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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Interactions between polycyclic aromatic hydrocarbons and humic substances in the aqueous phase and bound to clay surfaces

Jones, Kim David 12 1900 (has links)
No description available.

Natural Organic Matter Interactions with CU(II) in groundwater.

Odem, Wilbert Irwin Jr., January 1991 (has links) (PDF)
Thesis (Ph. D. - Civil Engineering and Engineering Mechanics)--University of Arizona, 1991. / Includes bibliographical references (leaves 209-221).

The partitioning and removal of organic halide across an aerated stabilization basin (ASB) treating kraft mill wastewater.

Kostiuk, Elizabeth Ann, January 1990 (has links) (PDF)
Thesis (M. S. - Civil Engineering and Engineering Mechanics)--University of Arizona, 1990. / Includes bibliographical references (leaves 128-130).

Development and application of a new passive sampling device : the lipid-free tube (LFT) sampler /

Quarles, Lucas W. January 1900 (has links)
Thesis (M.S.)--Oregon State University, 2010. / Printout. Includes bibliographical references. Also available on the World Wide Web.

The gas-chromatographic determination of trace organic pollutants in aqueous samples.

January 1986 (has links)
by Wu Siu Yu Portia. / Bibliography: leaves 105-107 / Thesis (M.Ph.)--Chinese University of Hong Kong

Fate of trace organic priority pollutants in an enriched continuous culture system

Wei, Lian-Pang 12 1900 (has links)
No description available.

Distributions of polychlorinated biphenyls (PCB's), hydrocarbons and fatty acids among sedimentary organic matter fractions

Beller, Harry R. 07 June 1985 (has links)
Graduation date: 1986

Development of a novel magnetic photocatalyst : preparation, characterisation and implication for organic degradation in aqueous systems /

Beydoun, Donia. January 2000 (has links)
Thesis (Ph. D.)--University of New South Wales, 2000. / Also available online.

Polychlorinated biphenyl (PCB) substitute compounds in the Fox River system their identification and distribution /

Peterman, Paul H. January 1983 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1983. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 237-256).

Analysis of selected organic pollutants in water using various concentration techniques

Ramphal, Sayjil Rohith 08 August 2014 (has links)
Submitted in complete fulfillment for the Degree of Master of Technology: Biotechnology, Durban University of Technology, Durban, South Africa, 2014. / Among persistent organic pollutants, chlorobenzenes are some of the most frequently encountered compounds in aqueous systems. These compounds can enter the environment via natural and anthropogenic sources, and are ubiquitous due to their extensive use over the past several decades. Several chlorobenzene compounds, once in the environment, can biologically accumulate, and are reputed to be carcinogens and extremely hazardous to health. Several chlorobenzenes are listed as priority pollutants by the United States Environmental Protection Agency. Excessive exposure to these compounds affects the central nervous system, irritates skin and upper respiratory tract, hardens skin and leads to haematological disorders including anaemia. In spite of these harmful effects, chlorobenzenes are still used widely as process solvents and raw materials in the manufacture of pesticides, chlorinated phenols, lubricants, disinfectants, pigments and dyes. In the light of the above, it is imperative to monitor the levels of chlorinated benzenes in all types of surface waters, using low-cost but sensitive methods of preconcentration and detection. In this study, a simple and relatively cheap preconcentration method using direct immersion solid phase microextraction (DI-SPME) followed by gas chromatography equipped with a flame ionisation detector (GC-FID) was developed for the analysis of 7 chlorinated benzenes in dam water. Experimental parameters affecting the extraction efficiency of the selected chlorobenzenes, such as fibre type, sample size, rate of agitation, salting-out effect and extraction time, were optimised and applied to the Grootdraai Dam water samples. The optimised method comprises the use of a 100 µm polydimethylsiloxane (PDMS) fibre coating; 5 ml sample size; 700 revolutions per minute rate of agitation and an extraction time of 30 minutes. The calibration curves were linear with correlation coefficients ranging from 0.9957–0.9995 for a concentration range of 1–100 ng/ml. The respective limits of detection and quantification for each analyte was as follows: 1,3-dichlorobenzene, 0.02 and 0.2 ng/ml; 1,4-dichlorobenzene, 0.04 and 0.4 ng/ml; 1,2-dichlorobenzene, 0.02 and 0.2 ng/ml; 1,2,4-trichlorobenzene, 0.3 and 2.7 ng/ml; 1,2,4,5-tetrachlorobenzene, 0.09 and 0.9 ng/ml; 1,2,3,4-tetrachlorobenzene, 0.07 and 0.7 ng/ml; pentachlorobenzene, 0.07 and 0.7 ng/ml. Recoveries ranged from 83.6–107.2% with relative standard deviation of less than 9%, indicating that the method has good precision, is reliable and free of matrix interferences. Water samples collected from the Grootdraai Dam were analysed using the optimised conditions to assess the potential of the method for trace level screening and quantification of chlorobenzenes. The method proved to be efficient, as 1,3 dichlorobenzene, 1,4-dichlorobenzene and pentachlorobenzene were detected at concentrations of 0.4 ng/ml, 1.7 ng/ml and 1.4 ng/ml, respectively.

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