Sorptive removal of trivalent and hexavalent chromium from binary aqueous solutions by composite alginate-goethite beads

被引：132
作者：
Lazaridis, NK [1 ]
Charalambous, C [1 ]
机构：
[1] Aristotle Univ Thessaloniki, Sch Chem, Div Chem Technol, GR-54124 Thessaloniki, Greece
来源：
WATER RESEARCH | 2005年 / 39卷 / 18期
关键词：
isotherms; kinetics; homogeneous kinetic model; shrinking core model;
D O I：
10.1016/j.watres.2005.09.013
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In this study, the removal of hexavalent and trivalent chromium ions from binary aqueous solutions by composite alginate-goethite beads was investigated in a batch mode. Equilibrium sorption experiments were carried out at different temperatures and pH values. The data were correlated with Langmuir and Freundlich equations. The thermodynamic parameters calculated were: change in free energy, in enthalpy, in entropy and the heat of adsorption. The influence of mixing rate, sorbent concentration and sorbent particle size was studied at kinetic runs. The effective diffusion coefficients were evaluated by employing the homogeneous diffusion model and the shrinking core model for hexavalent and trivalent chromium, respectively. Desorption experiments were conducted by employing various eluants showed that the loaded material could be regenerated satisfactorily. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4385 / 4396
页数：12
相关论文
共 38 条
  • [1] [Anonymous], 2005, STANDARD METHODS EXA, V21st
  • [2] Trivalent chromium sorption on alginate beads
    Araujo, MM
    Teixeira, JA
    [J]. INTERNATIONAL BIODETERIORATION & BIODEGRADATION, 1997, 40 (01) : 63 - 74
  • [3] Bai RS, 2003, BIORESOURCE TECHNOL, V87, P17, DOI 10.1016/S0960-8524(02)00222-5
  • [4] Kinetics of chromium removal from spent tanning liquors using acetylene production sludge
    Beleza, VM
    Boaventura, RA
    Almeida, MF
    [J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2001, 35 (21) : 4379 - 4383
  • [5] Removal of hexavalent chromium from wastewater using a new composite chitosan biosorbent
    Boddu, VM
    Abburi, K
    Talbott, JL
    Smith, ED
    [J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2003, 37 (19) : 4449 - 4456
  • [6] Interaction between aqueous chromium solutions and layer silicates
    Brigatti, MF
    Franchini, G
    Lugli, C
    Medici, L
    Poppi, L
    Turci, E
    [J]. APPLIED GEOCHEMISTRY, 2000, 15 (09) : 1307 - 1316
  • [7] A comparative study of the removal of trivalent chromium from aqueous solutions by bentonite and expanded perlite
    Chakir, A
    Bessiere, J
    Kacemi, KEL
    Marouf, B
    [J]. JOURNAL OF HAZARDOUS MATERIALS, 2002, 95 (1-2) : 29 - 46
  • [8] Crank J., 1967, MECHANISTIC DIFFUSIO
  • [9] Dantas TND, 2001, LANGMUIR, V17, P4256
  • [10] Adsorption of Cr(III) and Fe(III) on an inorganic-organic silicon hybrid surface
    de Farias, RF
    de Souza, AG
    Nunes, LM
    Cardoso, VD
    [J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2002, 211 (2-3) : 295 - 298
1234