Search for dissertations about: "PAHs"

Showing result 1 - 5 of 68 swedish dissertations containing the word PAHs.

  1. 1. Semipermeable membrane devices as integrative tools for monitoring nonpolar aromatic compounds in air

    University dissertation from Umeå : Kemi

    Author : Hanna Söderström; Umeå universitet.; [2004]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; air pollution; alkyl-PAHs; atmosphere; bioavailability; boundary layer; diffusive sampling; emissions; integrative; membrane; monitoring; nitro-PAHs; PAHs; particles; passive samplers; PCBs; plants; PRCs; release rate; sampler design; sources; SPMDs; traffic; uptake rate; wind effect; wood burning; Miljökemi; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi;

    Abstract : Air pollutants pose a high risk for humans, and the environment, and this pollution is one of the major environmental problems facing modern society. Active air sampling is the technique that has been traditionally used to monitor nonpolar aromatic air pollutants. READ MORE

  2. 2. Analysis of PAHs and their transformations products in contaminated soil and remedial processes

    University dissertation from Umeå : Kemi

    Author : Staffan Lundstedt; Umeå universitet.; [2003]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; polycyclic aromatic hydrocarbons; PAHs; degredation; transformation; formation; accumulation; oxidation products; metabolites; oxogenated polycyclic aromatic hydrocarbons; oxy-PAHs; soil; gasworks; remediation; bioremediation; bioslurry; wood-rotting fungi; Fenton´s reagent; avaliability; bioavaliability; chemical analysis; extraction; pressurized liquid extraction; PLE; accelerated solvent extraction; ASE; Miljökemi; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; Analytical Chemistry; analytisk kemi;

    Abstract : Soil that is heavily contaminated with polycyclic aromatic hydrocarbons (PAHs) is often found at the sites of former gasworks and wood-impregnation plants. Since PAHs are toxic these sites represent a hazard to human health and the environment, and therefore they need to be treated, preferably by a method that destroys the contaminants, and thus eliminates the problem permanently. READ MORE

  3. 3. Leaching of Polycyclic Aromatic Hydrocarbons Using a Column Method

    University dissertation from Department of Chemical Engineering, Lund University

    Author : Anja Enell; Lunds universitet.; Lund University.; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Naturvetenskap; Kemiteknik och kemisk teknologi; Chemical technology and engineering; Natural science; Miljöstudier; Environmental studies; coal tar; PAHs; desorption; soil; combustion residues; remediation; availability;

    Abstract : Polycyclic aromatic hydrocarbons (PAHs) are a group of organic pollutants of great environmental concern, due to their toxicity, carcinogenicity and long persistence in the environment. To determine the potential risk associated with PAHs released from contaminated soil or waste materials, knowledge is required on the leachable concentrations of PAHs and the amounts available for release. READ MORE

  4. 4. Evaluating effects of low concentrations of oil in marine benthic communities

    University dissertation from Chalmers University of Technology

    Author : Fredrik J. Lindgren; Chalmers tekniska högskola.; Chalmers University of Technology.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; oil; PAHs; meiofauna; microbial community; community response;

    Abstract : Large anthropogenic discharges of oil annually enter the marine environment, in the magnitude from large scale discharges to minor leakage, caused by ship collision accidents or seepage from urban areas. Possible detrimental environmental effects from these discharges differ, from acute lethal to chronic sub-lethal. READ MORE

  5. 5. Characterization of PAH-contaminated soils focusing on availability, chemical composition and biological effects

    University dissertation from Umeå : Kemi

    Author : Magnus Bergknut; Umeå universitet.; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; polycyclic aromatic hydrocarbons; PAHs; availability; bioavailability; chemical analysis; characterization; GC-TOFMS; bioassay; toxicity; biological testing; multivariate methods; PCA; PLS; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi;

    Abstract : The risks associated with a soil contaminated by polycyclic aromatic hydrocarbons (PAHs) are generally assessed by measuring individual PAHs in the soil and correlating the obtained amounts to known adverse biological effects of the PAHs. The validity of such a risk estimation is dependent on the presence of additional compounds, the availability of the compounds (including the PAHs), and the methods used to correlate the measured chemical data and biological effects. READ MORE