为了有效地去除印染废水中甲基橙(MO)等合成染料,以CO2和1,6-己二胺为原料,采用无催化剂、无脱水剂法制备了CO2基聚脲(CO2-PU)多孔材料,并对材料进行表征,研究了CO2-PU对MO的吸附性能和机理。结果表明:CO2-PU对MO具有良好的吸附性能,当pH为4,吸附时间为20min时,5mg CO2-PU对MO的吸附率和吸附量分别能达到96.4%和96.4mg/g,并且CO2-PU具有良好的循环使用性能。CO2-PU对MO的吸附过程符合准二级动力学模型,吸附行为与Langmuir吸附等温线模型一致。
In order to effectively remove methyl orange (MO) and other synthetic dyes from dyeing wastewater,CO2-based polyurea (CO2-PU) porous materials were prepared using CO2 and 1,6-hexanediamine as raw materials without catalyst and dehydrating agent.The materials were characterized,and the adsorption capacity and mechanism of CO2-PU for MO were investigated.The results showed that CO2-PU had good adsorption performance for MO.When the pH was 4 and the adsorption time was 20min,the adsorption efficiency and adsorption capacity of 5mg CO2-PU for MO could reach 96.4% and 96.4mg/g,respectively,and had good recycling performance.The adsorption process of CO2-PU for MO conformed to the pseudo-second-order kinetic model.The adsorption behavior was consistent with the Langmuir adsorption isotherm model.
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