Browsing Research Articles (Chemistry) by Author "Petrik, Leslie"
Now showing items 1-10 of 10
-
Chemical, mineralogical and morphological changes in weathered coal fly ash: A case study of a brine impacted wet ash dump
Eze, Chuks P.; Nyale, Sammy M.; Akinyeye, Richard O.; Gitari, Wilson; Akinyemi, Segun A.; Fatoba, Olanrewaju O.; Petrik, Leslie (Elsevier, 2013)The mobility of species in coal fly ash (FA), co-disposed with brine using a wet ash handling system, from a coal fired power generating utility has been investigated. The study was conducted in order to establish if the ... -
Comparison of CO2 capture by ex-situ accelerated carbonation and in in-situ naturally weathered coal fly ash
Muriithi, Grace N.; Petrik, Leslie; Fatoba, Olanrewaju O.; M. Gitari, Wilson; Doucet, Frederic J.; Nel, Jaco; Nyale, Sammy M.; Chuks, Paul E. (Elsevier, 2013)Natural weathering at coal power plants ash dams occurs via processes such as carbonation, dissolution, co-precipitation and fluid transport mechanisms which are responsible for the long-term chemical, physical and geochemical ... -
Laboratory study on the mobility of major species in fly ash–brine co-disposal systems: up-flow percolation test
Fatoba, Ojo O.; Petrik, Leslie; Akinyeye, Richard O.; Gitari, Wilson; Iwuoha, Emmanuel I. (Springer Verlag, 2013)Apart from the generation of fly ash, brine (hyper-saline wastewater) is also a waste material generated in South African power stations as a result of water re-use. These waste materials contain major species such as Al, ... -
Occurrences, levels and risk assessment studies of emergingpollutants (pharmaceuticals, perfluoroalkyl and endocrine disruptingcompounds) infish samples from Kalk Bay harbour, South Africa
Ojemaye, Cecilia. Y.; Petrik, Leslie (Elsevier, 2019)A comprehensive analysis of 15 target chemical compounds (pharmaceuticals and personal care product,perfluoroalkyl compounds and industrial chemicals) were carried out to determine their concentrationsin selected commercially ... -
A review of combined advanced oxidation technologies for the removal of organic pollutants from water
Tijani, Jimoh O.; Fatoba, Ojo O.; Madzivire, Godfrey; Petrik, Leslie (Springer Verlag, 2014)Water pollution through natural and anthropogenic activities has become a global problem causing short-and long-term impact on human and ecosystems. Substantial quantity of individual or mixtures of organic pollutants enter ... -
A review of pharmaceuticals and endocrine-disrupting compounds: sources, effects, removal, and detections
Tijani, Jimoh O.; Fatoba, Ojo O.; Petrik, Leslie (Springer, 2013)There are growing concerns about the increasing trends of emerging micropollutants in the environment due to their potential negative impacts on natural ecosystems and humans. This has attracted attention from both ... -
Surface-modified polyacrylonitrile nanofibers as supports
Bode-Aluko, Chris Ademola; Pereao, Omoniyi; Fatoba, Olanrewaju; Petrik, Leslie (Springer Verlag, 2017)Polyacrylonitrile nanofibers (PAN-nfs) are one of the most studied nanofibres because of their excellent characteristics, such as good mechanical strength, chemical resistance, and good thermal stability. Due to the easy ... -
Synthesis of an ordered mesoporous carbon with graphitic characteristics and its application for dye adsorption
Boke, Nuran; Godongwana, Ziboneni G.; Petrik, Leslie (Springer, 2013)An ordered mesoporous carbon (OMC) was prepared by a chemical vapor deposition technique using liquid petroleum gas (LPG) as the carbon source. During synthesis, LPG was effectively adsorbed in the ordered mesopores of ... -
Synthesis of stabilized iron nanoparticles from acid mine drainage and Rooibos tea for application as a Fenton-like catalyst
Kimpiab, Elyse; Kapiamba, Kashala Fabrice; Petrik, Leslie (American Chemical Society, 2022)Intensive mining activities generate toxic acid mine drainage (AMD) effluents containing a high concentration of metals, including iron. The chemical synthesis of iron nanoparticles from this waste could lead to further ... -
Synthesis of zeolites from coal fly ash using mine waters
Musyoka, Nicholas M.; Petrik, Leslie; Fatoba, Ojo O.; Hums, Eric (Elsevier, 2013)In this study mine waters obtained from coal mining operations in South Africa were used as a substitute for pure water during the synthesis of zeolites from South African coal fly ash. Procedures that had been optimized ...