Determination of Cobalt in Seawater Using Neutron Activation Analysis after Preconcentration by Adsorption ontoγ-MnO₂Nanomaterial

Abstract

The -MnO 2 nanomaterial has been used to adsorb cobalt in the seawater at Phan Thiet City, Binh Thuan Province, Vietnam. Its concentration is determined by using the neutron activation analysis (NAA) method at the Dalat nuclear research reactor. Factors affecting the uptake of cobalt on the -MnO 2 material such as the pH, adsorption time, and initial cobalt(II) concentration are investigated. The irradiated experiment data are calculated using the K0-Dalat program. The results obtained show that the trace dissolved cobalt in Phan Thiet seawater is found equal to 0.25 ± 0.04 g/L ( = 5, = 95%) with the adsorption efficiency being higher than 95% ( = 4, = 95%).

Removing Cobalt ions from Industrial Wastewater Using Chitosan

“…High levels of this component can induce harmful consequences such as nausea, high blood pressure (hypertension), reproductive issues, high blood sugar (hyperglycemia), lung illness, and bone deformities, as well as possibly cause living cell mutations (genetic alterations) [5][6][7][8][9]. Acute toxicity to the plant kingdom can also be caused by a large amount of Co in the soil [10]. In live-stock irrigation and irrigation water, the allowable limits of Co (II) are 1.0 and 0.05 mg/l, respectively (Environmental Bureau of Investigation, Canadian Water Quality Guidelines).…”