Mechanical Trajectory Control of Water Mineral Impurities in the Electrochemical-Magnetic Reactor Publisher



Naderi M¹ ; Nasseri S^{1, 2} ; Mahvi AH^{1, 3} ; Mesdaghinia A¹ ; Naddafi K^{1, 4} Show Affiliations
Source: Desalination and Water Treatment Published:2021

Abstract

The paper is focused on the study of controlling the path of ions causing hardness and salinity of water by a combination of electrolysis process and electric and magnetic fields and explaining the mechanism of the process based on magnetohydrodynamic (MHD) and magnetophoretic (MP) forces. The results showed that the highest removal efficiency of total dissolved solids (TDS) was 7.64%, the highest removal efficiency of electrical conductivity (EC) was 38.32% and the highest removal efficiency of total hardness (TH) was 36.04%. The greatest impact occurred when these two forces were applied simultaneously. Moreover, MgSO4 and CaCO3 had the greatest effect on the reduction of ions. This effect was due to the presence of oxygen atoms of MgSO4 . Oxygen atoms are considered to be strong paramagnetic particles (magnetic susceptibility of +7,699 × 10–6 m3/mol) due to their unpaired orbitals, which makes them more affected. Besides, the ions that increase the TDS and EC of water (such as NaCl and MgSO4 ) have a larger rotation diameter or Larmore radius than ions that increase water TH. The circulation of soluble ions around the central electrode was formed by the MHD force that was based on the Lorentz force, and the difference in the concentration of ions in the column was caused by the MP force that was based on the Kelvin force and as a result, more ions were transferred to the spiral paths. © 2021 Desalination Publications. All rights reserved.