For Nanofiltration membranes, the rejection of monovalent ions range between 0% and 50% 0% and 30% 60% and 70% none of the above

To determine the rejection rates of monovalent ions by nanofiltration membranes, we need to consider the properties of these membranes and their selectivity towards different ion types.

Nanofiltration membranes are known for their ability to selectively reject a range of solutes based on their size and charge. Generally, monovalent ions such as sodium (Na⁺) and chloride (Cl⁻) have a rejection rate that can be relatively low due to their smaller size and single charges.

1. Monovalent Ion Rejection:

   • Typically, the rejection of monovalent ions by nanofiltration membranes can range from approximately 0% to 30%. This lower rejection rate is attributed to the small size and the charge of these ions, making them more permeable through the membrane.

2. Analyzing the Options:

   • Given the options:
     • 0% and 50%
     • 0% and 30%
     • 60% and 70%
     • None of the above
   • Based on the information about nanofiltration membranes, the most accurate range falls within the 0% to 30% option.

Final Answer

The correct answer is 0% and 30%.