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Related Experiment Video

Updated: Jun 13, 2026

TD-DFT Guided Advanced E-Eye Sensing Technique for On-site Quantification of Fe, Cr, F, and As in the Environmental, Biological, and Food Samples
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Regulatory patterns and driving factors of soil aggregates on the environmental behavior of heavy metals: A global

Yu-Xuan Song1,2, Yuhan Meng1, Bingxuan Zhao3

  • 1College of Agriculture, Yanbian University, Yanji, 133002, China.

Environmental Geochemistry and Health
|June 12, 2026
PubMed
Summary
This summary is machine-generated.

Soil aggregates significantly influence heavy metal (HM) fate. Microaggregates stabilize HMs, while macroaggregates enhance HM availability and remediation effectiveness, driven by soil properties and aggregate structure.

Keywords:
Environmental behaviorHeavy metalMachine learningMeta-analysisSoil aggregates

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Integrated Field Lysimetry and Porewater Sampling for Evaluation of Chemical Mobility in Soils and Established Vegetation

Published on: July 4, 2014

Area of Science:

  • Environmental Science
  • Soil Science
  • Geochemistry

Background:

  • Soil heavy metal (HM) pollution is a critical global environmental issue.
  • Understanding the mechanisms of HM adsorption, distribution, and remediation is essential for effective soil management.
  • The role of soil aggregates in governing HM fate requires further clarification.

Purpose of the Study:

  • To elucidate the dominant role of soil aggregates in controlling HM adsorption, distribution, and remediation.
  • To investigate the aggregate-driven pathways of HM adsorption-desorption-migration-transformation.
  • To identify key factors influencing HM bioavailability and mobility within different soil aggregate fractions.

Main Methods:

  • Comparative analysis of HM adsorption and desorption in microaggregates and macroaggregates.
  • Assessment of HM stabilization mechanisms and bioavailability within different aggregate fractions.
  • Application of machine learning models (Random Forest, XGBoost, LightGBM) to identify key controlling factors.

Main Results:

  • Microaggregates showed higher HM adsorption (EP 21.63%) and stabilization through specific adsorption and complexation, leading to lower availability.
  • Macroaggregates, despite lower total HM content, exhibited higher HM availability due to their porous structure and fixation modes.
  • Macroaggregates demonstrated superior remediation effectiveness for HMs (EP 12.63% for total, 12.54% for available HMs).
  • Machine learning identified HM type, soil organic matter, and pH as key drivers of HM adsorption and distribution, mediated by aggregate stability.

Conclusions:

  • Soil aggregates play a pivotal role in regulating HM fate, with distinct mechanisms in micro- and macroaggregates.
  • Macroaggregates are more effective for HM remediation due to higher HM availability.
  • Soil properties and aggregate stability are crucial for predicting and managing HM pollution and guiding soil restoration efforts.