Adsorptive Recovery of Uranium from Nuclear Fuel Industrial Wastewater by Titanium Loaded Collagen Fiber

作者：Cheng YuanMei; Sun Xia; Liao Xuepin^*; Shi Bi

来源：Chinese Journal of Chemical Engineering, 2011, 19(4): 592-597.

DOI：10.1016/s1004-9541(11)60027-x

• collagen fiber
• titanium(IV)
• adsorption
• wastewater

Effective recovery of UO(2)(2+) from wastewater is essential for nuclear fuel industry and related industries. In this study, a novel adsorbent was prepared by loading titanium (Ti(4+)) onto collagen fiber (TICF), and its physical and chemical properties as well as adsorption to UO(2)(2+) in nuclear fuel industrial wastewater were investigated. It is found that TICF can effectively recover UO(2)(2+) from the wastewater with excellent adsorption capacity. The adsorption capacity is 0.62 mmol.g(-1) at 303 K and pH 5.0 when the initial concentration of UO(2)(2+) is 1.50 mmol.L(-1). The adsorption isotherms can be described by the Langmuir equation and the adsorption capacity increases with temperature. The effect of co-existed F(-) on the adsorption capacity for UO(2)(2+) is significant, which can be eliminated by adding aluminum ions as complexing agent, while the other co-existed ions in the solutions, including HCO(3)(-), Cl(-), NO(3)(-), Ca(2+), Mg(2+) and Cu(2+), have little effect on the adsorption capacity for UO(2)(2+). The saturated TICF after UO(2)(2+) adsorption can be regenerated by using 0.2 mol.L(-1) nitrate (HNO(3)) as desorption agent, and the TICF can be reused at least three times. Thus the TICF is a new and effective adsorbent for the recovery of UO(2)(2+) from the wastewater.

• 出版日期2011-8
• 单位四川大学