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Browsing by Author "Pretorius, PJ"

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Adsorption characteristics of delta-manganese dioxide: a collection of diffuse double layer constants for the adsorption of H+, Cu2+, Ni2+, Zn2+, Cd2+ and Pb2+

Author: Pretorius, PJ ; Linder, PW Date: Jul 2001 Thermodynamic data for all fate-determining processes are needed in order to predict the fate and transport of metals in natural systems. The surface complexation properties of a synthetic MnO2, delta -MnO2, have accordingly been investigated ... Read more
Chemical behaviour of heavy metals and their bioavailability and toxicity to organisms: implications for environmental quality criteria

Author: Pretorius, PJ ; Linder, PW ; Slabbert, JL ; Wade, PW Date: Sep 2001 Observed mortalities of Daphnia pulex exposed to a single concentration of zinc in different test waters are explained in terms of the chemical behaviour of zinc in solution, as predicted by chemical speciation modelling. Multivariate correlation ... Read more
Determination of diffuse double layer protonation constants for hydrous ferric oxide (HFO): supporting evidence for the Dzombak and Morel compilation

Author: Pretorius, PJ ; Linder, PW Date: 1998 The acid-base properties of hydrous ferric oxide were studied by glass electrode potentiometry. From the potentiometric data, surface protonation constants were derived according to the Diffuse Double Layer convention. Chemical equilibrium ... Read more
Surface chemical properties of novel high surface area solids synthesized from coal fly ash

Author: Pretorius, PJ ; Woolard, CD Date: 23 Jul 2003 The zeolite, Na-P1, was synthesized from fly ash samples originating from coal-fired power stations in South Africa by hydrothermal treatment of the raw ash with concentrated aqueous NaOH solutions. The zeolite was then further modified by ... Read more

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Browsing by Author "Pretorius, PJ"

Browsing by Author "Pretorius, PJ"

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