Silica coated magnetite particles for magnetic removal of Hg2+ from water

被引:310
作者
Girginova, Penka I. [1 ]
Daniel-da-Silva, Ana L. [1 ]
Lopes, Claudia B. [1 ]
Figueira, Paula [1 ]
Otero, Marta [1 ]
Amaral, Vitor S. [2 ]
Pereira, Eduarda [1 ]
Trindade, Tito [1 ]
机构
[1] Univ Aveiro, Dept Chem, CICECO, CESAM, P-3810193 Aveiro, Portugal
[2] Univ Aveiro, Dept Phys, P-3810193 Aveiro, Portugal
关键词
Mercury; Magnetite particles; Dithiocarbamate; Silica surfaces; Water purification; SOLID-PHASE EXTRACTION; IMMOBILIZED-DITHIOCARBAMATE DERIVATIVES; PLASMA-MASS SPECTROMETRY; AQUEOUS-SOLUTIONS; HEAVY-METALS; WASTE-WATER; ENVIRONMENTAL APPLICATIONS; TITANOSILICATE ETS-4; SURFACE MODIFICATION; NATURAL-WATERS;
D O I
10.1016/j.jcis.2010.01.087
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
The magnetic removal of Hg2+ from water has been assessed using silica coated magnetite particles. The magnetite particles were first prepared by hydrolysis of FeSO4 and their surfaces were modified with amorphous silica shells that were then functionalized with organic moieties containing terminal dithiocarbamate groups. Under the experimental conditions used, the materials reported here displayed high efficiency for Hg2+ uptake (74%) even at contaminant levels as low as 50 mu g l(-1). Therefore these eco-nanomagnets show great potential for the removal of heavy metal ions of polluted water, via magnetic separation. (c) 2010 Elsevier Inc. All rights reserved.
引用
收藏
页码:234 / 240
页数:7
相关论文
共 62 条
[51]   Synthesis of some ferromagnetic composite resins and their metal removal characteristics in aqueous solutions [J].
Sheha, R. R. ;
El-Zahhar, A. A. .
JOURNAL OF HAZARDOUS MATERIALS, 2008, 150 (03) :795-803
[52]   Thiol containing polymer encapsulated magnetic nanoparticles as reusable and efficiently separable adsorbent for heavy metal ions [J].
Shin, Seoyoun ;
Jang, Jyongsik .
CHEMICAL COMMUNICATIONS, 2007, (41) :4230-4232
[53]   DETERMINATION OF EXTRACTION CONSTANTS OF METAL DIETHYLDITHIOCARBAMATES [J].
STARY, J ;
KRATZER, K .
ANALYTICA CHIMICA ACTA, 1968, 40 (01) :93-&
[54]  
Tartaj P, 2001, ADV MATER, V13, P1620, DOI 10.1002/1521-4095(200111)13:21<1620::AID-ADMA1620>3.0.CO
[55]  
2-Z
[56]  
Theron J, 2008, CRIT REV MICROBIOL, V34, P43, DOI [10.1080/10408410701710442, 10.1080/10408410701710442 ]
[57]   Removal of complexed mercury from aqueous solutions using dithiocarbamate grafted on silica gel [J].
Venkatesan, KA ;
Srinivasan, TG ;
Rao, PRV .
SEPARATION SCIENCE AND TECHNOLOGY, 2002, 37 (06) :1417-1429
[58]   Cobalt-extraction studies on dithiocarbamate grafted on silica gel surface [J].
Venkatesan, KA ;
Srinivasan, TG ;
Rao, PRV .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2001, 180 (03) :277-284
[59]   Supercritical fluid extraction: metals as complexes [J].
Wai, CM ;
Wang, SF .
JOURNAL OF CHROMATOGRAPHY A, 1997, 785 (1-2) :369-383
[60]   Physical and chemical properties of magnetite and magnetite-polymer nanoparticles and their colloidal dispersions [J].
Zaitsev, VS ;
Filimonov, DS ;
Presnyakov, IA ;
Gambino, RJ ;
Chu, B .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1999, 212 (01) :49-57