利用气相氧化处理对沥青基球状活性炭(PSAC)进行氧化改性,考察了氧化改性气氛中氧含量、氧化时间和氧化温度对PSAC表面化学性能的影响.用氮气吸附法表征了PSAC的孔结构,并研究了改性前后PSAC对苯酚吸附性能的变化规律.结果表明:改性前后PSAC的孔结构变化不明显;当氧化改性气氛中氧含量为20%,氧化时间为5 h以及氧化温度分别为400 ℃和450 ℃时,沥青基球状活性炭的表面酸性官能团由0.11 meq/g分别增加到1.22 meq/g、1.60 meq/g,碱性官能团由0.52 meq/g分别减少到0.03 meq/g、0.02 meq/g;随着表面酸性官能团数量的逐渐增加,PSAC亲水性能逐渐增强,使得溶剂水对吸附位产生强烈的竞争吸附,最终导致PSAC对苯酚的吸附等温线由L型向S型转变.
参考文献
| [1] | Yoon S H;Park Y D;Mochida I .Preparation of carbonaceous spheres from suspensions of pitch materials[J].Carbon,1992,30(05):781-786. |
| [2] | Nakashima M.;Inagaki M.;Centeno TA.;Shimada S. .ON THE ADSORPTION OF CO2 BY MOLECULAR SIEVE CARBONS - VOLUMETRIC AND GRAVIMETRIC STUDIES[J].Carbon: An International Journal Sponsored by the American Carbon Society,1995(9):1301-1306. |
| [3] | Alexandroff E E.PBI saratoga new and improved CWU/66p chemical protective clothing system for aircrew application[A].Stockholm,Sweden,1989:63-70. |
| [4] | Chau-Jen Lee;Shih-Tong Hsu .Preparation of spherical encapsulation of activated carbons and their adsorption capacity of typical uremic toxins[J].Journal of Biomedical Materials Research,1990,24(02):243-258. |
| [5] | Kureha Kagaku;Kabushiki Kaisha .Method for the treatment of hemorrhoidal diseases[P].US,5562901,1996. |
| [6] | Radovic LR.;Ume JI.;Menendez JA.;Leon CALY.;Scaroni AW.;Silva IF. .AN EXPERIMENTAL AND THEORETICAL STUDY OF THE ADSORPTION OF AROMATICS POSSESSING ELECTRON-WITHDRAWING AND ELECTRON-DONATING FUNCTIONAL GROUPS BY CHEMICALLY MODIFIED ACTIVATED CARBONS[J].Carbon: An International Journal Sponsored by the American Carbon Society,1997(9):1339-1348. |
| [7] | W. Tanthapanichakoon;P. Ariyadejwanich;P. Japthong;K. Nakagawa;S.R. Mukai;H. Tamon .Adsorption-desorption characteristics of phenol and reactive dyes from aqueous solution on mesoporous activated carbon prepared from waste tires[J].Water research: A journal of the international water association,2005(7):1347-1353. |
| [8] | Zhichang Liu;Licheng Ling;Wenming Qiao et al.Effect of hydrogen on the mesopore development of pitch-based spherical activated carbon containing iron during activation by steam[J].Carbon,1999,37(12):2063-2066. |
| [9] | Zhichang Liu;Licheng Ling;Wenming Qiao .Effects of various metals and their loading methods on the mesopore formation in pitch-based spherical activated carbon[J].Carbon: An International Journal Sponsored by the American Carbon Society,1999(8):1333-1335. |
| [10] | Liu Zhichang;Ling Licheng;Qiao Wenming .Preparation of pitch-based spherical activated carbon with developed mesopore by the aid of ferrocene[J].Carbon: An International Journal Sponsored by the American Carbon Society,1999(4):663-667. |
| [11] | 吕春祥,李开喜,吕永根,梁晓怿,宋燕,凌立成,王占仁,国建琴.沥青基球状活性炭的医用性能评价[J].新型炭材料,2002(03):11-14. |
| [12] | 宋燕,凌立成,乔文明.沥青基球状活性炭对肌酐及维生素B12吸附行为的研究[J].新型炭材料,1998(04):19-22. |
| [13] | Sun JA.;Marsh H.;Obrien WS.;Crelling JC.;Hippo EJ. .ACTIVATED CARBON PRODUCED FROM AN ILLINOIS BASIN COAL[J].Carbon: An International Journal Sponsored by the American Carbon Society,1997(3):341-352. |
| [14] | Domingo-Garcia M.;Perez-Mendoza M.;Lopez-Garzon FJ. .Effect of some oxidation treatments on the textural characteristics and surface chemical nature of an activated carbon[J].Journal of Colloid and Interface Science,2000(2):233-240. |
| [15] | Morenocastilla C.;Mueden A.;Carrascomarin F. .THE CREATION OF ACID CARBON SURFACES BY TREATMENT WITH (NH4)(2)S2O8[J].Carbon: An International Journal Sponsored by the American Carbon Society,1997(10/11):1619-1626. |
| [16] | Tamon H.;Okazaki M. .INFLUENCE OF ACIDIC SURFACE OXIDES OF ACTIVATED CARBON ON GAS ADSORPTION CHARACTERISTICS[J].Carbon: An International Journal Sponsored by the American Carbon Society,1996(6):741-746. |
| [17] | 黄强,黄永秋,潘鼎.A Study on the Surface Structures of Viscose-based Activated Carbon Fiber by FT-IR Spectroscopy and XPS[J].东华大学学报(英文版),2004(01):57-62. |
| [18] | Giles C H;Mac Ewan T H;Nakhwa S N et al.Studies in adsorption.Part Ⅺ.A systems of classification of solution adsorption isotherms,and its use in diagnosis of adsorption mechanisms and in measurement of specific surface areas of solids[J].Journal of the Chemical Society,1960,10:3973-3993. |
| [19] | Mahajan O;Morena-Castilla C;Walker P .Surface-treated activated carbon for removal of phenol from water[J].Separation Science and Technology,1980,15(10):1733-1752. |
| [20] | W. Tanthapanichakoon;P. Ariyadejwanich;P. Japthong;K. Nakagawa;S.R. Mukai;H. Tamon .Adsorption-desorption characteristics of phenol and reactive dyes from aqueous solution on mesoporous activated carbon prepared from waste tires[J].Water research: A journal of the international water association,2005(7):1347-1353. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%