Synthesis of Surfactant Stabilized Nanoscale Zero-valent Iron ( NZVI ) Particles and their Potential Application for the Remediation of Urarum(VI) from Contaminated Water

摘要

Uranium (VI) is a highly soluble, mobile and toxic species that exists mainly as complexed, adsorbed or precipitated uranyl ion. In the current study, biosurfactant-stabilized Nanoscale zero valent iron (NZVI) were prepared and their potential application to remove Uranium (VI) was investigated in batch adsorption studies at varying pH and adsorbent dosages. The results of the study showed that 95% of the NZVI were within the range of 45-60 nm in diameter and effective for removing U(VI) from aqueous solutions. At 0.15g NZVI/L of 10 mg/L U(VI) contaminated water, 57.7% of uranium was removed and the removal efficiency increased to 99.8% when using 4g/L of NZVI. The experimental data of adsorption of U(VI) obeyed the Langmuir isotherm best with maximum adsorption capacity of 40.67 mg/g of adsorbent at pH 5. These observations indicated that NZVI nanoparticles can be considered as potential adsorbents to remediate radionuclide contaminated water.