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Related Experiment Video

Updated: Dec 16, 2025

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Persistent thallium contamination in river sediments, source apportionment and environmental implications.

Nuo Li1, Yuchen Zhou1, Juan Liu2

  • 1Key Laboratory of Water Quality and Conservation in the Pearl River Delta, Ministry of Education, Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Institute of Environmental Research at Greater Bay, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China.

Ecotoxicology and Environmental Safety
|July 4, 2020
PubMed
Summary
This summary is machine-generated.

Thallium (Tl) contamination in Gaofeng River sediments is excessive due to mining. A significant amount of Tl is mobile, posing risks and requiring remediation strategies.

Keywords:
Pyrite mineSediment quality indexSource identificationThallium contamination

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Area of Science:

  • Environmental Science
  • Geochemistry
  • Toxicology

Background:

  • Thallium (Tl) contamination poses risks to sustainable development.
  • Mining activities contribute to heavy metal pollution in river systems.

Purpose of the Study:

  • Investigate thallium (Tl) and potential toxic elements (PTEs) in Gaofeng River sediments.
  • Determine the sources and mobility of Tl contamination.
  • Assess risks and propose remediation strategies.

Main Methods:

  • Sediment sampling and analysis for Tl and PTEs (Pb, As, Cr, Cu, Ni, Co, Sb, Cd, U).
  • Sequential extraction to determine Tl fractionation and mobility.
  • Lead (Pb) isotope tracing to identify contamination sources.

Main Results:

  • Sediments showed excessive thallium (Tl) levels (1.80-16.70 mg/kg).
  • A significant fraction of Tl was found in labile sediment fractions, indicating potential for mobilization.
  • Pyrite mining was identified as the primary source of Tl contamination (47-76%).

Conclusions:

  • Mining activities have led to significant thallium (Tl) contamination in Gaofeng River sediments.
  • The labile nature of Tl in sediments necessitates urgent control and remediation measures.
  • Effective strategies are crucial for managing Tl pollution and ensuring environmental safety.