Abstract
The paper reports the removal of phosphorus and natural organic matter (NOM) from surface water by dynamic membrane (DM) adsorber. DM filter builds up as a layer of particles deposited via permeation through the membrane’s surface. This study reports the application of Heated Aluminium Oxide Particles (HAOPs) as a dynamic membrane adsorber. Filtration experiments were conducted with surface water and batch tests were carried out with synthetic water. The efficiency of phosphorus removal along with the efficiency of organics (represented as UV-254) removal was evaluated. Additionally, the impact of HAOPs surface loading on the changes of transmembrane pressure (TMP), the kinetics, isotherm modeling of the adsorption and the effect of the pH, the effect of ionic strength, the effect of coexisting organic matter on phosphorus removal efficiency were studied. In the case of phosphorus removal in batch adsorption experiments, its sorption kinetic and isotherm data were analyzed using pseudo-first- and pseudo-second-order models and Langmuir and Freundlich models, respectively. The results indicated that Langmuir adsorption isotherm fits the experimental data best (0.9894). The kinetics of phosphorus adsorption on HAOPs was best described by the pseudo-second-order model and the best removal was achieved at the pH 6–7 (96.65% on average). An increase in ionic strength did not impact the efficiency of phosphorus removal significantly. The outcome of this study highlights HAOPs efficiency in NOM removal up to 92% in filtration experiments. In the case of phosphorous, removal efficiency varied. For the highest HAOPs dose, the degree of phosphorus removal ranged up to 93 ± 5%. The same removal efficiency was observed for the lowest dose while for 17 g/m2 of HAOPs the fluctuations were larger and varied from 64.7% to 92%. The results demonstrate that HAOPs could potentially be applied in the removal of phosphorus from surface water, especially when there is a high concentration of phosphorus in the water. However, this process requires further research and optimization of its parameters.
Highlights
Dynamic membrane (DM) applications have been studied extensively for water filtration and wastewater treatment in recent years [1,2]
Scanning Electron Microscopy (SEM) imaging confirms that Heated Aluminium Oxide Particles (HAOPs) were deposited on the surface of the PES membrane
In the case of natural organic matter (NOM), the results indicate that the prorate of removal was much lower and remained just below 60% on average
Summary
Dynamic membrane (DM) applications have been studied extensively for water filtration and wastewater treatment in recent years [1,2]. DM is formed when a layer of particles from feed water is deposited onto the membrane surface. This dynamically formed and porous filtration layer is used as a physical barrier that is called a secondary membrane. Two basic categories of DMs have been reported: A self-forming DM and a pre-deposited one. Unlike the pre-deposited DMs, where the secondary membrane is created through the filtration of solutions containing specific particles or colloids [2], the self-forming DMs are generated
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
