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Local development and calibration of a passive sampler for monitoring of particulate matter
Dissertation (MEng)--University of Pretoria, 2019.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2020
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| _version_ | 1867613492123533312 |
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| access_status_str | Open Access |
| author2 | Kornelius, Gerrit |
| author_browse | Kornelius, Gerrit |
| author_facet | Kornelius, Gerrit |
| collection | Thesis |
| dc_rights_str_mv | © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng)--University of Pretoria, 2019. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/73458 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:00.236Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/73458 Local development and calibration of a passive sampler for monitoring of particulate matter Kornelius, Gerrit u16255781@tuks.co.za Mukota, Tinashe Air Quality Monitoring UCTD Engineering, built environment and information technology theses SDG-03 Engineering, built environment and information technology theses SDG-09 Engineering, built environment and information technology theses SDG-11 Engineering, built environment and information technology theses SDG-13 Dissertation (MEng)--University of Pretoria, 2019. The measurement of ambient particulate concentration (PM10 and PM2.5) using active monitors requires expensive or labour-intensive apparatus or both. Although PM is a priority pollutant, this has precluded widespread or intensive ambient particulate monitoring networks to be set up in South Africa, except in some priority areas. In this study, locally manufactured passive PM monitoring devices (samplers), based on a design initially published by researchers at the University of North Carolina (UNC), were calibrated for the measurement of PM10-2.5. Duplicate samplers of each type (local and UNC) were co-located at eight reference stations equipped with TEOM (Tapered element oscillating microbalance) or BAM (Beta radiation attenuation monitor) particulate monitors in three networks. Imaging of the substrate was carried out using an optical microscope to limit the cost of analysis. The images (10 to 49 per sample) were analysed using both proprietary (Zeiss AxioVision®) and open-source (ImageJ) software at 100X and 200X magnification. Considerable variation exists between the four co-located local and UNC samplers at all stations, although the latter show lesser discrepancies when analysed using the AxioVision software. Greater agreement of the local samplers and the continuous monitors is noted at a 200X and 100X magnification using the AxioVision software with R2 = 0.81 and R2 = 0.79 respectively. The precision of PM10-2.5 measured with the passive samplers was highly variable with calculated CVs ranging from 10.4% to 73.3%. 82% of the CVs were less than 40%. The average CV for all samplers was 34.6%. Passive samplers analysed using the AxioVision software recorded smaller average discrepancies of 45.3% at 100X and 37.3% at 200X magnification. Samplers analysed using ImageJ at 100X magnification exhibited the highest percentage difference from the reference values (81.2%). Using a two factor ANOVA we can show that (at 95% confidence) the analysis software and the imaging magnification have the most significant effect on the calculated sampler concentration results. A disadvantage of passive samplers is large number of days (2-7) required to produce statistically significant values hence disqualifying it for use as a reference method. The device is, therefore, more suitable for screening-level, high spatial density sampling, but some non-regulatory applications are pointed out. mi2026 Chemical Engineering MEng (Environmental Engineering) Unrestricted SDG-03: Good health and well-being SDG-09: Industry, innovation and infrastructure SDG-11: Sustainable cities and communities SDG-13: Climate action 2020-02-20T13:31:55Z 2020-02-20T13:31:55Z 2020-04-14 2019-10 Dissertation Mukota, T 2019, Local development and calibration of a passive sampler for monitoring of particulate matter, MEng (Environmental Engineering) Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/73458> A2020 http://hdl.handle.net/2263/73458 en © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Air Quality Monitoring UCTD Engineering, built environment and information technology theses SDG-03 Engineering, built environment and information technology theses SDG-09 Engineering, built environment and information technology theses SDG-11 Engineering, built environment and information technology theses SDG-13 Local development and calibration of a passive sampler for monitoring of particulate matter |
| title | Local development and calibration of a passive sampler for monitoring of particulate matter |
| title_full | Local development and calibration of a passive sampler for monitoring of particulate matter |
| title_fullStr | Local development and calibration of a passive sampler for monitoring of particulate matter |
| title_full_unstemmed | Local development and calibration of a passive sampler for monitoring of particulate matter |
| title_short | Local development and calibration of a passive sampler for monitoring of particulate matter |
| title_sort | local development and calibration of a passive sampler for monitoring of particulate matter |
| topic | Air Quality Monitoring UCTD Engineering, built environment and information technology theses SDG-03 Engineering, built environment and information technology theses SDG-09 Engineering, built environment and information technology theses SDG-11 Engineering, built environment and information technology theses SDG-13 |
| url | http://hdl.handle.net/2263/73458 |