木质柱状活性炭电化学再生过程微观结构演变研究

Study on Microstructure Evolution of Electrochemical Regeneration Process of Wood Columnar Activated Carbon

以2,4-二硝基甲苯(2,4-DNT)溶液为目标污染物,以来自五种厂家活性炭为吸附剂,考察了再生时间对不同饱和活性炭电化学再生效率的影响。通过BET、FTIR等技术对电化学再生前后的活性炭微观形貌进行表征。结果表明,在电化学再生条件相同的情况下,来自环盛炭业有限公司活性炭电化学再生效率较高,在5h内可达到93.5%。活性炭在再生过程中产生较多的含氧官能团,如羧基、羟基。比表面积随着再生时间增加而增加,其中,环盛炭业活性炭最高可达656.33m^2/g。活性炭总孔容随着再生时间增加而增加,其中,环盛炭业活性炭总孔容可达0.4364cm^3/g。

Taking 2,4-dinitrotoluene(2,4-dnt)solution as the target pollutant and 5 kinds of activated carbon from five manufacturers as adsorbents,the effects of different regeneration time on electrochemical regeneration efficiency of saturated activated carbon were investigated.The microstructure of activated carbon before and after electrochemical regeneration was characterized by BET,FTIR and other techniques.The results showed that under the same conditions of electrochemical regeneration,the electrochemical regeneration efficiency of activated carbon from huansheng carbon industry co.,LTD was higher,reaching 93.5% within 5 hours.Activated carbon generates more oxygen-containing functional groups,such as carboxyl group and hydroxyl group,in the regeneration process.The specific surface area increased with the regeneration time,among which,the maximum activated carbon in huansheng charcoal industry could reach 656.33m^2/g.The total pore capacity of activated carbon increases with the regeneration time,among which,the total pore capacity of activated carbon in huansheng industry can reach 0.4364cm^3/g.