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. 2023 May 24;30(28):72929. doi: 10.1007/s11356-023-27842-0

Correction to: Preparation and characterization of chemically cross‑linked zwitterionic copolymer hydrogel for direct dye and toxic trace metal removal from aqueous medium

Asmaa A Koryam 1, Shaimaa T El‑Wakeel 1,✉, Emad K Radwan 1, Azza M Abdel Fattah 2, Elham S Darwish 2
PMCID: PMC10257582  PMID: 37221294

Correction to: Environmental Science and Pollution Research

10.1007/s11356-023-26966-7

The minus sign is missing in Equation 2.

The Original article has been corrected.

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