TY - JOUR ID - TI - Effect of Operating Conditions on the Removal of Heavy and Radioactive Elements by Reverse Osmosis Membrane AU - Waleed T. Rashid AU - Israa A. Alkadir AU - Moayyed G. Jalhoom PY - 2020 VL - 13 IS - 3 SP - 240 EP - 245 JO - Al-Qadisiyah Journal for Engineering Sciences مجلة القادسية للعلوم الهندسية SN - 19984456 24117773 AB - The major goal of the presented study is to study the Reverse Osmosis (RO) characteristics for (Cd, U, Pb, Cu, Zn, K, Th, and Ni) removal from an aqueous solution containing Phosphogypsum. This was performed done by examining the impact related to temperature and pressure on the performance regarding the RO membrane in the removal of elements with time. Values of temperatures (25, 35, and 45o C) and various pressures such as (2, 4 and 6 bars) were used in this work. It was found that, as the pressure increases, the flux permitted and rejection of elements would be increased, where were the values of maximum rejection of elements 81,90.9,90.9,77.5,80.2,93.9,92.9 and 76.6% for Cd, U, Pb, Cu, Zn, K, Th, and Ni respectively, when operating time 90 minutes and pressure 6 bar. The temperature increases the flux permitted while the rejection of elements was steady state almost with the increase in temperature for all heavy and radioactive elements. It was also shown shows that these a steady-state has stopped after 35 ºC and rejection start to decrease until reaching 75,85.4,86.2,73.8,74,91.2,86.2 and 69% for Cd, U, Pb, Cu, Zn, K, Th, and Ni respectively.

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