Open AccessAn expanded porphyrin approach toward transactinium chelation and the development of porphyrin-coated optical fibers as potential actinide sensors
Author(s) -
Gregory L. Klunder,
R. Silva
Publication year - 1994
Language(s) - English
Resource type - Reports
DOI - 10.2172/86912
Subject(s) - characterization (materials science) , optical fiber , actinide , porphyrin , contamination , process engineering , fiber optic sensor , environmental science , spectroscopy , wafer , materials science , absorption (acoustics) , nanotechnology , chemistry , computer science , engineering , nuclear chemistry , telecommunications , ecology , physics , photochemistry , quantum mechanics , biology , composite material
Characterization of the contamination at DOE waste sites and facilities is necessary during environmental restoration. Characterization of toxic waste in containers and storage tanks is needed for effective waste management. Therefore, analytical and monitoring systems are needed for real-time analysis and feedback. The development of in-situ methods to measure chemical properties by specialized instrumentation capable of real-time analysis, without sacrificing sensitivity, has been identified as an area of needed development. Absorption spectroscopy is widely used and considered to be one of the most reliable techniques available for the qualitative and quantitative determination of sample composition. With the advancements in fiber optic technology, using light for remote in-situ sensing of groundwater contaminants has become practical. Significant progress has been made in the area of fiber-optic chemical sensors as can be seen by the number of recent review articles. The objective of this work is to develop a remote sensor for real-time measurement of actinides and concentrations in environmental or process waters based on absorption spectroscopy using internal reflection spectroscopy. Porphyrin coated silica wafers were prepared and the sensitivity and selectivity to actinides was determined