Removal of manganese (II) from aqueous solution by ionic liquid impregnated polymeric sorbent and electrodeionization (EDI) techniques

Manganese is an element that is essential for the proper functioning of humans and animals, as it is needed for the functioning of many cellular enzymes. However, overexposure to this metal can be toxic to many organ systems and at various stages of life. In this work, ionic liquid impregnated polymeric sorbent (ILIS) and electrodeionization (EDI) processes were used to remove manganese (Mn2+) from aqueous solutions. The removal of Mn2+ by ILIS is pH dependent and maximum removal is achieved at pH 9. The sorption of Mn2+ on ILIS reached equilibrium in 20 min. For Mn2+ removal by EDI, the applied potential, feed flow rate and H2SO4 concentration in the electrode compartment were optimized. When the applied potential and feed flow rate were increased, the Mn2+ concentration in the feed solution decreased. Varying the H2SO4 concentration in the electrode compartment did not result in differences in the removal rate. The largest calculated flux for Mn2+ is 6.92 x 10-5 mol/m2s, and the mass transfer coefficient is 8.16 x 10-4 m/s. In the last phase of the experiment, ILIS-EDI hybrid techniques were used for the removal of Mn2+. In this case, more than 99.9% was removed from the solution. (c) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.Scientific Research Projects Coordination Office of Ege University [FGA-2019-20491]This study is supported by the Scientific Research Projects Coordination Office of Ege University (project number: FGA-2019-20491). We thank AGC Engineering Co. (Japan) for providing membranes, Purolite Int. Co. and Mitsubishi Chemical Co. for providing ion exchange resins and polymeric sorbent samples. We also thank Solvay Company for the Cyanex samples. We thank Ozan Ali Dundar for his valuable comments and assistance with this work. The authors also thank Dr. Mehmet Balcan for his valuable comments on kinetic modelling

Influence of the chosen process parameters on the efficiency of seawater desalination: SWRO pilot plant results at Urla Bay seashore

EuroMedLab 2008 Conference -- NOV 09-13, 2008 -- Dead Sea, JORDANWOS: 000267309400025The most widely used desalination method used in order to produce potable water from seawater is reverse osmosis (RO). In this study, desalination tests were performed at a seashore of Urla Bay, Izmir, Turkey. The tests were carried out at different pressures (55-62 bar) using a single RO module at different feed seawater temperatures (10-15 degrees C). Variables Such as pH, conductivity, TDS, salinity, turbidity, relative rejection of some ions (Na+, K+, Ca2+, Mg2+, HCO3-) and B levels in permeates collected were measured