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环境化学  2015 

铁掺杂介孔氧化硅-石墨化炭复合物对橙黄Ⅱ的吸附

Keywords: 吸附,介孔吸附剂,表面官能化,石墨化炭,橙黄Ⅱ

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Abstract:

利用水热法合成铁掺杂介孔氧化硅-石墨化炭复合物(FeMS),并对其进行结构表征,发现其具有介孔结构,且高铁含量的FeMS含有明显的石墨化炭物种.比较了传统吸附剂活性炭、SBA-15及FeMS分别对橙黄Ⅱ的吸附性能,考察了初始pH、投加量、初始浓度、吸附时间对吸附的影响,并对吸附过程进行了动力学研究和吸附等温模型的模拟.结果表明FeMS对橙黄Ⅱ有很好的吸附性能,且高铁含量的FeMS吸附量优于低铁含量;FeMS吸附橙黄Ⅱ的最佳pH值为7,最高吸附量能达到1108mg·g-1;初始浓度对橙黄Ⅱ吸附效率有明显的影响;对低浓度的橙黄Ⅱ,可在120min内达到吸附平衡;FeMS对橙黄Ⅱ的吸附动力学数据符合准二级动力学模型;FeMS对低浓度橙黄Ⅱ的吸附符合Henry等温模型,饱和吸附量与橙黄Ⅱ的浓度有关.

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