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Hydrogel Superabsorbent (HSA) CMC-g-PKA/NaAlg has been synthesized using gamma-ray irradiation as a 10 kGy crosslinker. HSA is synthesized with CMC mass variations, i.e. 1.0 g, 1.5 g, 2.0 g, 2.5 g. HSA’s ability to absorb Cu (II) metal ions has been studied using the UV-Vis spectrophotometer. The test was performed with variation of Cu (II) ion concentration i.e. 1%, 2%, 3%, 4%, and 5% for 30 minutes. The absorbance value of Cu (II) metal ions increases with increasing mass of CMC. The largest absorbance value, i.e., 74% in CMC mass 2.5 g. The FTIR test characterizes the interaction of hydroxyl (OH), amine (NH2), and Carboxylic (COOH), groups to Cu-(II) metal ions in wave number 3653,18 1/cm, 1442,75 1/cm, and 1587,42 1/cm.

ABSORBAN ION LOGAM CU (II) BERBASIS HIDROGEL SUPERABSORBAN CMC - G - PKA/NAALG DENGAN TEKNIK IRADIASI SINAR GAMMA