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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基金资助
北京服装学院高水平教师队伍建设专项资金资助项目(BIFTXJ201924);北京市教育委员会科研计划项目资助(KM202110012005);北京市长城学者培育计划(CTT＆TCD20180321)
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