Arsenic speciation in contaminated soils

Garcia-Manyes, Sergi; Jiménez, Gerardo; Padró, A.; Rubio, R.; Rauret, G.

doi:10.1016/s0039-9140(02)00259-x

Cited by 123 publications

(54 citation statements)

References 27 publications

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“…To the fifth was added 1 ml each solution to produce a soil containing 80 mg kg À1 arsenic in total. The soils were dried at 70 C for one week (Garcia-Manyes et al reported 26 that soils heated at 100 C did not lose arsenic). The dried soils were kept at room temperature in sealed 100 ml polypropylene containers in the dark until needed.…”

mentioning

confidence: 99%

Determination of four arsenic species in soil by sequential extraction and high performance liquid chromatography with post-column hydride generation and inductively coupled plasma optical emission spectrometry detection

Al-Assaf

Tyson

Uden

2009

J. Anal. At. Spectrom.

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Several procedures, involving various solvents and ultrasound, were evaluated for the extraction of four arsenic species, arsenite (As(III)), arsenate (As(V)), monomethylarsonate (MMA) and dimethylarsinate (DMA), from a silt loam soil to which species had been added at a concentration of 20 mg kg À1 . The best extraction was by a two-stage procedure: shaking for 24 h in the presence of 0.1 mol l À1 phosphoric acid followed by shaking for 24 h in 1.0 mol l À1 sodium hydroxide solution. The arsenic species in the extracts were separated by high performance ion-exchange liquid chromatography, derivatized to hydrides by reaction with tetrahydroborate(III) in a multi-mode sample introduction system (MSIS) and quantified by ICP-OES. Detection limits in solution ranged from 0.4 (As(III) and DMA) to 1 (MMA and As(V)) mgl À1, corresponding to 10 and 25 mgkg À1 in a 0.2 g soil sample and 5 ml of extractant. The most significant change over time was that As(III) was converted to As(V). When each species was added individually, arsenic was 100% recovered over a period of several months. When all four species were added together, the recovery was 89%. As the precipitation of humic acids was slow, the sodium hydroxide extract could be acidified and analyzed without loss of analyte species.

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confidence: 99%

Determination of four arsenic species in soil by sequential extraction and high performance liquid chromatography with post-column hydride generation and inductively coupled plasma optical emission spectrometry detection

Al-Assaf

Tyson

Uden

2009

J. Anal. At. Spectrom.

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“…The extraction procedure is important for determining the speciation of As in soils, as the extraction efficiencies vary considerably in various soil types (Garcia-Manyes et al 2002) depending on the binding characteristics of As with the different soil minerals. Since bioavailability and speciation of As are critical factors for the assessment of human health risks, there is a need to develop a reliable standard extraction method for the speciation of As in plant tissue used as human food.…”

Section: Extraction Of As Species From Soils and Plantsmentioning

confidence: 99%

Arsenic in the environment—risks and management strategies

Naidu

Bhattacharya

2009

Environ Geochem Health

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“…A variety of methods have been applied for the extraction of arsenic from solid matrices including: solvent extraction (methanol, water and chloroform or mixtures of these solvents in different ratios) (Caruso et al, 2001;Chappell et al, 1995;Gomez-Ariza et. al., 2000;Helgesen and Larsen, 1998;McDougall, 1991;Quevauvillier, 1998); acid extraction with HCl (Balasoiu et al, 2001;Chappell et al, 1995;Schoof et al, 1998Schoof et al, , 1999; trifluoroacetic acid digestion ; phosphoric acid (Garcia-Manyes et al, 2002;Thomas et al, 1997) and basic digestion with NaOH (Mohri et al, 1990). After the leaching step of arsenic from a solid matrix, the most common detection methods for arsenic speciation are flow injection hydride generation atomic absorption spectrometry (FI -HG -AAS) (Gonzales et al, 2003;Munoz et al, 1999;Stylbo et al, 1999), flow injection hydride generation inductively coupled plasma atomic emission spectrometry (FI -HG -ICP -AES) (Balasoiu et al, 2001;Huang et al, 1988), hydride generation inductively coupled plasma mass spectrometry (HG -ICP -MS) (Anderson and Pergantis, 2003) hydride generation atomic fluorescence spectrometry (HG -AFS) (Benramdane et al, 1999;Shi et al, 2003) and purge and trap chromatography with atomic fluorescence detection (Slejkovec et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Distribution study of inorganic arsenic (III) and (V) species in soil and their mobility in the area of Baia-Mare, Romania

Cordos

Frențiu

Ponta

et al. 2006

Chemical Speciation & Bioavailability

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Baia-Mare industrial site in NW Romania was investigated to assess the distribution, speciation and mobility of inorganic arsenic species in soil. Contents and fractions of As(III), As(V) and total As leachable in water, 1 M HCl and 10 M HCl were determined in soil by single extraction. Total arsenic content in the selected sample, determined after a matrix modification with Mg(NO 3 ) 2 was in the range 10 -1725 mg g À 1 . The contents (mg g À 1 ) of leachable As 3 þ (As 5 þ ) species by single extraction were: 0.1 -70 (0.8 -950) in water, 0.2 -90 (1.6 -1200) in 1 M HCl and 0.8 -100 (8 -1500) in 10 M HCl, showing that arsenic (V) species represented more than 90% of the total. Leaching tests indicated a high availability of arsenic in water, although poorly reactive phases were encountered as well. Compared to the total arsenic in soil, fractions of 9 -34% were leachable in water, 39 -80% in 1 M HCl and 77 -94% in 10 M HCl. Contamination was higher at the surface than at depth and decreased with the distance from the pollutant source. Centres for pyrometallurgical processing of ores are mainly responsible for pollution with water soluble species, while centres for ores concentration for pollution with poorly reactive arsenic species soluble in 10 M HCl and Mg(NO 3 ) 2 . According to the sequential extraction data, soils in the area could be divided into three categories according to its maximum mobility in water, 1 M HCl and 10 M HCl. Good precision (RSD 7.5 -17.6%) and recovery degree (101 AE 3%) were achieved for arsenic determination in five certified soils (n ¼ 5).

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Arsenic speciation in contaminated soils

Cited by 123 publications

References 27 publications

Determination of four arsenic species in soil by sequential extraction and high performance liquid chromatography with post-column hydride generation and inductively coupled plasma optical emission spectrometry detection

Determination of four arsenic species in soil by sequential extraction and high performance liquid chromatography with post-column hydride generation and inductively coupled plasma optical emission spectrometry detection

Arsenic in the environment—risks and management strategies

Distribution study of inorganic arsenic (III) and (V) species in soil and their mobility in the area of Baia-Mare, Romania

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