Membrane technologies especially reverse osmosis (RO) is constantly helping mankind for the purification of saline water to meet the skyrocketing water demand, thereby raising their environmental concern. This work focused on the use of Cobalt and Nickel nanoparticles for the treatment of RO concentrates. The studies revealed that both Cobalt and Nickel achieved TDS removal efficiencies of 76% and 66.3% for synthetic samples respectively. Batch studies...