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Dyes from wastewater have a negative impact on health and environment, even at low concentrations. Several methods have been proposed for their removal, one of them is using hydrogels as adsorbents for wastewater treatment. In this work, we propose N,N-dimethylacrylamide and 2-hydroxyethyl methacrylate copolymer (p(HEMA-co-DMAa)) as an adsorbent alternative. Swelling behavior as function of pH and...