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. 2018 Mar 3;15(3):441. doi: 10.3390/ijerph15030441

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© 2018 by the authors.

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/).

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(a) Ammonia accumulation in (NH₄)₂SO₄ solution as a function of time; (b) The NH₃-N concentrations in both feed and receiving solutions as a function of time using the modified MD (receiving solution: 10 °C ice deionized water).