Download or read book Laser Induced Fluorescence Spectroscopy for In situ Detection of Petroleum Contamination written by and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fiber-optic chemical sensor has been developed using laser induced fluorescence (LIF) to provide high resolution, real-time, in-situ field detection of underground petroleum contamination. Recent experiments using a 308 nm XeCl laser source have shown improved performance, particularly at detecting light molecular weight (i.e. aviation) fuels.

Download or read book In Situ Spectroscopic Environmental Analysis with Transportable Tunable Dye Lasers written by Gregory D. Gillispie and published by . This book was released on 1997 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the efforts at North Dakota State University to implement laser induced fluorescence spectroscopy as a means for sensitive detection of fuel and fuel related contamination. The direction of these efforts is upon in situ detection of polycyclic aromatic hydrocarbons in well monitoring or direct push, cone penetrometer testing (CPT). We discuss conventional approaches to fuel related detection and the inherent weaknesses therein. Both laboratory and field studies involving the applications of our laser based, time domain fluorescence instrument are presented. The principles of fluorescence spectroscopy pertinent to our concerns are outlined and discussed. Since light delivery and collection are based on fiber optics, the issues relating to fiber length, composite material, cladding, and wavelength dependence are presented. A review of our experimental methods and their relation to the results is provided, along with a discussion of the relevant concerns with interpretation of system performance. Data processing methods are presented, along with the results of the processing methods used during these studies. A presentation of wavelength time matrices (WTMs) and contour plots data formats is given. Results from field studies are also presented.

Download or read book Oil Spill Detection Identification and Tracing written by Ying Li and published by Elsevier. This book was released on 2023-10-01 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oil Spill Detection, Identification and Tracing provides readers with currently applicable technical methods, including early warning monitoring of trace oil film in ports, remote sensing monitoring of sea surface oil spills, and source tracing. Beginning with the causes and characteristics of oil spills on water, chapters then evaluate a range of different detection methods, including passive optical remote sensing, active optical remote sensing, marine radar, and GNSS-R. The book then reviews oil spill traceability technology, highlighting the ecological effect of oil spills on oceanic environment, current studies on oil spill fingerprinting, and the application of stable isotope technology in oil spill tracing. The book concludes with three key case studies with real-world scenarios, making it a practical resource for students, researchers and engineers interested in oil spill pollution, environmental science and the marine environment. Includes principles and methods of emerging remote-sensing technologies (e.g., fluorescent remote sensing, marine radar, and GNSS-R to monitor oil spills) Provides a detailed introduction of oil-spill traceability technology, especially the use of stable isotope analysis for oil spill tracing Describes the application of detection, identification and tracing technologies used in marine oil spill research Focuses on prevention and remediation through technological advances

Download or read book In Situ Spectroscopic Environmental Analysis with Transportable Tunable Dye Lasers written by Gregory D. Gillispie and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the efforts at North Dakota State University to implement laser induced fluorescence spectroscopy as a means for sensitive detection of fuel and fuel related contamination. The direction of these efforts is upon in situ detection of polycyclic aromatic hydrocarbons in well monitoring or direct push, cone penetrometer testing (CPT). We discuss conventional approaches to fuel related detection and the inherent weaknesses therein. Both laboratory and field studies involving the applications of our laser based, time domain fluorescence instrument are presented. The principles of fluorescence spectroscopy pertinent to our concerns are outlined and discussed. Since light delivery and collection are based on fiber optics, the issues relating to fiber length, composite material, cladding, and wavelength dependence are presented. A review of our experimental methods and their relation to the results is provided, along with a discussion of the relevant concerns with interpretation of system performance. Data processing methods are presented, along with the results of the processing methods used during these studies. A presentation of wavelength time matrices (WTMs) and contour plots data formats is given. Results from field studies are also presented.

Download or read book Comparison of In Situ Laser Induced Fluorescence LIF Measurements of Petroleum Hydrocarbons in Soils with Conventional Laboratory Measurements written by and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This presentation reports the results of a comprehensive field validation effort in which measurements from the cone penetrometer deployed LIF sensor are compared directly with results from conventional laboratory-based chemical analyses of samples collected using traditional methods. To minimize spatial and temporal variability associated with sampling, discrete samples were collected immediately after push measurements by overboring the push hole with an auger and collecting soil samples with a split spoon sampler. Secondary fluorescence measurements were made on splits of the laboratory samples to provide direct comparison with laboratory results. All discrete samples were analyzed by EPA Methods 418.1, Total Recoverable Petroleum Hydrocarbons (TRPH) and DHS Method 8015-Modified, TPH. At some sites samples were also analyzed for SVOC, EPA Method 8270, and/or an enhanced 8270 that quantifies 40 individual polynuclear aromatic hydrocarbons (PAHs).

Download or read book Laser Induced Fluorescence Over Optical Fibers for Real Time in Situ Measurement of Petroleum Hydrocarbons in Seawater written by and published by . This book was released on 1993 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fiber optic-based fluorometer system is described that uses a pulsed laser to induce fluorescence and a time-gated linear photodiode array coupled to a spectrograph for rapid measurement of fluorescence emission spectra and fluorescence decay times. Data is presented from studies conducted in San Diego Bay where the system has been used for real-time in situ measurements of temporal and spatial variability of petroleum hydrocarbons in seawater. Results show that the optical fiber fluorometer system is capable of direct quantification of low level (parts-per-billion diesel fuel marine equivalent) concentrations of petroleum hydrocarbons. Analysis times for measurement of complete fluorescence emission spectra are fast (tens of milli-seconds) and compare with the temporal response characteristics for temperature and conductivity sensors that are used for measuring standard physical hydrographic parameters. Results obtained with the fiber optic fluorometer system during a mapping study in San Diego Bay show good correlation with GC-MS analysis of total polycyclic aromatic hydrocarbons (PAHs) measured on discrete samples collected during the study ... CIVAPP: Environmental programs, CIVAPP: Marine biology, CIVAPP: Analytical chemistry.

Download or read book Subsurface Contamination Monitoring Using Laser Fluorescence written by Katharine Balshaw-Biddle and published by CRC Press. This book was released on 2019-08-16 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: While innovative technologies in remediation need to be developed, so do innovative ways of site assessment. This monograph describes the development, testing, and performance of a new laser-induced fluorescence soil probe. A screening tool for site characterization, this probe has the potential to provide an economical, rapid assessment of contaminated sites. Cone Penetrometer testing equipment advances the probe into the subsurface. The probe identifies hydrocarbon classes using a multi-channel excitation-emission matrix. This technique facilitates the collection of significant amounts of subsurface information - surpassing conventional data collection methods - that can be used to rapidly identify areas of concern beneath a site. The technology has significant application for the following: Rapid environmental site assessment Monitoring remediation programs Monitoring manufacturing processes and industrial waste water operations Subsurface Contamination Monitoring Using Laser Fluorescence provides comprehensive reference material for researchers and engineers as well as engineering consultants interested in subsurface monitoring techniques or further development of this technology. It describes innovative technology that focuses on finding cost effective solutions for site assessment and remediation.

Download or read book Laser in Environmental and Life Sciences written by Peter Hering and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive reference work illustrates the state of the art of laser-induced analytical methods in environmental and life sciences via an interdisciplinary approach. Ky techniques for remote sensing in the atmosphere as well as diagnostic methods for soil, water and air contamination and exhaled breath are described. Each a prominent scientist, the authors report on their current research; demonstrate that multi-disciplinary applications are possible; and employ examples on how existing environmental diagnostic methods have found their way into the life sciences.

Download or read book Tri Service Characterization and Analysis Penetrometer System SCAPS Accelerated Sensor Development Project written by and published by . This book was released on 1999 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Contamination of Groundwaters written by Domy C. Adriano and published by CRC Press. This book was released on 2020-11-25 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: International experts have contributed key chapters to this major work on groundwater contamination. Section 1: Methodology and Modeling deals with both organic and inorganic contaminants, including those from agricultural operations. Section 2: Case Studies presents contamination scenarios with both inorganic and organic chemicals including agriculturally-related constituents, such as the nitrates. This important new publication is a welcome addition to the literature and will enhance recent information on methodology, modeling and real-world situations. It is of interest to scientists and planners in local and national government; environmental chemists, geochemists, geologists, and health and safety officers; river authorities; hydrologists; and the mining and land reclamation industries.

Download or read book Laser Induced Fluorescence Spectroscopy for Making In Situ Species Concentration Measurements in Turbulent Combustion Flows written by John W. Daily and published by . This book was released on 1978 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major portion of the year was spent in preliminary work with sodium. The method of saturated laser induced fluorescence spectroscopy was demonstrated for sodium and a number for problem areas were delineated and accounted for. Decay experiments were conducted to back out chemical decay rates for excited state sodium. For atomic species an alternative to fluorescence spectroscopy is near resonant Rayleigh or Raman scattering for measuring species concentrations. Experiments have been performed with sodium which show not only the feasibility of the techniques, but show that it may be extended to much higher number densities than fluorescence because of reduced trapping. Work was started on OH. A number of fluorescence and fluorescence excitation spectra were generated which will be used to develop pumping strategies.

Download or read book Special Report written by and published by . This book was released on 1990 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Induced Fluorescence Spectroscopy for the Detection of the Biodistribution of Photosensitizers written by Marigo Stavridi and published by . This book was released on 1992 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Induced Fluorometry Cone Penetrometer LIF Demonstration Plan written by and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Laser Induced Fluorometry (LIF) technologies to be demonstrated using the SCAPS CPT platform provide real-time field screening of the physical characteristics of soil and chemical characteristics of petroleum hydrocarbon contamination at hazardous waste sites. The current configuration is designed to quickly and cost-effectively distinguish hydrocarbon-contaminated areas from uncontaminated areas. Secondary to this primary attribute is the acquisition of geologic information, reduction of investigation derived waste, and other benefits. This capability allows further investigation and remediation decisions to be made more efficiently and reduces the number of samples that must be submitted to laboratories for analysis. The LIF systems to be demonstrated use a pulsed laser coupled with an optical detector to measure fluorescence via optical fibers. The measurement is made through a sapphire window on a probe that is pushed into the ground with a truck-mounted Cone Penetrometer testing (CPT). CPT and standard penetrometer testing (SPT) have been widely used in the geotechnical industry for determining soil strength and soil type from measurements of tip resistance and sleeve friction on an instrumented probe. The two LIF technologies to be demonstrated are (1) the nitrogen laser-based LIF sensor and support system currently being used in the Navy, Army, and DOE. (2) a tunable dye laser-equipped induced fluorescence system, the ROST system. The LIF methods provide data on the in situ distribution of petroleum hydrocarbons from the fluorescence response induced in the polycyclic aromatic hydrocarbon (PAH) compounds that are components of the petroleum hydrocarbon. The methods detect PAHs in the bulk soil matrix throughout the vadose, capillary fringe, and saturated zones.

Download or read book In situ Laser Induced Fluorescence Detection and Modeling of Formaldehyde Above a Forest Canopy written by John Robert Hottle and published by . This book was released on 2009 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ewing s Analytical Instrumentation Handbook Fourth Edition written by Nelu Grinberg and published by CRC Press. This book was released on 2019-02-21 with total page 975 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook is a guide for workers in analytical chemistry who need a starting place for information about a specific instrumental technique. It gives a basic introduction to the techniques and provides leading references on the theory and methodology for an instrumental technique. This edition thoroughly expands and updates the chapters to include concepts, applications, and key references from recent literature. It also contains a new chapter on process analytical technology.

Download or read book Superfund Innovative Technology Evaluation written by and published by . This book was released on 1996 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: