Author:Chutter, FMDate:1971A general description of the study area be found in part 1(Chutter, 1970), where the fauna other than Cladocera and Copera of store-in-current, marginal vegetation and story backwater has been described. It was found that the streams and ...Read more
Author:Chutter, FMDate:1970Vaal Dam is situated on the elevated plateau which forms the interior of South Africa and is a little less than 1500 m above the level. The source of the most of the streams and rivers flowing into the dam are about 2000 m above sea level, ...Read more
Author:Adams, S; Titus, R; Pietersen, K; Tredoux, G; Harris, CDate:15 Jan 2001The Western Karoo depends entirely on groundwater for domestic and agricultural use. An understanding of the chemical evolution of the groundwater provides insight into the interaction of water with the environment and contributes to better ...Read more
Author:Van Niekerk, Lara; Van der Merwe, JH; Huizinga, PDate:Jan 2005For the past 20 years management of the Bot/Kleinmond estuarine system in the south-western Cape has been based on the premise that, barring intervention, the estuary was naturally evolving into a freshwater coastal lake. This paper presents ...Read more
Author:Cobbing, J; O Dochartaigh, BEDate:Jan 2007Hydrofracturing of new public water supply boreholes in Precambrian crystalline bedrock in Scotland has increased borehole yields by at least one order of magnitude, and made the difference between borehole abandonment and success. In many ...Read more
Author:Fosso-Kankeu, E; Mittal, Hemant; Marx, S; Ray, Suprakas SDate:Sep 2017Hydrogel based bioflocculants namely Gelatin and acrylic acid-co-acrylamide [GL-cl-P(AA-co-AAM)] and hybrid hydrogel composite with good adsorption potential, were synthesized in this study for the treatment of biodiesel wastewater. The two ...Read more
Author:Van Vuuren, DSDate:Jan 2007In a hydrogen economy, hydrogen is expansively being used as a means to store, distribute, and convert energy into other useful forms. Hydrogen is expensive, an efficient energy carrier, is dangerous and has low energy density. Of concern ...Read more
Author:Van Vuuren, DDate:Feb 2007This presentation looks at the platinum and gold mining industry, petrochemical industry for example Sasol, the SA automotive industry, electricity generation – Eskom & PBMR, the fuel cell industry, potential consumers, R&D community:universities ...Read more
Author:Carter, TJ; Cornish, LADate:Apr 2001The effects of hydrogen on various metals and the use of metal hydrides for hydrogen storage are discussed. The mechanisms of, and differences between, hydrogen embrittlement and hydrogen attack of ferritic steels are compared, common sources ...Read more
Author:Bhattacharya, S; Satpati, A; Maity, ArjunDate:Feb 2019Production of clean fuels like H(sub2) using renewable sources such as sunlight, through photoelectrochemical (PEC) system, is one of the promising approaches. For large-scale applications of the PEC devices, the photocatalystused should be ...Read more
Author:Rampai, MM; Mtshali, CB; Seroka, Ntalane S; Khotseng, LDate:Feb 2024One such technology is hydrogen-based which utilizes hydrogen to generate energy without emission of greenhouse gases. The advantage of such technology is the fact that the only by-product is water. Efficient storage is crucial for the practical ...Read more
Author:Langmi, Henrietta W; North, Brian C; Bessarabov, D; Lototskyy, M; Williams, M; Pollet, BGDate:Nov 2012One of HySA’s missions is to deliver technologies for hydrogen storage infrastructure that meet the set cost targets and provide the best balance of safety, reliability, robustness, quality and functionality. HySA aims to develop storage and ...Read more
Author:Langmi, Henrietta W; Bessarabov, DDate:Jul 2013Safe, efficient hydrogen storage and distribution is widely regarded as one of the major challenges facing the transition to the Hydrogen Economy. Conventionally, hydrogen is stored as compressed gas or cryogenically as a liquid. In order to ...Read more
Author:Langmi, Henrietta W; Ren, Jianwei; North, Brian C; Mathe, Mahlanyane K; Bessarabov, DDate:May 2014Metal-organic frameworks (MOFs) for hydrogen storage have continued to receive intense interest over the past decade. MOFs are a class of organic-inorganic hybrid crystalline materials consisting of metallic moieties that are linked by strong ...Read more
Author:Langmi, Henrietta WDate:Aug 2018The lack of safe, reliable and efficient hydrogen storage systems remains one of the key obstacles to the hydrogen economy. Amide-hydride systems are a promising class of hydrogen storage materials particularly for vehicular applications. ...Read more
Author:Schep, RADate:1974Low rank coals are hydrogenated and solubilized more effectively and more rapidly by a mixture of carbon monoxide and water than hydrogen. The purpose of this memorandum is to present the information presently available on the aforementioned process.Read more
Author:Van Wyk, I; Roychoudhury, AN; Maherry, A; Genthe, BettinaDate:2012Kamiesberg, located in the semi-arid regions of South Africa, depends primarily on subsurface water resources for domestic, agricultural and industrial use. In order to assess geochemical evolution of groundwater and to identify salinization, ...Read more
Author:Hobbs, PJ; Cobbing, JEDate:Aug 2007The comparatively short history of acid mine drainage (AMD) in the West Rand Basin (WRB) via mine water decant on the Randfontein Operations property (formerly Randfontein Estates Ltd) of Harmony Gold Mining Company west of Krugersdorp (Figure ...Read more