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Browsing by Author "Pretorius, Cecilia J"

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Addressing airborne pollutant exposure at the source: an example of coal tar pitch volatiles (CTPV)

Author: Pretorius, Cecilia J Date: Sep 2016 Personal exposure concentrations to coal tar pitch volatiles (CTPV) were a concern in a workplace and the cause of the exposure was thought to be a particular raw material; as per the conventional belief. All the raw materials were analysed ... Read more
Assessing stationary laboratory test methods for underground mining vehicles to determine their suitability in replicating real-world emissions

Author: Wattrus, MC ; Biffi, M ; Pretorius, Cecilia J ; Jacobs, D Date: Sep 2016 Fuel, engine and after-treatment technologies are powerful levers to reduce diesel particulate matter emissions, however these benefits can only be guaranteed through routine maintenance and equipment monitoring. Portable emissions measurement ... Read more
Assessing support packs from an occupational hygiene perspective

Author: Pretorius, Cecilia J ; Teleka, Ruth Date: Jul 2017 Cementitious grout support packs are usually assessed for their strength and durability from a safety perspective. Formulations of these packs range from cement mixed with water to resin-based formulations. Over time, these packs start to ... Read more
Characterization of respirable mine dust and diesel particulate matter

Author: Mahlangu, Vusi J ; Ndibewu, PP ; Pretorius, Cecilia J Date: Nov 2015 This paper presents the preliminary outcomes to develop and optimize methods to characterize DPM and respirable dust samples for the following: Crystalline compounds Common mineral analyses Particle size distribution Elemental Carbon (EC) and ... Read more
Determination of the correlation between elemental and organic carbons to trace elemental substances and anions in DPM samples

Author: Mahlangu, Vusi J ; Ndibewu, PP ; Pretorius, Cecilia J Date: Sep 2016 The focus of the entire project is to characterize diesel particulate matter from various mining commodities into its respective constituents and to further evaluate and outline the possible identified markers for better health engineering ... Read more
Diesel engine emission deterioration - a preliminary study

Author: Pretorius, Cecilia J Date: Apr 2016 The objective of this study was to find a parameter in diesel and oil analysis of underground mining vehicles that can be correlated with personal diesel particulate matter (DPM) exposure and used as part of an engine maintenance programme. ... Read more
Emergency analytical testing: things to consider

Author: Pretorius, Cecilia J Date: Jul 2017 Circumstances may dictate that samples from mining operations are analysed for unknown compounds that are potentially harmful to humans. These circumstances may be out of the ordinary, unique or isolated incidents. Emergency analytical testing ... Read more
An evaluation of fuels and retrofit diesel particulate filters to reduce diesel particulate matter emissions in an underground mine

Author: Wattrus, MC ; Biffi, M ; Pretorius, Cecilia J ; Jacobs, D Date: Sep 2016 Through an industry wide collaborative project, this paper explores what potential exists for South African underground mines to reduce diesel particulate emissions, where the starting point is a mine using older engine technology (Tier 1 ... Read more
Screening of various diesel particulate matter samples from various commodity mines

Author: Mahlangu, Vusi J ; Pretorius, Cecilia J ; Ndibewu, PP Date: Sep 2016 This paper presents qualitative analysis results of diesel particulate matter (DPM) from various mining commodities in South Africa. The objective of this work was to determine the concentrations of elements in DPM samples. For this screening ... Read more
Screening of various diesel particulate matter samples from various commodity mines

Author: Mahlangu, Vusi J ; Pretorius, Cecilia J ; Ndibewu, PPT Date: Sep 2016 This paper presents qualitative analysis results of diesel particulate matter (DPM) from various mining commodities in South Africa. The objective of this work was to determine the concentrations of elements in DPM samples. For this screening ... Read more

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Browsing by Author "Pretorius, Cecilia J"

Browsing by Author "Pretorius, Cecilia J"

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