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A Fluorescence Based Measurement Technique to Quantify Water Contaminants at Pipe Surfaces During Flow
1National Institute of Standards and Technology Gaithersburg, MD 20899 USA.
International Journal of Transport Phenomena
|April 3, 2018
Summary
This study developed a fluorescence technique to measure diesel contaminant mass on surfaces during water flow. The method accurately quantifies diesel adsorption and desorption on copper surfaces, crucial for environmental monitoring.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Surface Science
Background:
- Accurate measurement of surface contaminants is vital for environmental monitoring and industrial processes.
- Existing methods for quantifying contaminants in fluid flow can be limited in sensitivity and real-time applicability.
- Understanding contaminant adsorption and desorption dynamics is key to managing pollution.
Purpose of the Study:
- To develop and validate a novel fluorescence-based measurement technique for quantifying contaminant mass on solid surfaces.
- To investigate the adsorption and desorption behavior of diesel on a copper surface under varying water flow conditions.
- To establish a correlation between fluorescence intensity and the excess surface density of diesel.
Main Methods:
- Design and development of a specialized test apparatus for contaminant studies.
- Utilizing a fluorescence measurement probe to assess diesel presence on a copper surface.
- Implementing a calibration technique to link fluorescence intensity to diesel mass per unit area (excess surface density) and bulk concentration.
- Performing probe traverses perpendicular to the test surface for comprehensive measurements.
Main Results:
- Successful development of a fluorescence-based method for measuring contaminant mass on surfaces.
- Quantification of diesel adsorption and desorption on a copper surface in both contaminated and fresh water flows.
- Established a calibration curve correlating fluorescence intensity with excess surface density (0-0.02 kg/m²) and bulk diesel concentration.
- Demonstrated the influence of bulk mass fraction and Reynolds number on measured excess surface density.
Conclusions:
- The developed fluorescence technique provides a reliable method for measuring surface contaminant mass in dynamic fluid environments.
- The study successfully characterized diesel-adsorbing behavior on copper, offering insights into contaminant transport and fate.
- This technique has potential applications in environmental monitoring, industrial process control, and pollution remediation strategies.
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