A comparative study of As(III) and As(V) in aqueous solutions and adsorbed on iron oxy-hydroxides by Raman spectroscopy

被引：154

作者：

Mueller, Katharina ^{[1
,2
]}

Ciminelli, Virginia S. T. ^{[1
]}

Dantas, Maria Sylvia S. ^{[1
]}

Willscher, Sabine ^{[2
]}

机构：

[1] Univ Fed Minas Gerais, Dept Met & Mat Engn, BR-30030160 Belo Horizonte, MG, Brazil

[2] Tech Univ Dresden, Fac Forestry Geosci & Hydrol, Inst Waste Management & Contaminated Site Treatme, Dresden, Germany

来源：

WATER RESEARCH | 2010年 / 44卷 / 19期

关键词：

Arsenate; Arsenite; Adsorption; Coprecipitation; Iron oxy-hydroxides; Raman spectroscopy; Diffuse Reflectance Infrared Fourier; Transform Spectroscopy; X-ray Absorption; Near Edge Spectroscopy; SURFACE COMPLEXATION; ARSENIC UPTAKE; GOETHITE; ADSORPTION; MECHANISMS; EXAFS; FERRIHYDRITE; SORPTION; RETENTION; PHOSPHATE;

D O I：

10.1016/j.watres.2010.05.053

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The sorption of the arsenite (AsO33-) and the arsenate (AsO43-) ions and their conjugate acids onto iron oxides is one of main processes controlling the distribution of arsenic in the environment. The present work intends to provide a large vibrational spectroscopic database for comparison of As(III) and As(V) speciation in aqueous solutions and at the iron oxide - solution interface. With this purpose, ferrihydrite, feroxyhyte, goethite and hematite were firstly synthesized, characterized in detail and used for adsorption experiments. Raman spectra were recorded from As(III) and As(V) aqueous solutions at various pH conditions selected in order to highlight arsenic speciation. Raman Scattering and Diffuse Reflectance Infrared Fourier Transform (DRIFT) studies were carried out to examine the respective As-bonding mechanisms. The collected data were curve-fitted and discussed according to molecular symmetry concepts. X-ray Absorption Near Edge Spectroscopy (XANES) was applied to confirm the oxidation state of the sorbed species. The comprehensive spectroscopic investigation contributes to a better understanding of arsenic complexation by iron oxides. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：5660 / 5672

页数：13

共 36 条

[1] ATR-FTIR spectroscopic investigation on phosphate adsorption mechanisms at the ferrihydrite-water interface [J].

Arai, Y ;

Sparks, DL .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2001, 241 (02) :317-326

[2] SORPTION OF ARSENIC BY IRON-OXIDES AND OXYHYDROXIDES IN SOILS [J].

BOWELL, RJ .

APPLIED GEOCHEMISTRY, 1994, 9 (03) :279-286

[3] Batch and continuous precipitation of scorodite from dilute industrial solutions [J].

Caetano, Michelle L. ;

Ciminelli, Virginia S. T. ;

Rocha, Sonia D. F. ;

Spitale, Matheus C. ;

Caldeira, Claudia L. .

HYDROMETALLURGY, 2009, 95 (1-2) :44-52

[4] Role of Fe(II), phosphate, silicate, sulfate, and carbonate in arsenic uptake by coprecipitation in synthetic and natural groundwater [J].

Ciardelli, Mark C. ;

Xu, Huifang ;

Sahai, Nita .

WATER RESEARCH, 2008, 42 (03) :615-624

[5]

Cornell R.M., 1996, The Iron Oxide: Structure, Properties, Reactions, Occurance and Uses

[6]

deFaria DLA, 1997, J RAMAN SPECTROSC, V28, P873, DOI 10.1002/(SICI)1097-4555(199711)28:11<873::AID-JRS177>3.0.CO

[7]

2-B

[8] Arsenic sorption onto soils enriched in Mn and Fe minerals [J].

Deschamps, E ;

Ciminelli, VST ;

Weidlér, PG ;

Ramos, AY .

CLAYS AND CLAY MINERALS, 2003, 51 (02) :197-204

[9] Characterization of the iron arsenate-sulphate compounds precipitated at elevated temperatures [J].

Dutrizac, J. E. ;

Jambor, J. L. .

HYDROMETALLURGY, 2007, 86 (3-4) :147-163

[10] Mechanisms of arsenic uptake from aqueous solution by interaction with goethite, lepidocrocite, mackinawite, and pyrite: An X-ray absorption spectroscopy study [J].

Farquhar, ML ;

Charnock, JM ;

Livens, FR ;

Vaughan, DJ .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2002, 36 (08) :1757-1762

← 1 2 3 4 →