An adsorption study of ⁹⁹Tc using nanoscale zero-valent iron supported on D001 resin

Abstract

Nanoscale zero-valent iron (nZVI) supported on D001 resin (D001-nZVI) was synthesized for adsorption of high solubility and mobility radionuclide ⁹⁹Tc. Re(VII), a chemical substitute for ⁹⁹Tc, was utilized in batch experiments to investigate the feasibility and adsorption mechanism toward Tc(VII). Factors (pH, resin dose) affecting Re(VII) adsorption were studied. The high adsorption efficiency of Re(VII) at pH= 3 and the solid-liquid ratio of 20 g/L. X-ray diffraction patterns revealed the reduction of {{\displaystyle \mathrm{Re}\mathrm{O}}}_{\mathrm{4}}^{-} into ReO₂ immobilized in D001-nZVI. Based on the optimum conditions of Re(VII) adsorption, the removal experiments of Tc(VII) were conducted where the adsorption efficiency of Tc(VII) can reach 94%. Column experiments showed that the Thomas model gave a good fit to the adsorption process of Re(VII) and the maximum dynamic adsorption capacity was 0.2910 mg/g.

Keywords

technetium / nanoscale zero-valent iron (nZVI) / D001 resin / adsorption

References

[1] Chen L S, Wang T H, Hsieh Y K, Jian L W, Chen W H, Tsai T L, Wang C F. Accurate technetium-99 determination using the combination of TEVA resin pretreatment and ICP-MS measurement and its influence on the Tc-99/Cs-137 scaling factor calculation. Journal of Radio Analytical and Nuclear Chemistry, 2014, 299(3): 1883–1889

[2] Zhu L, Sheng D, Xu C, Dai X, Silver M A, Li J, Li P, Wang Y, Wang Y, Chen L, Xiao C, Chen J, Zhou R, Zhang C, Farha O K, Chai Z, Albrecht-Schmitt T E, Wang S. Identifying the recognition site for selective trapping of T cO4− 99. Journal of the American Chemical Society, 2017, 139(42): 14873–14876

[3] Gee G W, Oostrom M, Freshley M D, Rockhold M L, Zachara J M. Hanford site vadose zone studies: an overview. Vadose Zone Journal, 2007, 6(4): 899–905

[4] Liang L, Gu B, Yin X. Removal of technetium-99 from contaminated groundwater with sorbents and reductive materials. Separations Technology, 1996, 6(2): 111–122

[5] Icenhower J P, Qafoku N P, Martin W J, The geochemistry of technetium: a summary of the behavior of an artificial element in the natural environment. Report PNNL-18139. Richland, Washington, USA: Pacific Northwest National Laboratory, 2008

[6] Rard J A, Rand M H, Anderegg G, Chemical Thermodynamics of Technetium. Amsterdam: Elsevier, 1999

[7] Lenell B A, Arai Y. Perrhenate sorption kinetics in zerovalent iron in high pH and nitrate media. Journal of Hazardous Materials, 2017, 321: 335–343

[8] Tosco T, Petrangeli Papini M, Cruz Viggi C, Sethi R. Nanoscale zerovalent iron particles for groundwater remediation: a review. Journal of Cleaner Production, 2014, 77: 10–21

[9] Sheng G, Tang Y, Linghu W, Wang L, Li J, Li H, Wang X, Huang Y. Enhanced immobilization of ReO4− by nanoscale zerovalent iron supported on layered double hydroxide via an advanced XAFS approach: implications for TcO4− sequestration. Applied Catalysis B: Environmental, 2016, 192: 268–276

[10] Li J, Chen C, Zhang R, Wang X. Reductive immobilization of Re (VII) by graphene modified nanoscale zero-valent iron particles using a plasma technique. Science China Chemistry, 2016, 59(1): 150–158

[11] Liu H F, Qian T W, Zhao D Y. Reductive immobilization of perrhenate in soil and groundwater using starch-stabilized ZVI nanoparticles. Chinese Science Bulletin, 2013, 58(2): 275–281

[12] Ding Q, Qian T, Yang F, Liu H, Wang L, Zhao D, Zhang M. Kinetics of reductive immobilization of rhenium in soil and groundwater using zero valent iron nanoparticles. Environmental Engineering Science, 2013, 30(12): 713–718

[13] Yoon I H, Bang S, Chang J S, Gyu Kim M, Kim K W. Effects of pH and dissolved oxygen on Cr(VI) removal in Fe(0)/H₂O systems. Journal of Hazardous Materials, 2011, 186(1): 855–862

[14] Xiong C, Yao C, Wang L, Ke J. Adsorption behavior of Cd(II) from aqueous solutions onto gel-type weak acid resin. Hydrometallurgy, 2009, 98(3–4): 318–324

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