以双丙酮丙烯酰胺改性的胺化聚氯乙烯(DAAMPV)树脂为吸附剂,考察了该树脂对对硝基苯酚的吸附性能。结果表明,DAAMPV树脂对对硝基苯酚有较快的动力学吸附速率,吸附过程符合拟二级动力学方程。随着温度的降低和对硝基苯酚质量浓度的增加,DAAMPV树脂的吸附量增大。在25℃、对硝基苯酚初始质量浓度为500mg/L的条件下,DAAMPV树脂对对硝基苯酚的吸附量为53.2mg/g,吸附过程符合Langmuir等温式。实验条件下,DAAMPV树脂对对硝基苯酚的去除率可达94.26%,吸附的对硝基苯酚可用无水乙醇或4% NaOH洗脱。
The adsorption property of polyvinyl chloride resin modified by diacetone acrylamide (DAAMPV) for p-nitrophenol was investigated.The results showed that kinetics adsorption rate was relatively fast.The adsorption kinetics could be well described by the pseudo-second order model.Adsorption capacity of DAAMPV for p-nitrophenol decreased with elevating temperature,and increased with increasing the concentration of p-nitrophenol.The optimum adsorption capacity of DAAMPV for p-nitrophenol was 53.2mg/g with initial p-nitrophenol concentration of 500mg/L at 25℃.The adsorption of p-nitrophenol fitted to Langmuir isotherm equation.The removal rate of DAAMPV for p-nitrophenol could reach 94.26%.p-nitrophenol adsorpbed by DAAMPV could be eluted with absolute ethanol or 4% NaOH aquous solution.
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基金资助
国家自然科学基金资助项目(21171085);山东省自然科学基金资助项目(ZR2010BM027)
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