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Related Experiment Video

Updated: Jun 27, 2026

Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon

Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon

Published on: October 16, 2018

Multiscale risks-bioaccessibility coupling framework for improving derivation of soil cadmium threshold.

Shiyan Yang¹, Qianhang Zhou², Lijuan Sun³

¹Eco-Environmental Protection Institution, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; Key Laboratory of Low-carbon Green Agriculture in Southeastern China, Ministry of Agriculture and Rural Affairs, Shanghai 201403, China; School of Environment & Nature Resources, Zhejiang University of Science and Technology, Key Laboratory of Recycling and Eco-Treatment of Waste Biomass of Zhejiang Province, Hangzhou 310023, China.

Environment International

|January 7, 2026

Summary

Establishing a new framework for cadmium (Cd) soil thresholds improves rice safety and human health protection. This approach considers bioaccessibility and multiscale risks, leading to more accurate environmental management.

Keywords:

Bioaccessibility Cadmium Multiscale risks Rice bioaccumulation Soil safety threshold

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Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil

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Published on: September 1, 2020

Area of Science:

Environmental Science
Soil Science
Toxicology

Background:

Traditional soil cadmium (Cd) threshold derivation relies on total Cd and single risks, neglecting bioaccessibility, multiscale risks, and spatial heterogeneity.
This approach can lead to over- or under-protection of rice production and human health.
Precise soil Cd thresholds are crucial for safe rice cultivation and public health.

Purpose of the Study:

To develop and validate a new multiscale risks-bioaccessibility coupling (MRBC) framework for deriving regional-specific soil Cd thresholds.
To improve the synergistic protection of safe rice production and human health.
To refine soil environmental quality management through more scientific threshold derivation.

Main Methods:

Systematic field sampling of paired soil-rice grains in a major Chinese megacity.
Development and application of the MRBC framework integrating soil properties, multiple risk objectives, and Cd bioaccessibility.
Analysis of soil factors (pH, EC, SOM) influencing Cd bioaccumulation and threshold derivation.

Main Results:

Soil pH, EC, and SOM concentration were identified as key factors affecting rice Cd accumulation and soil Cd thresholds.
Soil Cd thresholds decreased when considering HNO3 and CaCl2-extractable Cd.
Integrating gastrointestinal bioaccessibility significantly increased soil Cd thresholds due to health risk considerations.

Conclusions:

The MRBC framework provides a more reliable and accurate method for deriving regional-specific soil Cd thresholds.
Current soil Cd environmental criteria in China may be overly conservative, potentially over-protecting regional rice production and human health.
The study enhances soil threshold derivation techniques, enabling more precise and scientific soil environmental quality management.