Chromium(VI) sorptive removal from aqueous solutions by nanocrystalline akaganeite

被引：124

作者：

Lazaridis, NK ^{[1
]}

Bakoyannakis, DN ^{[1
]}

Deliyanni, EA ^{[1
]}

机构：

[1] Aristotle Univ Thessaloniki, Sch Chem, Div Chem Technol, GR-54124 Thessaloniki, Greece

来源：

CHEMOSPHERE | 2005年 / 58卷 / 01期

关键词：

akaganeite; chromium(VI); flotation; isotherms; kinetics; sorption;

D O I：

10.1016/j.chemosphere.2004.09.007

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, akaganeite (beta-FeO(OH)) an ironoxyhydroxide material, was used as a low-cost potential adsorbent for the removal of hexavalent chromium from aqueous solutions. The influence of agitation speed, solution pH. initial chromium concentration, sorbent concentration and temperature were evaluated at batch kinetic runs. It was shown that the solid diffusion model, in comparison to simple reaction kinetic models, described better the sorption kinetics. Freundlich and Frumkin isotherm best fitted the equilibrium results. Akaganeite presented a sorption capacity approximately 80mg Cr(VI) g(-1), under the conditions studied. Flotation was used as a downstream process for the effective removal of the loaded material. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：65 / 73

页数：9

共 30 条

[1]

[Anonymous], 1995, STANDARD METHODS EXA

[2] Akaganeite and goethite-type nanocrystals: synthesis and characterization [J].

Bakoyannakis, DN ;

Deliyanni, EA ;

Zouboulis, AI ;

Matis, KA ;

Nalbandian, L ;

Kehagias, T .

MICROPOROUS AND MESOPOROUS MATERIALS, 2003, 59 (01) :35-42

[3] Removal of hexavalent chromium from wastewater using a new composite chitosan biosorbent [J].

Boddu, VM ;

Abburi, K ;

Talbott, JL ;

Smith, ED .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2003, 37 (19) :4449-4456

[4] Film-pore diffusion modeling for the sorption of metal ions from aqueous effluents onto peat [J].

Chen, B ;

Hui, CW ;

McKay, G .

WATER RESEARCH, 2001, 35 (14) :3345-3356

[5] Combined diffusion model for the sorption of cadmium, copper, and zinc ions onto bone char [J].

Cheung, CW ;

Chan, CK ;

Porter, JF ;

McKay, G .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2001, 35 (07) :1511-1522

[6]

CRANK J, 1967, MATH DIFFUSION, P88

[7] Sorption of As(V) ions by akaganeite-type nanocrystals [J].

Deliyanni, EA ;

Bakoyannakis, DN ;

Zouboulis, AI ;

Matis, KA .

CHEMOSPHERE, 2003, 50 (01) :155-163

[8] Accumulation and remobilization of aqueous chromium(VI) at iron oxide surfaces: Application of a thin-film continuous flow-through reactor [J].

Deng, YW ;

Stjernstrom, M ;

Banwart, S .

JOURNAL OF CONTAMINANT HYDROLOGY, 1996, 21 (1-4) :141-151

[9]

*EPA RED, 1993, EPA738F93009 RED

[10] Modified poly(4-vinylpyridine) coated silica gel. Fast kinetics of diffusion-controlled sorption of Chromium(VI) [J].

Gang, DC ;

Hu, WQ ;

Banerji, SK ;

Clevenger, TE .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2001, 40 (04) :1200-1204

← 1 2 3 →