改性膨润土对苯酚和苯胺吸附规律的影响

The Research on Adsorptive Principles of Modified Bentonite Adsorbing both Phenol and Aniline

目的为了更有效地处理有机废水中的苯酚和苯胺,同时开发新型、高效和价廉的吸附剂.方法采用自制的改性膨润土作为吸附剂进行吸附实验,研究了在不同的pH值、吸附温度、初始质量浓度和吸附时间等条件下,改性膨润土吸附苯酚和苯胺单组分溶液的规律.结果改性膨润土对苯酚和苯胺的吸附量随着pH值的升高呈现下降的趋势;随着初始质量浓度的升高,吸附量呈现减小的趋势;随着吸附温度的升高,吸附量呈现下降的趋势;改性膨润土对苯酚的饱和吸附量约为2.1 mg/g,对苯胺的饱和吸附量约为3.7 mg/g.结论试验所得改性膨润土对苯酚和苯胺的吸附规律,可以为改性膨润土在水处理中的应用提供参考.

The purpose of this paper is to remove both phenol and aniline in waste water more effectively and in the meantime, to develop a new efficient economical adsorbent. The self- made modified bentonite is used in the experiment as the adsorbent to find out how it adsorbs the single- component solution of phenol and aniline respectively under the conditions of different pH values, different adsorptive temperature, different initial concentrations and different adsorptive time. The results show that the adsorptive capacities of modi- fied bentonite adsorbing both phenol and aniline decrease with the increase of pH values. Also, the adsorptive capacities decrease with the increase of the initial concentrations. Moreover, the adsorptive capacities decrease with the temperature rises. When the adsorption comes to saturation, the adsorptive capacities are 2. 1 mg/g and 3.7 mg/g respectively. Hence, the acquired adsorptive principles of modified bentonite may be used in water treatment for reference.