摘要
将钛负载在胶原纤维上制备吸附材料(TICF),并系统研究了该吸附材料对模拟氟铀废水中UO22+的吸附规律。结果表明:TICF对UO22+有较强的吸附能力,当温度为303K、pH为5.0、UO22+的初始浓度为1.50mmol·L-1时,吸附容量达到0.62 mmol U·g-1;TICF对UO22+的吸附平衡符合Langmuir方程;升高温度,平衡吸附量增大;溶液中共存的F-对TICF吸附UO22+的影响较大,但可以通过加入掩蔽剂硝酸铝来消除,而共存的Cl-、NO3-、Ca2+、Mg2+对TICF吸附UO22+没有影响,共存的Cu2+对TICF吸附UO22+有一定的影响;解吸实验表明,0.2mol·L-1的HNO3能使吸附剂再生并循环使用。
A novel adsorbent was prepared by immobilizing titanium onto collagen fiber（TICF）,and its adsorption to uranium in wastewater containing fluorine and uranium was investigated in detail.It was found that TICF has high adsorption capacity to UO2＋2 and the adsorption capacity is 0.62 mmol U·g-1 at 303 K and pH 5.0 when the initial concentration of UO2＋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 of UO2＋2 on TICF is significant,but this effect can be eliminated by adding aluminium nitrate as masking agent.Other co-existed ions,including Cl-,NO-3,Ca2＋,Mg2＋,in the solution,have no effect on the adsorption capacity of UO2＋2 on TICF,while the co-existed Cu2＋ has a certain effect.The saturated TICF can be regenerated by using 0.2 mol·L-1 HNO3 as desorption agent.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2011年第2期386-392,共7页
CIESC Journal
基金
四川省科技支撑计划项目(2008GZ0026)
国家科技支撑计划项目(2006BAC02A09)~~
关键词
胶原纤维
钛(IV)
吸附
氟铀废水
collagen fiber
titanium（Ⅳ）
adsorption
wastewater containing fluorine and uranium
