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采用NaHSO3/H2O2氧化还原引发体系,以甲基丙烯酸、丙烯酰胺为混合单体,合成了玉米芯接枝共聚物。研究了玉米芯接枝共聚物对Cu(Ⅱ)的吸附性能,详细考察了溶液初始酸度、时间、金属离子初始浓度、温度以及吸附剂的碱化处理对吸附性能的影响,结果表明:在pH低于4时,酸度对吸附性能影响显著;吸附速率快,在20min左右就能达吸附平衡;Cu(Ⅱ)初始浓度的增加及温度的升高有利于吸附的进行;碱化处理可使吸附量提高数倍。此外,吸附热力学的研究表明,该吸附过程是吸热过程。
The NaHSO3 / H2O2 redox initiator system was used to synthesize corncob graft copolymer with methacrylic acid and acrylamide as monomer. The effects of the initial acidity and time of the solution, the initial concentration of the metal ions, the temperature and the alkalization of the adsorbent on the adsorption performance were studied. The results showed that the adsorption capacity of the corncob graft copolymer at pH Below 4, the acidity has a significant effect on the adsorption performance; the adsorption rate is fast and adsorption equilibrium can be reached in about 20min; the initial concentration of Cu (II) and the increase of temperature are favorable for the adsorption; the alkalization can make the adsorption Increased several times. In addition, adsorption thermodynamics studies show that the adsorption process is an endothermic process.