Author:Slabbert, JL; Venter, EADate:Oct 1999A number of aquatic toxicity tests have been established for South African use, which include fish and Daphnia lethality tests, microbiotests, and short-term chronic tests. Studies on effluents and surface waters showed that all the tests ...Read more
Author:Maree, JP; Dingemans, D; Van Tonder, GJ; Mtimkulu, SDate:1998Iron (II) should be oxidised to iron (III) before the neutralisation of acid water with limestone, otherwise the oxidation will occur downstream of the neutralisation plant with the formation of acid (reactions 1 and 2). This study aimed at ...Read more
Author:Roux, DJ; Kleynhans, CJ; Thirion, CDate:1999The output of monitoring programmes such as the National Aquatic Ecosystem Bio monitoring Programme must be used in the management of aquatic ecosystems. To achieve this, collected data must, through a systematic framework, be linked to ...Read more
Author:Greben, HA; Joubert, LM; Tjatji, MP; Whites, HE; Botha, ADate:Apr 2007A series of lignocellulosic fungi, capable of cellulase and/or xylanase production, were isolated from soil to be used for cellulose degradation and nitrate removal from nitrate-rich wastewater in simple one-stage anaerobic bioreactors ...Read more
Author:Mulopo, J; Schaefer, Lisa MDate:Mar 2015This paper evaluates the biological regeneration of ferric Fe3+ solution during desulphurisation of gaseous streams. Hydrogen sulphide (H2S) is absorbed into aqueous ferric sulphate solution and oxidised to elemental sulphur, while ferric ...Read more
Author:Meiring, PGJ; Oellermann, RADate:1995A system of oxidation ponds in series with a biological trickling filter is described. It was known that this arrangement was incapable of reducing effectively the levels of algae present in the pond liquid even though nitrification was ...Read more
Author:Greben, HA; Maree, JP; Singmin, Y; Mnqanqeni, SDate:2000Mining effluents are major contributors to mineralization of receiving waters and can be toxic to man, animals and plants due to unacceptably high concentrations of heavy metals. A biological sulphate removal process has been developed for ...Read more
Author:Vogta, T; Pieters, R; Giesy, J; Newman, Brent KDate:Jan 2019The toxic equivalences (TEQs) of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) from sediment of aquatic systems in Durban, South Africa were determined in two ways: 1) TEQs of PAHs and PCBs were determined by ...Read more
Author:Steyn, PS; Van den Heerver, JP; Vosloo, HCM; Ackerman, LGJDate:Aug 1998A chemical investigation into the composition of Zanthoxylum capense yielded several biologically active compounds, including pellitorine. A convenient HPLC method was developed to determine the presence of pellitorine in crude extracts from ...Read more
Author:Kumar, Neeraj; Mittal, H; Alhassan, SM; Ray, Suprakas SDate:2018Adsorption has emerged as a simple and economical approach to water decontamination; however, it creates large amounts of secondary toxic waste following the removal of the effluents from the water. The present investigation introduces an ...Read more
Author:Robertson Lain, L; Bernard, Stewart; Evers-King, HDate:Jul 2014There is a pressing need for improved bio-optical models of high biomass waters as eutrophication of coastal and inland waters becomes an increasing problem. Seasonal boom conditions in the Southern Benguela and persistent harmful algal ...Read more
Author:John, Maya JDate:Nov 2015Biodegradable polymer blends consisting of polylactic acid (PLA) and polyhydroxy butyrate-co-valerate (PHBV) have been prepared by melt mixing in a twin screw extruder and followed by injection molding technique. Cereplast PLA containing ...Read more
Author:Lebea, Phiyani JDate:2014The current Ebola outbreak should serve as a warning for Africa to organize itself in terms of three major points. Firstly, there needs to be a greater emphasis on developing a policy at regional or continental level to outline what the steps ...Read more
Author:Madala, NE; Steenkamp, PA; Piater, LA; Dubery, IADate:Jul 2012Nicotiana tabacum cell suspensions, 2g wet wt/ml, rapidly took up 1 mM isonitrosoacetophenone (INAP), a plant-derived stress metabolite with anti-oxidative and anti-fungal properties, producing 40-hexopyranosyloxy-30-methoxyisonitrosoacetophenone ...Read more