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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
In vitro experiment. Recirculation of an experimental solution in a closed circuit containing the resin sorbent to be tested. Solution samples to be tested were collected after passing through the resins after 1, 3, and 6 hours.