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. 2020 Dec 28;26(1):103. doi: 10.3390/molecules26010103

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© 2020 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) The chromium ion species in the groundwater under different pH conditions (the modified figure was adapted from Zhou et al, 2016) [37] (b) effects of pH on Cr(VI) adsorption, and (c) effects of ionic strength on Cr(VI) adsorption.