An investigation was carried out regarding the removal of pollutants such as nitrate and pesticides from actual ground water samples obtained in Slovenia, by the use of two new adsorption resins. The adsorption resins were successfully used for pesticides' removal among the tested adsorption media, whereas the removal of nitrates was unsuccessful. The reverse osmosis membrane displayed a high rejection of all compounds.
COBISS.SI-ID: 13221910
An investigation was carried-out on the effects of electrostatic interactions on the rejection of organic solutes for two NF membranes. The rejection of selected organic acids, positively and negatively charged pharmaceuticals, and neutral pharmaceuticals was investigated regarding different feed water chemistries. It was concluded that, for negatively charged membranes, electrostatic repulsion leads to an increase in the rejection of negatively charged solutes, and electrostatic attraction leads to a decrease in the rejection of positively charged solutes, compared to neutral solutes.
COBISS.SI-ID: 12962326
A synthetically prepared reactive dye print wastewater, was treated by nanofiltration using an NFT-50 membrane in a plate and frame module configuration at different cross-flow velocities and pressures (2-15 bar). The nanofiltration membrane was evaluated for membrane fouling, permeate flux and its suitability for removing colour, conductivity, Na+ ions and COD as a function of operating pressure and feed concentration. The membrane achieved high dye retention for each of the four dyes (from 99.4 to 99.9%) and electrolytes used (63-73%).
COBISS.SI-ID: 11062038
The aim of the research was to compare the results of two differently designed measuring cells ('Adjustable Gap Cell' and 'Clamping Cell') but operating on the same principle. The results obtained with 'Clamping Cell' versus 'Adjustable Gap Cell' showed differences in zeta potential, where the 'Adjustable Gap Cell' gave more reproducible results. One reason for this behaviour could be the different geometries of the streaming channels. A more likely reason is the design of the 'Clamping Cell', that requires a sample size larger than necessary for zeta potential determination.
COBISS.SI-ID: 14417686
By measuring individual parameters and the implementation of chemical analysis, the satisfactory functioning of the MBR system, was demonstrated because the efficiency value regarding COD reduction and the elimination of dyes, expressed as SAC (Spectral Absorption Coefficient), reached from 70 to 90% for both parameters. From results, it is shown, that the removal efficiency of COD was 90%, respectively, and the removal efficiency of dyes reached 97%.
COBISS.SI-ID: 14791446