Sorption Characteristics of Transition Metal Ions (Co, Ni) on Sodium Humate SorbentsAuthor(s): А. S. Taubayeva, U. Z. Dzhusipbekov, G. О. Nurgalieva and H. Temel and S. Pasa
The main objective of this work was to study the possibility of using sodium humate as a sorbent for water purification of water from heavy metal ions (Co & Ni). Studied was complexing and sorption properties of sodium humate. Metal-humate complexes were also obtained by ion-exchange procedure with sodium humate by employing the metal salts such Co(CH3COO)2·4H2O, NiSO4·6H2O. Maximum sorption percentages of humate achieved for 5 ppm 91.5%, 50 ppm 90.4%, 500 ppm 68.6% for Co(II) and 90% of 5 ppm, for 50 ppm 93.25%, 500 ppm 87.43% for Ni (II). Humate and metal ion interaction was investigated with special emphasis on the effects of pH, metal ions concentration and humate concentration. It has been found that the interaction of humate with metal ions in solution decreases with increases metal ion concentration and also increases with increases humate concentration. The pH experiment was investigated in the range for cobalt sorption was performed at a constant pH of 4, pH of the nickel ratio of 5, metal concentration was selected (5 mg/L, 50 mg/L, 500 mg/L), the sorbent was determined with the amount of 0.05 g, 0.1 g, 0.25 g, 0.5 g, 1 g, and 2 g. It is stated that sorption degree increases from 15 minutes to 2 hrs. The adsorption of toxic metal ions with sodium humate was measured by atomic absorption spectroscopy (AAS). All the obtained complex compounds were analyzed and characterized by FT infrared spectroscopy (FTIR), scanning electron microscopy (SEM).