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. 2021 Jul 28;9:662482. doi: 10.3389/fchem.2021.662482

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Copyright © 2021 Wang, Liu, Wang, Zong, Kang and Wang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Effect of PVA content on the adsorption capacity (A) and the gel strength (B). Adsorption conditions: initial Pb(II) concentration, 1,150 mg/L; adsorbent dosage, 2 g/L; adsorption time, 120 min; pH, 5.0; adsorption temperature, 30°C.