Related Experiment Video
Updated: Dec 13, 2025
12:03
Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil
Published on: September 1, 2020
6.6K
Cadmium mobility in three contaminated soils amended with different additives as evaluated by dynamic flow-through
Yasir Hamid1, Lin Tang1, Bilal Hussain1
1Ministry of Education (MOE) Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Science, Zhejiang University, Hangzhou, 310058, People's Republic of China.
Chemosphere
|July 30, 2020
Summary
Lime, biochar, and composite amendments effectively reduced cadmium (Cd) leaching in contaminated soils. These soil amendments immobilized toxic metals, improving soil health and food safety.
Area of Science:
- Environmental Science
- Soil Science
- Geochemistry
Background:
- Arable land acts as a significant sink for cadmium (Cd), making soils a primary source of metal contamination in the food chain.
- Understanding metal mobility in contaminated soils is crucial for developing effective remediation strategies to protect food safety.
Purpose of the Study:
- To evaluate the immobilization of cadmium (Cd) in contaminated stagnic anthrosol, gleysol, and fluvisol under continuous flow conditions.
- To identify effective soil amendments for reducing Cd mobility and leaching in diverse soil types.
Main Methods:
- Ten treatments, including control, lime (T2), biochar (T5), and a composite amendment (T10), were tested on soils with natural and spiked Cd concentrations (0.58-2 mg kg⁻¹).
- Continuous flow experiments were conducted to measure Cd concentration in soil leachates.
- Characterization of amendments and analysis of Cd speciation in soils were performed.
Main Results:
- Lime (T2), biochar (T5), and the composite amendment (T10) significantly reduced Cd concentrations in soil leachates across all tested soil types and Cd levels.
- Amendments showed structural transformations and involved functional groups (e.g., C-O, CO, O-H) in Cd adsorption and precipitation.
- Cd speciation shifted towards more stable fractions in soils treated with T2, T5, and T10.
Conclusions:
- Lime, biochar, and composite amendments are highly effective in immobilizing cadmium and reducing its leaching in contaminated stagnic anthrosol, gleysol, and fluvisol.
- These findings provide valuable insights for managing Cd contamination and mitigating risks in diverse agricultural soils.
