An in Situ Laser-induced Fluorescence System for Polycyclic Aromatic Hydrocarbon-contaminated Sediments PDF Download

Author: Timothy Grundl
Publisher:
ISBN:
Category : Contaminated sediments
Languages : en
Pages : 54

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Author: Vivek Kumar
Publisher: Springer
ISBN: 9811318409
Category : Medical
Languages : en
Pages : 664

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Book Description
The book discusses ways to overcome the side effects of using hydrocarbon-based products as energy sources. Hydrocarbons produce raw crude oil waste of around 600,000 metric tons per annum, with a range of uncertainty of 200,000 metric tons per year. The various chapters in this book focus on approaches to reduce these wastes through the application of potential microbes, in a process called bioremediation. The book is a one-stop reference resource on the methods, mechanisms and application of the bio-composites, in the laboratory and field. Focusing on resolving a very pressing environmental issue, it not only provides details of existing challenges, but also offers deeper insights into the possibility of solving problems using hydrocarbon bioremediation.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 9

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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.

Author: Division on Engineering and Physical Sciences
Publisher: National Academies Press
ISBN: 0309054931
Category : Nature
Languages : en
Pages : 318

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Contaminated marine sediments threaten ecosystems, marine resources, and human health. They can have major economic impacts when controversies over risks and costs of sediment management interfere with needs to dredge major ports. Contaminated Sediments in Ports and Waterways examines management and technology issues and provides guidance that will help officials make timely decisions and use technologies effectively. The book includes recommendations with a view toward improving decision making, developing cost-effective technologies, and promoting the successful completion of cleanup projects. The volume assesses the state of practice and research and development status of both short-term and longer-term remediation methods. The committee provides a conceptual overview for risk-based contaminated sediment management that can be used to develop plans that address complex technological, political, and legal issues and the interests of various stakeholders. The book emphasizes the need for proper assessment of conditions at sediment sites and adequate control of contamination sources.

Author: Marine Board
Publisher: National Academies Press
ISBN: 0309522579
Category : Science
Languages : en
Pages : 317

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Book Description
Contaminated marine sediments threaten ecosystems, marine resources, and human health. They can have major economic impacts when controversies over risks and costs of sediment management interfere with needs to dredge major ports. Contaminated Sediments in Ports and Waterways examines management and technology issues and provides guidance that will help officials make timely decisions and use technologies effectively. The book includes recommendations with a view toward improving decision making, developing cost-effective technologies, and promoting the successful completion of cleanup projects. The volume assesses the state of practice and research and development status of both short-term and longer-term remediation methods. The committee provides a conceptual overview for risk-based contaminated sediment management that can be used to develop plans that address complex technological, political, and legal issues and the interests of various stakeholders. The book emphasizes the need for proper assessment of conditions at sediment sites and adequate control of contamination sources.

Author: Gregory D. Gillispie
Publisher:
ISBN:
Category : Fluorescence spectroscopy
Languages : en
Pages : 0

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Book Description
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.

Author:
Publisher:
ISBN:
Category : Polycyclic aromatic hydrocarbons
Languages : en
Pages : 500

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Author: Stephen Lieberman
Publisher:
ISBN:
Category :
Languages : en
Pages : 2

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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).

Author: Diane LeAnna Peterson
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Stephen M. Rudnick
Publisher:
ISBN:
Category :
Languages : en
Pages : 919

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