Adsorption of zinc by activated carbons prepared from solvent extracted olive pulp

被引:90
作者
Galiatsatou, P
Metaxas, M
Kasselouri-Rigopoulou, V
机构
[1] Inst Technol Agr Prod, Lykovrissi 14123, Greece
[2] Natl Tech Univ Athens, Dept Chem Engn, GR-15773 Athens, Greece
关键词
zinc; adsorption; olive pulp; activated carbon; surface groups;
D O I
10.1016/S0304-3894(02)00008-0
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Activated carbons have been prepared by a two-step physical activation with steam at different burn-off levels to study the porosity development and its effect in zinc adsorption from aqueous solutions. The plain material used was the residual from the extraction with solvent of the kernel-oil [solvent extracted olive pulp (SEOP)]. Olive, apricot and peach stone have been also used as different precursors. The products were characterized by N-2 at 77 K adsorption, Hg porosimetry and iodine number determination. The influence of surface complexes and pH has been investigated in an attempt to elucidate the adsorption phenomena. The effect of different treatments [demineralization with H2SO4 and oxidation with (NH4)(2)S2O8] was also evaluated for the adsorption of zinc species. Both basic and acidic carbons, originated from SEOP, show remarkable adsorption ability at solution pH = 7. Their adsorption ability mainly depends on the content and nature of functional surface groups, the ash content of the precursors and the pH of the solution. These activated carbons were proved to be efficient adsorbents for the removal of water pollutants and contaminants. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:187 / 203
页数:17
相关论文
共 29 条
  • [1] AMES LL, 1962, AM MINERAL, V47
  • [2] [Anonymous], 2010, INT J PHARMACEUT, DOI DOI 10.1016/j.ijpharm.2010.02.006
  • [3] [Anonymous], AKTIVKOHLE IND ANWEN
  • [4] Bansal R.C., 1988, ACTIVE CARBON
  • [5] BARRER RM, 1956, P ROY SOC, V439, pA237
  • [6] Boehm H. P., 1966, ADV CATALYSIS, VXVI
  • [7] On a theory of the van der Waals adsorption of gases
    Brunauer, S
    Deming, LS
    Deming, WE
    Teller, E
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1940, 62 : 1723 - 1732
  • [8] Adsorption of gases in multimolecular layers
    Brunauer, S
    Emmett, PH
    Teller, E
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1938, 60 : 309 - 319
  • [9] Capelle A, 1983, ACTIVATED CARBON FAS
  • [10] Influence of surface ionization on the adsorption of aqueous zinc species by activated carbons
    Carrott, PJM
    Carrott, MMLR
    Nabais, JMV
    Ramalho, JPP
    [J]. CARBON, 1997, 35 (03) : 403 - 410