THE TYRMINSKY URANIUM REGION AS A PROBABLE BASE FOR THE URANIUM INDUSTRY IN THE FAR EAST

The authors show that the Far Eastern Tyrminsky uranium region, poorly studied to a depth of 80–150m from the surface, has much in common with the Streltsovsky super-large uranium region, which has been working out for 50 years to a depth of 1 km from the surface. Therefore, after exploration of the region to a depth of 500 m, it could become a likely base for the uranium industry in the Far East.

Mitigating membrane biofouling in biofuel cell system – A review

A biofuel cell (BFC) system can transform chemical energy to electrical energy through electrochemical reactions and biochemical pathways. However, BFC faced several obstacles delaying it from commercialization, such as biofouling. Theoretically, the biofouling phenomenon occurs when microorganisms, algae, fungi, plants, or small animals accumulate on wet surfaces. In most BFC, biofouling occurs by the accumulation of microorganisms forming a biofilm. Amassed biofilm on the anode is desired for power production, however, not on the membrane separator. This phenomenon causes severities toward BFCs when it increases the electrode’s ohmic and charge transfer resistance and impedes the proton transfer, leading to a rapid decline in the system’s power performance. Apart from BFC, other activities impacted by biofouling range from the uranium industry to drug sensors in the medical field. These fields are continuously finding ways to mitigate the biofouling impact in their industries while putting forward the importance of the environment. Thus, this study aims to identify the severity of biofouling occurring on the separator materials for implementation toward the performance of the BFC system. While highlighting successful measures taken by other industries, the effectiveness of methods performed to reduce or mitigate the biofouling effect in BFC was also discussed in this study.

INNOVATIVE TECHNOLOGIES AT THE URANIUM INDUSTRY ENTERPRISES

The experience of using combined geotechnologies for metal extraction in the uranium mining industry is described, including the extraction of metals by traditional development systems and development systems with leaching in underground blocks, piles and disintegrators and information on the use of world-class achievements in the mining industry of nuclear production.

A Feasibility Study Evaluating the Efficiency of Fine Coal Washing Using Gravity Separation Methods

Coal mining and washing activities in South Africa often lead to the generation of fine and ultra-fine coal which is in most cases discarded due to high handling and transportation costs. Studies conducted revealed that a large quantity of these fines have market acceptable calorific values and lower ash contents. In order to reduce fines discarded, processes have been developed to re-mine and process the fine coal discards with the aim of improving the calorific value, adding them to coarse washed coal to increase the yield as well as pelletizing the fines so as to meet the market specifications in terms of size. The goal of this study was to evaluate the efficiency of fine coal washing using gravity separation methods and comparing the products thereof to the market specifications with regards to the calorific value and the ash content. Coal fines from the No.4 lower seam of the Witbank coalfield in South Africa resulting from a dry coal sorting plant were subjected to a double-stage spiral test work, heavy liquid separation and reflux classifier test work respectively. The reflux classifier achieved products with low ash content and an increased calorific value, at high mass yields. At higher fluidization water flowrate, the reflux classifier performance was superior to that of the spirals with products of lower ash content and higher calorific value. At low cut point densities, heavy liquid separation yielded the cleanest products with very low ash content but at much lower mass yields. As the density increased, the mass yields increased with the ash content while the calorific value decreased. Most of the products from the different processes met most of the local industries’ specifications but none of them met the export market as well as the gold and uranium industry specifications due to the high ash content.

Nuclear (Geo)Political Ecologies: A Hybrid Geography of Chinese Investment in Namibia's Uranium Sector

Namibia's Husab uranium mine is the Chinese government's largest investment in Africa to date. This article develops a theoretical framework of hybridity to analyse the (geo)political and ecological implications of China's rising global influence in uranium mining. Drawing on multiple-methods fieldwork, the article explains how Husab has resuscitated Namibia's uranium industry and facilitated the political goals of both Chinese and Namibian leaders. Husab's materialisation of “South–South solidarity,” however, also appears to be deepening the marginalisation of minority communities near uranium mines. Far from paradoxical, this uneven distribution of benefits and costs is as intertwined with nuclear geopolitics as it is with the materiality of uranium mining.