Berrin Tansel, John Sager
The aerobic rotational membrane system (ARMS) is one of the water recovery and recycling processes considered for use during long space missions. The purpose of this study was to investigate the permeability characteristics of ions present in the ARMS effluent through a nanofiltration membrane. Experiments were conducted in stirred dead end and cross flow filtration modes to evaluate the effectiveness of the nanofiltration process to remove dissolved solids. The rejection characteristics of the ions were evaluated in relation to ionic hydrated radius, hydration number, and ionic viscosity parameters. Permeability of ions through the nanofiltration membrane showed a strong correlation with their hydrated radii. The ions with relatively smaller crystal radii (i.e., Mg2+ and Ca2+) demonstrated higher hydration numbers and larger hydrated radii, leading to their effective removal by both filtration modes, particularly dead end filtration. Conversely, ions with larger crystal radii (i.e., K+ and Na+) exhibited weaker hydration shells, allowing them to detach more easily during membrane passage. Results consistently indicated higher permeation rates in dead end mode compared to cross flow mode operated at the same pressure.
@article{0f6f93c1-2d31-4ab0-9886-50b10bcbaa2b,
title={Significance of hydrated radius and hydr},
author={Berrin Tansel and John Sager},
year={2026},
language={en}
}TY - JOUR TI - Significance of hydrated radius and hydr AU - Berrin Tansel AU - John Sager PY - 2026 LA - en ER -
This paper addresses the challenge of assessing the feasibility of wind power plant projects at sites with insufficient or no local historic wind data
Important advances in electrochemical engineering technology over the last three decades have fostered the development of a lternative methods to alle
Increasing volumes of waste printed circuit boards from obsolete electronic equipment posed escalating environmental risks and resource losses due to
The leachability tests for manufacturing scrap TV boards (STVB) have indicated the release of metals beyond the limit levels with potential problems f