Antiviral metal treatments for fiber substrates, filter media having antiviral metal treatments, and processes for treating fiber substrates

A process for treating a fiber substrate, the process comprising:

• providing a fiber substrate, wherein the fiber substrate comprises glass fibers;
• introducing the fiber substrate to a salt solution, wherein the salt solution comprises one or more cations having an ionic charge of +2 or greater;
• depositing the one or more cations having an ionic charge of +2 or greater onto the fiber substrate;
• and
• drying the fiber substrate, after the one or more cations having an ionic charge of +2 or greater have been deposited,
• wherein an amount of the one or more cations having an ionic charge of +2 or greater on the fiber substrate is increased.