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环境化学  2015 

氯甲基化聚苯乙烯-间苯二胺树脂对Pb(Ⅱ)的吸附

Keywords: 间苯二胺,聚氯甲基化苯乙烯,,吸附

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Abstract:

聚氯甲基化苯乙烯(PS-CH2Cl)和间苯二胺(MPA)在相转移催化剂的作用下,合成聚氯甲基化苯乙烯间苯二胺树脂(PS-CH2-MPA),研究了PS-CH2-MPA对Pb(Ⅱ)的吸附性能,通过改变溶液的pH值、吸附温度、Pb(Ⅱ)的初始浓度、吸附时间等因素来探究树脂PS-CH2-MPA对Pb(Ⅱ)的吸附效果,实验结果表明,酸性范围内,吸附量随着pH的增加而增加,pH=6时,吸附效果最佳;PS-CH2-MPA对Pb(Ⅱ)的吸附速率较快,t=60min即可基本达到平衡;吸附过程能较好的吻合Freundlich等温吸附模型,且是放热过程,高温不利于吸附;对PS-CH2-MPA进行吸脱附实验,其吸附性能并未下降,是一种可以重复使用的吸附剂,所有结果表明PS-CH2-MPA在吸附Pb(Ⅱ)方面有着广阔的应用前景.

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