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本文制备了一种主要暴露{001}的花球状ZnO,并研究了花球状ZnO和纳米ZnO处理含铀(VI)废水的能力,比较其吸附性能。实验结果显示含{001}面更多的花球状氧化锌的吸附效果更佳,达到了2439.02 mg·g~(-1),是纳米氧化锌的两倍。热力学分析表明:吸附反应的焓变为33.78 k J·mol~(-1),吉布斯自由能从298K下的-24.13k J·mol~(-1)变为318K下的-28.67k J·mol~(-1),说明该吸附过程是吸热、自发过程。
In this paper, a flower globular ZnO mainly exposed {001} was prepared and its ability to treat uranium (VI) -containing spent spheroidal ZnO and nano-ZnO was studied. The adsorption performance was compared. The experimental results show that the flower globular zinc oxide containing more {001} surface has better adsorption effect, reaching 2439.02 mg · g ~ (-1), which is twice that of nano zinc oxide. The thermodynamic analysis shows that the enthalpy of the adsorption reaction is 33.78 kJ · mol -1, Gibbs free energy changes from -24.13k J · mol -1 at 298K to -28.67k J at 318K · Mol ~ (-1), indicating that the adsorption process is endothermic, spontaneous process.