Use of statistical design of experiments to evaluate the sorption capacity of 1,4-diazoniabicycle[2.2.2]octane/silica chloride for Cr(VI) adsorption

被引：74

作者：

Arenas, Leliz T. ^{[1
]}

Lima, Eder C. ^{[1
]}

dos Santos, Araci A., Jr. ^{[1
]}

Vaghetti, Julio C. P. ^{[1
]}

Costa, Tania M. H. ^{[1
]}

Benvenutti, Edilson V. ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, Inst Quim, BR-91501970 Porto Alegre, RS, Brazil

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2007年 / 297卷 / 1-3期

关键词：

Cr(VI) adsorption; modified silica gel; isotherm models; statistical design of experiments;

D O I：

10.1016/j.colsurfa.2006.10.050

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

1,4-Diazabicycle [2.2.2] octane (dabco) silica prepared by grafting (GR-dabco) and sol-gel (SG-dabco) methods were used for removal of Cr(VI) species from aqueous solutions. Full 2(3) factorial designs with two pseudo-central points were carried out in order to achieve the best conditions of batch adsorption procedure for the Cr(VI) anion uptake by the adsorbents. In order to continue the optimizations, central composite surface design was also employed. These two independent statistical designs of experiments leaded to the following conditions: m = 30.0 mg of adsorbent; pH 6.0; t of contact of 180 min to guarantee the equilibration at higher adsorbate concentration. After achieving the best conditions for Cr(VI) adsorption, isotherms of this adsorbate on using the chosen adsorbents were obtained, which were fitted to non-linear Langmuir, Freundlich, and Sips isotherm models. The maximum sorption capacity for Cr(VI) anion adsorption was 63.86 and 79.82 mg g(-1) for using GR-dabco and SG-dabco, respectively. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：240 / 248

页数：9

共 36 条

[1] The use of organofuntionalized silica gel as sequestrating agent for metals [J].

Airoldi, C ;

de Farias, RF .

QUIMICA NOVA, 2000, 23 (04) :496-503

[2] Cr(VI) removal from aqueous solution by iron (III) hydroxide-loaded sugar beet pulp [J].

Altundogan, HS .

PROCESS BIOCHEMISTRY, 2005, 40 (3-4) :1443-1452

[3] Structure and property studies of hybrid xerogels containing bridged positively charged 1,4-diazoniabi cycle [2.2.2]octane dichloride [J].

Arenas, LT ;

Dias, SLP ;

Moro, CC ;

Costa, TMH ;

Benvenutti, EV ;

Lucho, AMS ;

Gushikem, Y .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2006, 297 (01) :244-250

[4] Dabco/silica sol-gel hybrid material.: The influence of the morphology on the CdCl2 adsorption capacity [J].

Arenas, LT ;

Vaghetti, JCP ;

Moro, CC ;

Lima, EC ;

Benvenutti, EV ;

Costa, TMH .

MATERIALS LETTERS, 2004, 58 (06) :895-898

[5]

Arens E, 2006, J THERM BIOL, V31, P53, DOI 10.1016/j.jtherbio.2005.11.028

[6] Cr(VI) biosorption from aqueous solutions using free and immobilized biomass of Lentinus sajor-caju:: preparation and kinetic characterization [J].

Arica, MY ;

Bayramoglu, G .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2005, 253 (1-3) :203-211

[7] Cr(VI) removal from synthetic wastewater using coconut shell charcoal and commercial activated carbon modified with oxidizing agents and/or chitosan [J].

Babel, S ;

Kurniawan, TA .

CHEMOSPHERE, 2004, 54 (07) :951-967

[8] THE DETERMINATION OF PORE VOLUME AND AREA DISTRIBUTIONS IN POROUS SUBSTANCES .1. COMPUTATIONS FROM NITROGEN ISOTHERMS [J].

BARRETT, EP ;

JOYNER, LG ;

HALENDA, PP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1951, 73 (01) :373-380

[9] 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

[10]

Box G.E., 1978, STAT EXPT

← 1 2 3 4 →