李秉正,吴慧媛,杨颖超,徐传航,付万蕾

• 1:太原科技大学环境与安全学院

摘要(Abstract)：

通过Fe(NO_3)_3处理改变活性炭毡的结构和性质得到若干改性活性炭毡,采用氮气吸附法、傅里叶红外光谱法、Boehm滴定法、热重分析法表征吸附剂内在结构特征及表面官能团。以苯酚为吸附质,调变吸附时间、浓度研究吸附剂的苯酚吸附行为,并分别采用Langmuir、Freundlich和Temkin模型拟合和比较。研究表明,Fe(NO_3)_3处理降低活性炭毡的热稳定性。Fe(NO_3)_3处理降低活性炭毡的比表面积和孔容,但Fe(NO_3)_3处理前后活性炭毡的微孔孔容和比表面积仍显著大于活性炭。同时增加了大量表面酸性含氧官能团(主要为羧基)。处理前后的活性炭毡和活性炭的吸附过程均包括快速吸附、慢速吸附和吸附平衡阶段;活性炭毡系列样品吸附速率、吸附量均分别高于活性炭。活性炭毡平衡吸附量随Fe(NO_3)_3负载量增大而减少,是由于活性炭毡结构和/或表面含氧官能团单独或共同影响所致。活性炭毡表面含氧官能团抑制了吸附。苯酚吸附过程满足Langmuir方程。

关键词(KeyWords)： 活性炭毡;Fe(NO_3)_3处理;苯酚;吸附;模型拟合

Abstract:

Keywords:

基金项目(Foundation): 山西省回国留学人员科研资助项目(2014059);; 太原科技大学博士科研启动基金(20182057)

作者(Author): 李秉正,吴慧媛,杨颖超,徐传航,付万蕾

参考文献(References)：

• [1]方梦祥，姚鹏，岑建孟，等．活性炭吸附处理含酚废水的研究进展[J]．化工进展，2018,37(2):744-751.
• [2]姜军清，黄卫红，陆晓华．活性炭纤维处理含酚废水的研究[J]．工业水处理，2001,21(3):20-22.
• [3] HAYDAR S,FERRO-GARCA M A,RIVERA-UTRILLA J,et al. Adsorption of p-nitrophenol on an activated carbon with different oxidations[J]. Carbon,2003,41:387-395.
• [4] LI B Z,LEI Z P,ZHANG X H,et al. Adsorption of simple aromatics from aqueous solutions on modified activated carbon fiber[J]. Catalysis Today,2010,158:515-520.
• [5] ARSHADI M,MEHRAVAR M,AMIRI M,et al. Synthesis and adsorption characteristics of an heterogenized manganese nanoadsorbent towards methyl orange[J]. Journal of Colloid and Interface Science,2015,440:189-197.
• [6] LI B Z,SUN K Q,GUO Y B,et al. Adsorption kinetics of phenol from water on Fe/AC[J]. Fuel,2013,110:99-106.
• [7] LI B Z,QIAO X Z,ZHENG W,et al. Fe-doped activated carbon for removal of phenol from water[J]. Fresenius Environmental Bulletin,2015,24:96-102.
• [8] LI B Z,WU H Y,ZHANG C,et al. Dual functional Fe/AC for treating phenol solutions by adsorption coupled with dry catalytic oxidation technology[J]. Desalination and water treatment,2019,165:148-162.
• [9] FRANZ M,ARAFAT H,PINTO N. Effect of chemical surface heterogeneity on the adsorption mechanism of dissolved aromatics on activated carbon[J]. Carbon,2000,38(13):1807-1819.
• [10] BEDIN K,MARTINS A,CAZETTA A,et al. KOH-activated carbon prepared from sucrose spherical carbon:Adsorption equilibrium,kinetic and thermodynamic studies for Methylene Blue removal[J]. Chemical Engineering Journal,2016,286:476-484.
• [11] MCKAY G,BLAIR H,GARDNER J. Adsorption of dyes on chitin-1:equilibrium studies[J]. Journal of Applied Polymer Science,1982,27:3043-3057.
• [12] LI S M,ZENG Z X,XUE W L. Adsorption of lead ion from aqueous solution by modified walnut shell:kinetics and thermodynamics.[J]. Environmental Technology,2019,14:1810-1820.