Sorption characteristics of phenols on fly ash and impregnated fly ash
Sorption characteristics of phenols on fly ash and impregnated fly ash
复制标题
粉煤灰和浸渍粉煤灰对酚类物质的吸附特性
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
N. S. Rawat
中科院分区：
文献类型：
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作者：
B. Singh;N. Misra;N. S. Rawat
通过间歇振荡吸附实验，考察了飞灰(FA)和浸渍飞灰(IFA)对水溶液中苯酚的去除效果。苯酚的去除效率从9%到46%不等。浸渍飞灰(IFA)比飞灰(FA)具有更好的苯酚去除效果。结果表明，空间位阻较小的极性取代苯酚的吸附效果较好。带有受阻基团的取代苯酚的吸附比苯酚(间-硝基苯酚>；邻硝基苯酚>；苯酚>；间甲酚&邻甲酚)要小。吸附数据符合Freundlich吸附等温式。通过与金属氧化物的化学混凝，解释了苯酚的去除机理。
Batch shaking adsorption experiments were conducted to estimate potentiality of fly ash (FA) and impregnated fly ash (IFA) in removing phenols from aqueous solution. Efficiency of phenol removal varied from 9 to 46 percent. Impregnated fly ash (IFA) has shown better efficiency of phenol removal than fly ash (FA). It was observed that polar substituted phenols having less steric hindrance are better adsorbed than others. Substituted phenols with hindered group is less adsorbed than phenol (m-nitrophenol > o-nitrophenol > phenol > m-cresol > o-cresol). The adsorption data follow the Freundlich adsorption isotherm. The removal mechanism of phenols is explained due to chemical coagulation with metallic oxides