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Untargeted Liquid Chromatography-Mass Spectrometry-Based Metabolomics Analysis of Wheat Grain
Published on: March 13, 2020
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[Assessing the Lead Accumulation Risks of Wheat Grain by Developing a Source-Specific Accumulation Risk Assessment
Yang Yang1, Yan-Ling Li2, Shuo Niu3
1State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Huan Jing Ke Xue= Huanjing Kexue
|August 16, 2022
Summary
Atmospheric deposition and phosphate fertilizers are key sources of lead (Pb) in wheat grain. Improving soil cation-exchange capacity (CEC) significantly reduces Pb accumulation risk in crops.
Area of Science:
- Environmental Science
- Agricultural Science
- Soil Science
Background:
- Lead (Pb) accumulation in wheat grain poses a significant food safety risk in China.
- Understanding Pb transfer from soil to wheat is crucial for risk management.
Purpose of the Study:
- To investigate Pb accumulation in wheat grain in Jiyuan City, China.
- To identify major Pb contamination sources and influential soil factors.
- To assess the risk of Pb accumulation and evaluate control measures.
Main Methods:
- Developed a site-specific source risk assessment model (SRAM).
- Integrated positive matrix factorization, Freundlich function, and Monte Carlo simulation.
- Conducted spatial analysis to evaluate control measure effectiveness.
Main Results:
- Atmospheric deposition and phosphate fertilizers were major Pb sources (29.0%).
- Soil pH and cation-exchange capacity (CEC) significantly influenced Pb accumulation.
- High-risk areas showed a 10.5% likelihood of exceeding Pb limits.
Conclusions:
- Improving soil CEC to ≥20 cmol·kg⁻¹ reduced Pb accumulation risk to 2.39%.
- Targeted management of soil properties and contamination sources is essential for food safety.
