Application of two receptor models for the investigation of sites contaminated with polychlorinated biphenyls : positive matrix factorization and chemical mass balance

Download

index.pdf

Date

2010

Author

Demircioğlu, Filiz

Metadata

Show full item record

Item Usage Stats

172
views

70
downloads

This study examines the application of two receptor models, namely Positive Matrix Factorization (PMF) and Chemical Mass Balance (CMB), on the investigation of sites contaminated with PCBs. Both models are typically used for apportionment of pollution sources in atmospheric pollution studies, however have gained popularity in the last decade on the investigation of PCBs in soil/sediments. The aim of the study is four-fold; (i) to identify the status of PCB pollution in Lake Eymir area via sampling and analysis of PCBs in collected soil/sediment samples, (ii) to modify the CMB model software in terms of efficiency and user-friendliness (iii) to apply the CMB model to Lake Eymir area PCB data for apportionment of the sources as well as to gather preliminary information regarding degradation of PCBs by considering the history of pollution in the area (iv) to explore the use of PMF for both source apportionment and investigation of fate of PCBs in the environment via use of Monte-Carlo simulated artificial data sets. Total PCB concentrations (Aroclor based) were found to be in the range of below detection limit to 76.3 ng/g dw with a median of. 1.7 ng/g dw for samples collected from the channel between Lake Mogan and Lake Eymir. Application of the CMB model yield contribution of highly chlorinated PCB mixtures (Aroclor 1254 and Aroclor 1260; typically used in transformers) as sources. The modified CMB model software provided user more efficient and user friendly working environment. Two uncertainty equations, developed and existing in literature, were found to be effective for better resolution of sources by the PMF model.

Subject Keywords

Environmental engineering.

URI

http://etd.lib.metu.edu.tr/upload/12612190/index.pdf
https://hdl.handle.net/11511/19739

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Analysis of the heterogeneity scale effects on pump and treat aquifer remediation design Güngör Demirci, Gamze; Aksoy, Ayşegül; Department of Environmental Engineering (2009) The effect of heterogeneity correlation scale of hydraulic conductivity (K), equilibrium distribution coefficient (Kd) and mass transfer rate on the design and cost of the P&T remediation system for different heterogeneity levels (defined by the variance (σ2lnK)) and parameter distributions under the rate-limited sorption conditions was evaluated in this study. In addition, the impacts of initial amount of contaminant mass and plume configuration on the remediation design and cost were explored. The effects...
Assessment of diffusive and convective mechanisms during carbon dioxide sequestration into deep saline aquifers Özgür, Emre; Gümrah, Fevzi; Department of Petroleum and Natural Gas Engineering (2006) The analytical and numerical modeling of CO2 sequestration in deep saline aquifers having different properties was studied with diffusion and convection mechanisms. The complete dissolution of CO2 in the aquifer by diffusion took thousands, even millions of years. In diffusion dominated system, an aquifer with 100 m thickness saturated with CO2 after 10,000,000 years. It was much earlier in convective dominant system. In diffusion process, the dissolution of CO2 in aquifer increased with porosity increase; ...
Modeling of catalytic ozonation process in a three-phase reactor Erol, Funda; Oezbelge, Tuelay A.; Oezbelge, H. Oender (Informa UK Limited, 2009-01-01) In this research, the main objective was to determine the flow characteristics of a three-phase reactor in order to use this knowledge in the modeling of catalytic ozonation of aqueous dye solutions. Therefore, the stimulus-response method was used in the tracer experiments; thus, the degree of liquid mixing in the reactor was estimated by means of residence time distribution, Peclet number and axial dispersion coefficient in the presence and the absence of the catalyst. Experimental data were obtained by p...
Quantum chemical treatment of cyanogen azide and its univalent and divalent ionic forms Türker, Burhan Lemi; Atalar, Taner (Elsevier BV, 2008-05-30) An explosive material, cyanogen azide (CN4) and its univalent and divalent anionic and cationic forms have been studied quantum chemically by using different theoretical approaches. In this study, the structures considered have been screened for their relative stabilities. Also, they have been investigated whether the charged forms play a role in the usual explosion process or any electrical charging during storage cause explosion. Various quantum chemical properties are obtained and discussed. It has been ...
Sorption of radioactive cesium and barium ions onto solid humic acid Celebi, O.; Kilikli, A.; ERTEN, HASAN NİYAZİ (Elsevier BV, 2009-09-15) In this study, the sorption behavior of two important fission product radionuclides ((137)Cs and (140)Ba) onto sodium form of insolubilized humic acid (INaA) were investigated as a function of time, cation concentration and temperature, utilizing the radiotracer method. The sorption processes are well described by both Freundlich and Dubinin-Radushkevich type isotherms. Thermodynamic constants such as: free energy (Delta G(ads)), enthalpy (Delta H(ads)), entropy (Delta S(ads)) of adsorption were determined....

Citation Formats

F. Demircioğlu, “Application of two receptor models for the investigation of sites contaminated with polychlorinated biphenyls : positive matrix factorization and chemical mass balance,” M.S. - Master of Science, Middle East Technical University, 2010.