Browsing by Subject "Hexavalent chromium"
Now showing items 1-9 of 9
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Aqueous solubility of Cr(VI) compounds in ferrochrome bag filter dust and the implications thereof
(WRC, 2017)The production of ferrochrome (FeCr) is a reducing process. However, it is impossible to completely exclude oxygen from all of the high-temperature production process steps, which may lead to unintentional formation of ... -
Aqueous solubility speciation of Cr(VI) in ferrochrome bag filter dust
(North-West University, 2015)The production of ferrochrome (FeCr) from chromite ore is a reducing process, whereby the Cr(III) and Fe(II) in the ore are reduced to metallic chromium (Cr) and iron (Fe) in the final product. FeCr is mostly used for the ... -
Assessment of atmospheric trace metals and water soluble ionic species at two regional background sites
(North-West University (South Africa), Potchefstroom Campus, 2015)In this study, atmospheric trace metals and water soluble ionic species were investigated. Five research articles are presented. In the first two articles specific trace metals species, i.e. mercury and hexavalent chromium, ... -
Chromium dust deposition on plant leaves in Sekhukhuneland, South Africa, and the importance of leaf traits
(North-West University (South Africa), 2021)Chromium (Cr) is a hazardous heavy metal and its highest oxidized state, hexavalent Cr (Cr(VI)), can be carcinogenic. The ultramafic outcrops of Sekhukhuneland, South Africa, which belong to the Rustenburg Layered Suite, ... -
Cr(VI) formation during ozonation of Cr-containing materials in aqueous suspension: implications for water treatment
(WRC, 2012)Ozonation, or advanced oxidation processes (utilising ozone decomposition products as oxidants) are widely used in industrial wastewater and drinking water treatment plants. In these applications the use of ozone is based ... -
Cr(VI) generation during sample preparation of solid samples - a chromite ore case study
(WRC, 2010)South Africa holds more than 70% of the world's viable chromite ore reserves and produces ~46.2% of the world's high carbon ferrochrome. It was recently reported that beneficiated South African chromite ores contained ... -
Iron nanoparticles derived from rooibos tea extract supported polymer for Cr⁶⁺ removal
(North-West University (South Africa), 2019)Deterioration of water quality due to the presence of toxic heavy metals in environmental water resources introduced by industrial pollution is a serious matter of concern today. Only around 20% of the global wastewater ... -
Regional atmospheric Cr(VI) pollution from the Bushveld Complex, South Africa
(Elsevier, 2016)Hexavalent chromium, Cr(VI), is a proven human carcinogen. Of interest in this paper was the regional atmospheric pollution of Cr(VI) from the ferrochromium and related industries located in the western Bushveld Complex ... -
Theoretical and practical aspects of Cr(VI) in the South African ferrochrome industry
(SAIMM, 2010)The production of ferrochrome alloy from chromium bearing chromite ores is conducted at high temperature under highly reducing conditions. However, albeit completely unintended, it is impossible to completely exclude ...