the NDA-66 resin are as follows： a desorption agent amount and composition of1 BV 8% NaOH and 2 BV H_2O,a temperature of 55℃,and a desorption rate of 1.5 BV / h.