Erik Brynjolfsson & Daniel Rock & Chad Syverson, 2021. "The Productivity J-Curve: How Intangibles Complement General Purpose Technologies," American Economic Journal: Macroeconomics, American Economic ...

Treatment of drinking water containing fluoride ion requires a robust and an effective technique. This can be achieved by the use of an appropriate sorption material in a fixed-bed filter.

Acetic acid breakthrough curves have been published previously. (37) An aqueous mixture of the acid was fed with a given acid concentration, and the breakthrough curve at the bed outlet was obtained.