Evaluation of various chemical extraction methods to estimate plant-available arsenic in mine soils

Anawar, Hossain M.; García-Sánchez, Antonio-Javier; Santa‐Regina, Ignacio

doi:10.1016/j.chemosphere.2007.08.058

Cited by 87 publications

(47 citation statements)

References 24 publications

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“…After 4 h agitation, the mix was centrifuged (1.7 × 1000 G) and filtered. The extract was acidified to pH < 2 [45]. The determinations were carried out by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES).…”

Section: Determinationsmentioning

confidence: 99%

The Arbuscular Mycorrhiza Rhizophagus intraradices Reduces the Negative Effects of Arsenic on Soybean Plants

Spagnoletti

Lavado

2015

Agronomy

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Arsenic (As) in soils causes several detrimental effects, including death. Arsenic toxicity in soybean plants (Glycine max L.) has been little studied. Arbuscular mycorrhiza (AM) increase the tolerance of host plants to abiotic stress, like As. We investigated the effects of AM fungi on soybean grown in As-contaminated soils. A pot experiment was carried out in a glasshouse, at random with five replications. We applied three levels of As (0, 25, and 50 mg As kg −1 ), inoculated and non-inoculated with the AM fungus Rhizophagus intraradices (N.C. Schenck & G.S. Sm.) C. Walker & A. Schüßler. Plant parameters and mycorrhizal colonization were measured. Arsenic in the substrate, roots, and leaves was quantified. Arsenic negatively affected the AM percentage of spore germination and hyphal length. As also affected soybean plants negatively: an extreme treatment caused a reduction of more than 77.47% in aerial biomass, 68.19% in plant height, 78.35% in number of leaves, and 44.96% reduction in root length, and delayed the phenological evolution. Mycorrhizal inoculation improved all of these parameters, and decreased plant As accumulation (from 7.8 mg As kg ). AM inoculation showed potential to reduce As toxicity in contaminated areas. The AM fungi decreased As concentration in plants following different ways: dilution effect, less As intake by roots, and improving soybean tolerance to As.

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Section: Determinationsmentioning

confidence: 99%

The Arbuscular Mycorrhiza Rhizophagus intraradices Reduces the Negative Effects of Arsenic on Soybean Plants

Spagnoletti

Lavado

2015

Agronomy

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“…2b). Based on the relative abundance of the fraction d 3 it was 253 used all other experiments. Another argument for decreased As dissolution with decreasing 254 particle size in air-homogenised experiments is the fact that the more reactive fractions might 255 have readily oxidized from As -I /As 0 which precipitate on the surface of the material and 256 inhibit As -I /As 0 solubilization.…”

Section: Arsenic Release Experiments 151mentioning

confidence: 99%

“…After equilibration, 1.0 ml of the supernatant solution was retrieved at 158 the top of each tube for As analysis. To compare the leaching capacity of the tested waters 159 some experiments were conducted with 0.1 M EDTA, H 2 SO 4, and Na 2 CO 3 . 160…”

Section: Arsenic Release Experiments 151mentioning

confidence: 99%

“…The presence of arsenic (As) in many minerals, mining wastes, industrial wastewater and 29 waterways is a serious pollution problem [1][2][3][4]. The treatment of such contaminated materials 30 by conventional techniques is often expensive.…”

Section: Introduction 28mentioning

confidence: 99%

“…Alternatively excess As V might remain in a 95 meta-stable solution yielding higher As concentrations. Therefore, the effects of HCO 3 -on 96…”

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Arsenic Release from a Natural Rock under Near‐natural Oxidizing Conditions

Noubactep

Chen-Braucher

Schlothauer

2008

Engineering in Life Sciences

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11The solubilization of arsenic (As) from an ore material (native Arsenic [As, trig.] with 12Lollingite [FeAs 2 , rh.]) was characterized in leaching tests lasting for ≤ 99 days. The 13 experiments were performed with materials of different particle sizes (≤ 2 mm), in different 14 waters and under test conditions relevant to As mobilization at near surface contaminated 15 sites. The impact of dolomite [CaMg(CO 3 ) 2 ], metallic iron (Fe 0 ), and pyrite (FeS 2 ) on As 16 release was accessed. Two different types of batch experiments were conducted with a 17 constant amount of the base material and different types of water (deionised, mineral, spring, 18 and tap water). For comparison parallel experiments were conducted with 0.1M EDTA, 0.1M 19 Na 2 CO 3 and 0.1M H 2 SO 4 . The results indicated no significant effect of carbonate addition on 20As solubilization. Fe 0 and FeS 2 addition essentially slowed the initial As solubilization. 21 H 2 SO 4 was the sole leaching agent significantly influencing As solubilization from the base 22 material. The general trend assuming that "the smaller the particle size the quicker the As 23 release" was not strictly verified because in samples of smaller particle sizes (d < 0.063) As 24 was partly oxidized to more stable species. 25Key Words: Carbonate, Native arsenic, Solubilization 26 27 2 Introduction 28The presence of arsenic (As) in many minerals, mining wastes, industrial wastewater and 29 waterways is a serious pollution problem [1][2][3][4]. The treatment of such contaminated materials 30 by conventional techniques is often expensive. A recent development to remediate such a 31 contamination is the implementation of permeable reactive barriers [5][6][7][8][9][10]. Most of the 32 current full-scale reactive barriers use metallic iron (Fe 0 -based alloys widely termed as 33 zerovalent iron) as treatment medium. An iron reactive barrier can be placed immediately 34 down gradient of the contaminant source (e.g. mining wastes) to prevent a plume from 35 developing. Arsenic is leached from mining wastes by infiltrating surface water or flowing 36 groundwater to the reactive barrier. Therefore, to properly design a treatment wall, it is 37 essential to characterize the leaching behaviour of natural waters for contaminant source 38 materials (natural ores, mining wastes). The bicarbonate (HCO 3 -) content of subsurface waters 39 has been controversially discussed in the literature as possible important parameter 40 controlling their As mobilization capacity as discussed below. 41In the last decades substantial efforts were made to elucidate the origin of As in contaminated 42 groundwaters [1,[11][12][13][14][15][16][17][18][19][20][21][22]. The univocal result of these efforts is that As mostly originates from 43 natural background sources. However, the individual processes leading to As release and their 44 relative importance are yet to be fully elucidated [16,[23][24][25][26][27][28]. There are three main theories 45 concerning As release into the environment ...

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Phytoremediation Potential of Jack Bean Plant for Multi‐Element Contaminated Soils From Ribeira Valley, Brazil

Silva

Andrade

Campos

2018

CLEAN Soil Air Water

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Soil contamination with metal(oid)s is of concern due to deleterious effects on ecosystems, plants, and human health. This study aims at determining the potential of jack bean, Canavalia ensiformis, to be used as phytoremediator of soils contaminated with Pb, Zn, and As from past mining activities in the Ribeira Valley, Brazil. A pot experiment is conducted using soils collected from two areas contaminated with different concentrations of Pb, As, and Zn. Only in the most contaminated soil, elemental concentrations are above the limit established for agricultural purposes by Brazilian regulatory agencies. Plant tolerance is evaluated in terms of growth, elemental accumulation, establishment of root symbiosis, and biochemical indicators of metal toxicity. Plants are able to produce high biomass without signs of oxidative stress. The content of free amino acids in leaves increases when plants grown in the soil with higher metal(oid) concentrations indicating changes in physiology. Mycorrhizal symbiosis is established; however, nodulation with native rhizobia is strongly inhibited in the most contaminated soil. Jack bean roots act as a barrier to translocation retaining most of the absorbed metals, especially for Pb. The translocation index for Zn and As is higher than for Pb. In conclusion, jack bean plant can be considered of interest for phytostabilization of multi‐element contaminated soils due to its high capacity for immobilizing potentially toxic elements in roots. Although Zn and As are more mobile and accumulate in concentration levels above phytotoxicity thresholds, C. ensiformis is a tolerant species.

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Evaluation of various chemical extraction methods to estimate plant-available arsenic in mine soils

Cited by 87 publications

References 24 publications

The Arbuscular Mycorrhiza Rhizophagus intraradices Reduces the Negative Effects of Arsenic on Soybean Plants

The Arbuscular Mycorrhiza Rhizophagus intraradices Reduces the Negative Effects of Arsenic on Soybean Plants

Arsenic Release from a Natural Rock under Near‐natural Oxidizing Conditions

Phytoremediation Potential of Jack Bean Plant for Multi‐Element Contaminated Soils From Ribeira Valley, Brazil

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