High-resolution two-dimensional mapping of arsenic concentration in soil-water micro-interfaces with diffusive gradients in thin films
Year: 2024
Type: article
Abstract: 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-TiO 2 ) 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/cm 2 ) and As(III) (55.2 μg/cm 2 ) 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.
Authors: Xitong Li, Jiahui Zuo, Chuangchuang Zhang, Tieliang Zhang, Zeying He, Qiwen Zhou, Yujie Zhao, Wenjng Liu
Language: English
Subfield: Environmental Chemistry
Field: Environmental Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $700
Awards: G498893143, G5869630882, G7437904720
OpenAlex ID: W4405861885