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Now showing items 11-20 of 34
Assessing atmospheric trace gas concentrations in rural areas of the North West Province
(North-West University (South Africa), 2020)
Anthropogenic activities are increasing the ambient atmospheric concentrations of inorganic gaseous pollutants, which include nitrogen dioxide (NO₂), sulphur dioxide (SO₂), and ozone (O₃). These species were also included ...
Air quality assessment of the industrialized western Bushveld Igneous Complex
(North-West University, 2011)
South Africa has the largest economy in Africa, with significant mining and
metallurgical activities. A large fraction of the mineral assets is concentrated in the Bushveld Igneous Complex (BIC), with the western limb ...
Factors governing rain chemistry and wet deposition at a regional background site in South Africa
(North-West University (South Africa), 2020)
Wet deposition is an atmospheric sink that is essential to sustain the Earth-atmosphere biogeochemical balance. Deposited species can either be introduced as nutrients or toxins into a surface environment, which can be ...
Aerosol optical properties at a savannah grassland site in South Africa
(North-West University (South Africa), 2020)
Atmospheric aerosols affect the earth’s radiative budget in two ways: firstly, particles directly absorb and scatter short- and long-wave radiation and, secondly, particles indirectly influence the lifetime and physical ...
Background ambient atmospheric mercury concentrations for the South African interior
(North-West University (South Africa), 2021)
Atmospheric mercury (Hg) pollution is a global health concern. Once emitted into the atmosphere, gaseous elemental mercury (Hg0) can be converted to highly reactive gaseous oxidised mercury (Hg2+), which is deposited to ...
Source apportionment of hydrogen sulphide at Elandsfontein in Mpumalanga Highveld
(North-West University, 2019)
As far as the candidate could assess, no H?S source apportionment has been conducted for the Mpumalanga Highveld, an area with known air quality problems. The lack of such assessments is due to current receptor-oriented ...
Atmospheric SO₂ and NO₂ flux measurements at a savannah-grassland-agriculture landscape in South Africa
(North-West University (South Africa), 2019)
Deposition measurements of SO2 and NO2 in South Africa are mainly limited to passive sampling where a constant deposition velocity is assumed for a specific land use category. Gaseous deposition velocities in South Africa ...
The use of hydrogen as a reductant in the smelting industry
(North-West University (South Africa), 2022)
Both the smelting of chromite and manganese (Mn) ores consume a significant amount of carbon (C) and electrical energy. The smelting processes contribute to the elevation of carbon dioxide (CO2) emissions in the atmosphere ...
Measurement of organic compounds in atmospheric aerosols collected at Welgegund, South Africa
(North-West University, 2018)
Atmospheric aerosols or particulate matter (PM) are a complex mixture of solid and liquid particulates suspended in the atmosphere that originate from natural and anthropogenic sources. These species influence climate ...
Factors influencing surface ozone variability over continental South Africa and implications for air quality and agriculture
(North-West University, 2018)
Extensive scientific research has been conducted on surface ozone (O3) concentrations over several decades in North America and Europe. Through these efforts, significant information is available on the role of chemistry, ...