Abstrak: The research has been
conducted on the adsorption of cadmium(II) ion from its solution by using biomassa
roots and stems of water spinach (Ipomoea Aquatic Forsk). Theaim of the
research was to determine optimum pH and concentration of cadmium(II) metal
adsorbed by biomass root and stems of
water spinach. The method used this study was laboratory experiments with 0.1
grams of roots and stems of water spinach powder as adsorbent and 25 mL of the
cadmium(II) solution. The variation of pH was 1, 2.3, 4.5, 6.7, and 8, while
the concentration was 100 ppm, 200 ppm, 300 ppm, 400 ppm, 500 ppm, 600 ppm, and
700 ppm. Determination of cadmium(II) ion adsorbed by the adsorbent has been
performed using Atomic Adsorption Spectrophotometer (AAS). The measurement
showed that the optimum pH of cadmium(II) ion adsorbed by the root of water
spinach was at pH 4, and by the stems was at pH 3. While the optimum
concentration of metal cadmium(II) solution adsorbed by the biomass of roots
and stems of water spinach was 600 ppm, the same as the adsorption powerof
91.862 mg/g for root and 91.118 mg/g for stems respectively.
Keywords: Adsorption, Water
Spinach (IpomeaAquaticaForsk), Ion Cadmium(II)
Penulis: Iffatunniswah Suhud,
Vanny M. A. Tiwow dan Baharuddin Hamzah
Kode Jurnal: jpkimiadd120114
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