Arsenic fractionation in agricultural soil using an automated three-step sequential extraction method coupled to hydride generation-atomic fluorescence spectrometry

Rosas-Castor, J.M.; Portugal, Lindomar A.; Ferrer, Laura; Guzmán-Mar, Jorge Luis; Hernández-Ramírez, Aracely; Cerdà, Vı́ctor; Hinojosa‐Reyes, Laura

doi:10.1016/j.aca.2015.03.019

Cited by 19 publications

(3 citation statements)

References 21 publications

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“…Heavy metals in soil can be categorized into acid-soluble, reducible, oxidizable and residual fractions. The acid-soluble fraction exhibits greater mobility, while the reducible and oxidizable fractions are relatively stable but prone to transformation through redox reactions [48,49]. To address this, artificially cultured iron-sulfur-reducing microorganisms were utilized to promote the reduction of sulfate and trivalent iron, consequently reducing the reducible fraction in soil.…”

Section: Mechanism Of Bio-reductive Enhanced Phytoremediationmentioning

confidence: 99%

Enhanced Effect of Phytoextraction on Arsenic-Contaminated Soil by Microbial Reduction

Zhao,

Cao,

Chen

2023

Applied Sciences

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The gradually increasing presence of arsenic, a highly toxic heavy metal, poses a significant threat to both soil environmental safety and human health. Pteris vittata has long been recognized as an efficient hyperaccumulator plant for arsenic pollution. However, the pattern of arsenic accumulation in soil impacts its bioavailability and restricts the extraction efficiency of Pteris vittata. To address this issue, microorganisms have the potential to improve the arsenic accumulation efficiency of Pteris vittata. In this work, we employed anthropogenic enrichment methods to extract functional iron–sulfur-reducing bacteria from soil as a raw material. These bacteria were then utilized to assist Pteris vittata in the phytoremediation of arsenic-contaminated soil. Furthermore, the utilization of organic fertilizer produced from fermented crop straw significantly boosted the remediation effect. This led to an increase in the accumulation efficiency of arsenic by Pteris vittata by 87.56%, while simultaneously reducing the content of available arsenic in the soil by 98.36%. Finally, the experimental phenomena were studied through a soil-microbial batch leaching test and plant potting test. And the mechanism of the microorganism-catalyzed soil iron–sulfur geochemical cycle on arsenic release and transformation in soil as well as the extraction effect of Pteris vittata were systematically investigated using ICP, BCR sequential extraction and XPS analysis. The results demonstrated that using iron–sulfur-reducing microorganisms to enhance the phytoremediation effect is an effective strategy in the field of ecological restoration.

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Section: Mechanism Of Bio-reductive Enhanced Phytoremediationmentioning

confidence: 99%

Enhanced Effect of Phytoextraction on Arsenic-Contaminated Soil by Microbial Reduction

Zhao,

Cao,

Chen

2023

Applied Sciences

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“…Currently, over 200 naturally occurring minerals containing arsenic are known to exist [20,21]. Due to the development of mining industries, unquantifiable harmful elements, including arsenic, have transitioned from stable states to active states, entering the natural cycling system [22]. They undergo processes such as leaching, dissolution, evaporation concentration, and the cycling of the food chain, leading to iterative enrichment [23,24].…”

Section: Introductionmentioning

confidence: 99%

Spatial Distribution of Arsenic in the Aksu River Basin, Xinjiang, China: The Cumulative Frequency Curve and Geostatistical Analysis

Shao,

Wang,

et al. 2024

Sustainability

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The quality of drinking water is crucial for human health and the sustainable development of societies. The Aksu River Basin, a typical inland river system, has areas where groundwater arsenic levels exceed safe drinking water standards (i.e., arsenic concentrations greater than 10 μg/L). Identifying the causes of high arsenic levels in the basin’s groundwater requires further study. Analyzing the hydrogeochemical composition of the Aksu River basin helps us to understand the spatial distribution of groundwater environments and locate areas with dangerously high arsenic levels. In this research, we collected 196 groundwater samples from along the river. Out of these, 38 samples had arsenic levels above 10 μg/L, which represents 19.4% of the total samples collected. By examining the slope changes in the cumulative frequency curves of major ion ratios and employing geostatistics (specifically, the Kriging interpolation), and taking into account the environmental characteristics of the entire basin, we divided the study area into five sub-regions (Zone I through Zone V). The geostatistical analysis showed a significant spatial variability in groundwater arsenic levels, with a clear spatial correlation. Our findings demonstrate that arsenic concentrations in the Aksu River basin’s groundwater vary widely, with Zones II and III—mainly located in the northeastern part of the basin and in Awat County—being hotspots for high-arsenic water. Factors such as a weak reducing environment, intense evaporation, strong cation exchange, and the low-permeability recharge of surface water contribute to the accumulation of arsenic in the basin’s groundwater. The results of this study are vital for assessing the risk of arsenic contamination in groundwater in similar basins and for identifying critical areas for further investigation and research.

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“…However, over 200 known natural minerals containing arsenic exist, and the dissolution of these minerals is often considered to be the primary source of arsenic contamination in groundwater [10,11]. Anthropogenic sources, such as mining activities, smelting, combustion, agrochemicals, wood treatment, paints, cosmetics, and dyes, also release significant amounts of arsenic into the aquatic environment [12]. Elemental arsenic is enriched in the environment through leaching, enrichment, burial dissolution, compaction release, evaporation concentration, and food-chain cycling [13,14].…”

Section: Introductionmentioning

confidence: 99%

Groundwater–Surface Water Exchange and Spatial Distribution of Arsenic in Arid and Semi-Arid Regions: The Case of Aksu River in Xinjiang, Northwestern China

Shao

Wang

2023

Water

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The Aksu River, a quintessential inland river, exhibits elevated arsenic (As) concentrations in certain sections of its natural waters. Further investigation is necessary to determine the role of surface water and groundwater (SW-GW) exchanges in contributing to these high As concentrations. Both surface water and groundwater constitute crucial components of the basin water cycle, and the interaction between the two has been a central focus in basin water cycle research. In this study, a total of 59 groundwater samples and 41 surface water samples were collected along the river’s course within the basin. Among the groundwater samples, 18.64% exceeded the permissible drinking limit for As concentrations (10 μg/L), while 39.02% of the surface water samples exceeded this threshold. The water bodies in the Aksu River Basin are mildly alkaline, with total dissolved solids (TDSs) in surface water significantly surpassing those in groundwater. The chemical compositions of surface water and groundwater are strikingly similar, with the predominant anions being chloride (Cl−) and sulfate (SO42−) and the principal cations being sodium (Na+). The dissolution of silicate and carbonate minerals primarily influences the water chemistry characteristics of surface water and groundwater in the Aksu River Basin, followed by the dissolution of salt rocks. Human activities also play a major role in affecting the river’s water quality. The distribution of groundwater with elevated As content is entirely encompassed within the spatial distribution of surface water. Groundwater–surface water exchange plays a vital role in As enrichment in surface water.

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Arsenic fractionation in agricultural soil using an automated three-step sequential extraction method coupled to hydride generation-atomic fluorescence spectrometry

Cited by 19 publications

References 21 publications

Enhanced Effect of Phytoextraction on Arsenic-Contaminated Soil by Microbial Reduction

Enhanced Effect of Phytoextraction on Arsenic-Contaminated Soil by Microbial Reduction

Spatial Distribution of Arsenic in the Aksu River Basin, Xinjiang, China: The Cumulative Frequency Curve and Geostatistical Analysis

Groundwater–Surface Water Exchange and Spatial Distribution of Arsenic in Arid and Semi-Arid Regions: The Case of Aksu River in Xinjiang, Northwestern China

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