High-resolution two-dimensional mapping of arsenic concentration in soil-water micro-interfaces with diffusive gradients in thin films
Arsenic (As) contamination in soils poses significant environmental and health risks, particularly in Asia. We present a new diffusive Gradients in thin-film (DGT) binding material (Bio-TiO2) using microbial-assisted in situ precipitation, to determine the spatial distribution of As at submillimeter...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2025-01-01
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| Series: | Environmental Chemistry and Ecotoxicology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590182624000663 |
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| Summary: | Arsenic (As) contamination in soils poses significant environmental and health risks, particularly in Asia. We present a new diffusive Gradients in thin-film (DGT) binding material (Bio-TiO2) using microbial-assisted in situ precipitation, to determine the spatial distribution of As at submillimeter resolution. The Bio-TiO₂ gel exhibited superior homogeneity, smaller particle sizes, and higher adsorption capacity for As(V) (133.6 μg/cm2) and As(III) (55.2 μg/cm2) compared to most reported As binding gels. The DGT measurements provided high-resolution, two-dimensional mapping on As distribution in soil-water micro-interfaces process during soil flooding and drainage conditions, elucidating As dynamics with a sub-millimeter resolution (∼0.1 mm per pixel). This work presents an innovative and efficient method for As monitoring, providing significant implications for assessing As bioavailability and environmental risk. |
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| ISSN: | 2590-1826 |