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Charles Timchalk

Researcher at Pacific Northwest National Laboratory

Publications -  95
Citations -  4483

Charles Timchalk is an academic researcher from Pacific Northwest National Laboratory. The author has contributed to research in topics: TCPy & Environmental exposure. The author has an hindex of 34, co-authored 95 publications receiving 4105 citations. Previous affiliations of Charles Timchalk include Environmental Molecular Sciences Laboratory & Battelle Memorial Institute.

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Removal of Heavy Metals from Aqueous Systems with Thiol Functionalized Superparamagnetic Nanoparticles

TL;DR: Superparamagnetic iron oxide (Fe3O4) nanoparticles with a surface functionalization of dimercaptosuccinic acid (DMSA) are an effective sorbent material for toxic soft metals such as Hg, Ag, Pb, Cd, and Tl, which effectively bind to the DMSA ligands and for As, which binds to the iron oxide lattices.
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Selective Capture of Cesium and Thallium from Natural Waters and Simulated Wastes with Copper Ferrocyanide Functionalized Mesoporous Silica

TL;DR: FC-Cu-EDA-SAMMS has great potential to be used as orally administered drug for limiting the absorption of radioactive Cs and toxic Tl in gastrointestinal tract and was less affected by the solution pH, competing cations, and matrices.
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Quantum Dot-Based Immunochromatographic Fluorescent Biosensor for Biomonitoring Trichloropyridinol, a Biomarker of Exposure to Chlorpyrifos

TL;DR: Results demonstrate that this sensor provides a rapid, clinically accurate, and quantitative tool for TCP detection and shows great promise for in-field and point-of-care (POC) quantitative testing and screening for metabolite biomarkers, e.g., TCP, for humans exposed to pesticides.
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Electrochemical Sensors for the Detection of Lead and Other Toxic Heavy Metals: The Next Generation of Personal Exposure Biomonitors

TL;DR: Two classes of metal analyzers for the voltammetric detection of Pb are highlighted, including: a) an analyzer based on flow injection analysis and anodic stripping voltammetry at a mercury-film electrode, and b) Hg-free metal analyzer employing adsorptive stripping voltAmmetry and novel nanostructure materials that include the self-assembled monolayers on mesoporous supports and carbon nanotubes.