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Challenges regarding the start-up of an anaerobic biological sulphate reactor using H2 and CO2 as electron donor and carbon sources

Author: Roux, SP Date: May 2009 Include neutralization and chemical precipitation as well as membrane dependent processes. Biological sulphate reduction is another, environmentally benign option but relies heavily on the availability of an economically viable electron donor ... Read more
Comparison of CO2 and Nd:YAG laser welding of grade 250 maraging steel, IIW doc. II-A-173-06

Author: Van Rooyen, Corney ; Burger, HP ; Kazadi, BP Date: Nov 2006 Laser welding trials were performed on thin walled cylindrical Grade 250 maraging steel tubes to determine its suitability as a joining process for rocket motor casings. Bead-on-plate (BOP) and butt welded samples were produced utilising a 5 ... Read more
Empirical methods for the estimation of Southern Ocean CO2: support vector and random forest regression

Author: Gregor, Luke ; Kok, S ; Monteiro, Pedro MS Date: Dec 2017 The Southern Ocean accounts for 40 % of oceanic CO2 uptake, but the estimates are bound by large uncertainties due to a paucity in observations. Gap-filling empirical methods have been used to good effect to approximate pCO2 from satellite ... Read more
Geared for change? CO2 emissions from South Africa’s road transport sector

Author: Padayachi, YR ; Thambiran, Tirusha Date: Oct 2012 Road transport is considered to be a growing source of atmospheric emissions in African countries. In South Africa, competition in the business sector, reduction in rail usage, deregulation of freight transportation and a growing middle income ... Read more
Is the Southern Benguela a significant regional sink of CO2?

Author: Gregor, L ; Monteiro, Pedro MS Date: May 2013 This study was undertaken to characterise the seasonal cycle of air–sea fluxes of carbon dioxide (CO(sub2)) in the southern Benguela upwelling system off the South African west coast. Samples were collected from six monthly cross-shelf cruises ... Read more
Preliminary investigation into laser high voltage interaction in the case of streamer-to-leader process using a high power CO2 laser

Author: West, NJ ; Jandrell, IR ; Forbes, A Date: 2006 This paper describes the preliminary small-scale experiments conducted in order to investigate the influence of intensely focused laser light produced by a CO2 laser on high voltage fields. The laser used operated at a maximum energy of 430 ... Read more
South African integrated carbon observation network (SA-ICON): CO2 measurements on land, atmosphere and ocean

Author: Feig, Gregor T ; Mudau, Tami E ; Monteiro, Pedro MS ; Joubert, Warren Date: Oct 2016 It has become essential to accurately estimate the emission and uptake of atmospheric carbon dioxide (CO(sub2)) around the globe. Atmospheric CO(sub2) plays a central role in the Earth’s atmospheric, ocean and terrestrial systems and it has ... Read more
Storms drive outgassing of CO2 in the subpolar Southern Ocean

Author: Nicholson, Sarah-Anne ; Whitt, DB ; Fer, I ; Du Plessis, Marcel ; Lebéhot, Alice D ; Swart, S ; Sutton, AJ ; Monteiro, Pedro MS Date: Jan 2022 The subpolar Southern Ocean is a critical region where CO2 outgassing influences the global mean air-sea CO2 flux (FCO2). However, the processes controlling the outgassing remain elusive. We show, using a multi-glider dataset combining FCO2 ... Read more

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Browsing by Subject "CO2"

Browsing by Subject "CO2"

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