Magnetic niobia as adsorbent of organic contaminants in aqueous medium:: Effect of temperature and pH

被引：25

作者：

Goncalves, Maraisa ^{[1
]}

Alves Oliveira, Luiz Carlos ^{[1
]}

Guerreiro, Mario Cesar ^{[1
]}

机构：

[1] Univ Fed Lavras, Dept Quim, BR-37200000 Lavras, MG, Brazil

来源：

QUIMICA NOVA | 2008年 / 31卷 / 03期

关键词：

iron oxide; niobium oxide; adsorption process;

D O I：

10.1590/S0100-40422008000300010

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This work describes novel materials based on pure iron oxide and iron oxide/niobia composite to produce a magnetic adsorbent. These materials were prepared with synthetic iron oxide and characterized by powder XRD, SEM, FTIR, TPR and Mossbauer spectroscopy. Results showed that the main iron oxides formed were goethite (alpha FeOOH) and maghemite (gamma Fe2O3) with small particle size. The iron oxide and iron oxide/niobia composite showed high adsorption ability for organic compounds. The positive enthalpy indicated an endothermic adsorption process suggesting physical adsorption.

引用

页码：518 / 522

页数：5

共 22 条

[1] Use of some natural and waste materials for waste water treatment [J].

Ahsan, S ;

Kaneco, S ;

Ohta, K ;

Mizuno, T ;

Kani, K .

WATER RESEARCH, 2001, 35 (15) :3738-3742

[2] Kinetics and thermodynamics of adsorption of azinphosmethyl from aqueous solution onto pyrolyzed (at 600 °C) ocean peat moss (Sphagnum sp.) [J].

Aroguz, A. Z. .

JOURNAL OF HAZARDOUS MATERIALS, 2006, 135 (1-3) :100-105

[3]

Cornell R.M., 2003, IRON OXIDES

[4] Remarkable effect of Co and Mn on the activity of Fe3-xMxO4 promoted oxidation of organic contaminants in aqueous medium with H2O2 [J].

Costa, RCC ;

de Fátima, M ;

Lelis, F ;

Oliveira, LCA ;

Fabris, JD ;

Ardisson, JD ;

Rios, RRVA ;

Silva, CN ;

Lago, RM .

CATALYSIS COMMUNICATIONS, 2003, 4 (10) :525-529

[5] New trends for treatment of industrial effluents containing organochloride species [J].

Freire, RS ;

Pelegrini, R ;

Kubota, LT ;

Durán, N ;

Peralta-Zamora, P .

QUIMICA NOVA, 2000, 23 (04) :504-511

[6] Heavy metals removal from wastewater by the natural zeolite scolecite - Temperature and pH influence in single-metal solutions [J].

Jimenez, RS ;

Dal Bosco, SM ;

Carvalho, WA .

QUIMICA NOVA, 2004, 27 (05) :734-738

[7]

Juang RS, 1997, J CHEM TECHNOL BIOT, V70, P391, DOI 10.1002/(SICI)1097-4660(199712)70:4<391::AID-JCTB792>3.0.CO

[8]

2-V

[9] New tendencies on textile effluent treatment. [J].

Kunz, A ;

Peralta-Zamora, P ;

de Moraes, SG ;

Durán, N .

QUIMICA NOVA, 2002, 25 (01) :78-82

[10]

LIMA CR, 2005, QUIM NOVA, V28, P226

← 1 2 3 →