Abstract
Adsorption of Cu(II) and Co(II) from aqueous solutions on synthetic nano Fe3O4 has been studied. The effect of experimental parameters such as initial concentration of the metal ions, adsorbent dosage, contact time and pH has been investigated. Optimum removal efficiency of Cu(II) ion was found to be 97.8% with the dose rate of 1.07 g/L in 60 minutes at pH = 5.5 and for Co(II) ion, it was found to be 99.2% with the dose rate of2.57 g/L in 10 minutes at pH = 5.4. The removal of Co(II) ions require only 10 minutes with the efficient removal of 99.2%, whereas Cu(II) ions require 60 minutes with the maximum removal of 97.8%. In order to understand the effective removal of Cu(II) and Co(II) ions on Fe3O4, room temperature magnetic measurement was carried out using Vibrational Spectrum Magnetometer (VSM), before and after adsorption with a maximum applied magnetic field of 20,000 G.
Highlights
The daily requirement of copper is about 2.0 mg for an adult [1]
In order to understand the effective removal of Cu(II) and Co(II) ions on Fe3O4, room temperature magnetic measurement was carried out using Vibrational Spectrum Magnetometer (VSM), before and after adsorption with a maximum applied magnetic field of 20,000 G
The adsorption experiment was carried out varying the concentration of Cu(II) and Co(II) ions (25, 50, 100, 150, 200, 250, 300, 350, 400 ppm) keeping the fixed dose of synthetic nano Fe3O4 (1.07g/L for Cu(II) ion, and 2.57 g/L for Co(II) ion), contact time (60 min), pH (5 - 6) and temperature 28 ̊C ± 1 ̊C
Summary
The daily requirement of copper is about 2.0 mg for an adult [1]. Even though copper is needed for all human beings, problems arise when it is deficient or in excess. The Environmental Protection Agency’s (EPA) lead and copper rule promulgated, in 1991, that the maximum contaminant level goal (MCLG) for copper [2] is 13 mg·L−1. The presence of excess of copper causes Wilson’s disease [3] due to which the bio-synthesis of ceruloplasmin is suppressed. The ingestion of acute toxic levels of copper may result in nausea, vomiting, diarrhea, liver damage, hemoglobinuria and hematuria. Cobalt poisoning leads to gastrointestinal distress and heart failure. The hazardous nature of heavy metals (like copper and cobalt), even in trace quantities due to their tendency for chelation and accumulation with the organic and biomolecules, makes it. Necessary to develop suitable cost-effective methods for the removal of heavy metals from waste water systems and industrial effluents fed into water stream
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