The distribution, solid-phase speciation, and desorption/dissolution of As in waste iron-based drinking water treatment residuals

被引:21
作者
Impellitteri, Christopher A. [1 ]
Scheckel, Kirk G. [1 ]
机构
[1] US EPA, Off Res & Dev, Natl Risk Management Res Lab, Cincinnati, OH 45268 USA
关键词
arsenic; speciation; X-ray absorption spectroscopy; waste; water treatment residuals; iron oxide;
D O I
10.1016/j.chemosphere.2006.02.001
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Arsenic concentrations and solid-phase speciation were assessed as a function of depth through Fe-media beds for two commercially available products (Granular Ferric Hydroxideo-GFH and Bayoxide E33((R))-E33) from pilot-scale water treatment field tests. These results were compared with data from solution (de-ionized water-DI-H2O) concentrations of As equilibrated with Fe-media in an anoxic environment at 4 degrees C. The materials had a high capacity for As (GFH media 9620 mg kg(-1) As, E33 Media 5246 mg kg(-1)). Arsenic concentrations decreased with bed depth. For E33, X-ray absorption near-edge spectroscopy results showed that As(V) was the dominant solid-phase species. For GFH, As(III) was detected and the proportion (relative to As(V)) of As(III) increased with bed depth. Arsenic concentrations in DI-H2O equilibrated with the media were low (<= 35 mu g l(-1)) over a period of 50 d. Arsenic concentrations in the equilibrated solutions also decreased with depth. Results from tests on soluble As speciation show that As in solution is in the form of As(V). Kinetic desorption experiments carried out at different pH values (3, 5, 7, 8, and 9) show that the media exhibit some acid/base neutralization capacity and tend to bind As sufficiently. Concentrations of As in the pH desorption experiments were in the same order of magnitude as the toxicity characteristic leaching procedure extractions (tens of mu g l(-1)) except at low pH values. For the GFH media tested at a pH of three, As increases in solution and is mainly associated with colloidal (operationally defined as between 0.1 and 1.0 mu m) iron. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:875 / 880
页数:6
相关论文
共 18 条
[1]   Microbial mobilization of arsenic from sediments of the Aberjona Watershed [J].
Ahmann, D ;
Krumholz, LR ;
Hemond, HF ;
Lovley, DR ;
Morel, FMM .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1997, 31 (10) :2923-2930
[2]  
COOPER PA, 1991, FOREST PROD J, V41, P30
[3]   OXIDATION OF ARSENATE(III) WITH MANGANESE OXIDES IN WATER-TREATMENT [J].
DRIEHAUS, W ;
SEITH, R ;
JEKEL, M .
WATER RESEARCH, 1995, 29 (01) :297-305
[4]   ARSENITE SORPTION AND DESORPTION IN SOILS [J].
ELKHATIB, EA ;
BENNETT, OL ;
WRIGHT, RJ .
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1984, 48 (05) :1025-1030
[5]   TCLP underestimates leaching of arsenic from solid residuals under landfill conditions [J].
Ghosh, A ;
Mukiibi, M ;
Ela, W .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2004, 38 (17) :4677-4682
[6]   Toxicity characteristic leaching procedure fails to extract oxoanion-forming elements that are extracted by municipal solid waste leachates [J].
Hooper, K ;
Iskander, M ;
Sivia, G ;
Hussein, F ;
Hsu, J ;
Deguzman, M ;
Odion, Z ;
Ilejay, Z ;
Sy, F ;
Petreas, M ;
Simmons, B .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1998, 32 (23) :3825-3830
[7]   Effects of pH and competing anions on the speciation of arsenic in fixed ionic strength solutions by solid phase extraction cartridges [J].
Impellitteri, CA .
WATER RESEARCH, 2004, 38 (05) :1207-1214
[8]   Arsenite and arsenate adsorption on ferrihydrite:: Surface charge reduction and net OH- release stoichiometry [J].
Jain, A ;
Raven, KP ;
Loeppert, RH .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1999, 33 (08) :1179-1184
[9]   Arsenic leachability in water treatment adsorbents [J].
Jing, CY ;
Liu, SQ ;
Patel, M ;
Meng, XG .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2005, 39 (14) :5481-5487
[10]   Surface structures and stability of arsenic(III) on goethite: Spectroscopic evidence for inner-sphere complexes [J].
Manning, BA ;
Fendorf, SE ;
Goldberg, S .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1998, 32 (16) :2383-2388