Related Experiment Video
Updated: Apr 18, 2026

A Method to Preserve Wetland Roots and Rhizospheres for Elemental Imaging
Published on: February 15, 2021
Arsenic availability in rice from a mining area: is amorphous iron oxide-bound arsenic a source or sink?
Chuanping Liu1, Huan-Yun Yu1, Chengshuai Liu1
1Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou, China.
Abstract:
The effect of iron (Fe) redox cycling on the mobility and bioavailability of arsenic (As) in paddy soils has attracted increasing concerns, especially in Asia, where the paddy soil is characteristic of Fe with high abundance and activity. However, whether amorphous Fe oxide-bound As acts as a source or a sink of As in natural field conditions needs to be clarified further. In this study, 73 pairs of soil and rice were collected from paddy fields contaminated by As-containing acid mining drainage. The most significant correlations between the iron fractions and As fractions suggest that Fe redox cycling can directly affect As fractionation in soils, which can then indirectly affect As bioavailability. Significantly negative correlations between amorphous Fe oxide-bound As in soil and As in rice grain were found, indicating that amorphous Fe oxide-bound As acts a sink of As.
More Related Videos
Related Concept Videos
Acid Mine Drainage
Microbial Leaching
Microbes and Other Elemental Cycles
Microbial Bioremediation of Uranium
Precipitation and Co-precipitation
The Phosphorus Cycle

