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. 2018 Jun 3;11(6):939. doi: 10.3390/ma11060939

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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) Effect of pH on AO7 removal efficiency and K_obs as a function of HRT, (b) Zeta potential (ζ) of Fe/N-TiO₂ (initial AO7 concentration = 200 mg/L, catalyst dosage = 20 g/L, visible light intensity = 35mW/cm²).