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Beryllium chemical speciation in elemental human biological fluids
Mark Sutton1, Stephen R Burastero
1Analytical and Nuclear Chemistry Division, Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA. Sutton18@llnl.gov
Chemical Research in Toxicology
|September 16, 2003
Summary
Understanding beryllium
Area of Science:
- Environmental Chemistry
- Toxicology
- Computational Chemistry
Background:
- Beryllium toxicology is crucial for managing chronic beryllium disease.
- Traditional methods rarely explore metal toxicology using thermodynamic modeling.
- Beryllium's behavior in biological fluids remains poorly understood.
Purpose of the Study:
- To model and understand beryllium chemistry in various simulated human biological fluids.
- To investigate beryllium speciation and solubility across different physiological environments.
- To explore the implications of beryllium chemistry for toxicology and treatment.
Main Methods:
- Utilized the chemical thermodynamic speciation code MINTEQA2.
- Modeled beryllium chemistry in simulated intracellular, interstitial, and plasma fluids.
- Simulated various human biological fluids including airway surface fluids, saliva, urine, and gastrointestinal fluids.
Main Results:
- Beryllium solubility and speciation significantly varied among simulated biological fluids.
- Beryllium hydroxide and/or phosphate formation was predicted in most fluids.
- Beryllium absorption in the GI tract may be limited by beryllium phosphate precipitation.
- Beryllium solubility was predicted to be 13% lower in asthmatic airway fluid.
Conclusions:
- Thermodynamic modeling provides insights into beryllium's behavior in human biological fluids.
- Results support hypotheses regarding gastrointestinal absorption and asthma-related solubility.
- Findings can inform biological monitoring and chelation therapy strategies for beryllium exposure.