大孔树脂RD-100静态吸附废水中邻硝基氯苯和邻硝基苯酚Static adsorption of 2-nitrochlorobenzene and 2-nitrophenol from wastewater by macroporous resin RD-100
刘堂林,彭阳峰,赵红亮,童天中
摘要(Abstract):
为了从生产1-羟基苯并三氮唑的废水中去除邻硝基氯苯(OCNB)和邻硝基苯酚(ONP),比较了6种大孔吸附树脂的吸附性能,筛选出吸附能力最优的大孔吸附树脂RD-100。静态吸附动力学研究显示,该树脂对OCNB和ONP的吸附动力学符合准一级模型,吸附过程符合Freundlich模型,即为多分子层吸附过程,对OCNB和ONP的最大理论吸附量分别为1 087.0 mg·g~(-1)和574.7 mg·g~(-1)。热力学研究表明,树脂吸附OCNB为吸热过程(ΔH=88.5 kJ·mol~(-1)),吸附ONP为放热过程(ΔH=-2.1 kJ·mol~(-1)),静态吸附循环再生6次后吸附容量仅衰减5.5%(OCNB)和6.2%(ONP)。单组分动态吸附的穿透点(C_t/C_0=5%)为420 min(ONP)和580 min(OCNB)。
关键词(KeyWords): 大孔吸附树脂RD-100;邻硝基氯苯;邻硝基苯酚;吸附;废水处理
基金项目(Foundation):
作者(Author): 刘堂林,彭阳峰,赵红亮,童天中
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