利用向日葵提取液绿色合成碳纳米管负载纳米铁复合材料(N-Fe/CNT),用于去除水体中的铀。考察投加量、pH、U(Ⅵ)初始浓度、反应温度和反应时间等因素对N-Fe/CNT去除铀的效果,利用X射线衍射、扫描电镜、X射线能谱和红外光谱等技术对N-Fe/CNT微观结构进行表征分析。结果表明:在投加量为5g/L、pH=5、U(Ⅵ)初始浓度为10mg/L、反应温度为40℃、反应时间为90min条件下,N-Fe/CNT对铀的去除率为97.2%。
Fe nanoparticles supported on carbon nanotubes (N-Fe/CNT) were green synthesized using sunflower extract were prepared to remove uranium from water.The nanocomposites were characterized by XRD,SEM,EDS and FT-IR to analyze the mechanism of uranium removal,and the optimum parameters of removing process was also determined.Experiments shown that the removal rate of uranium reached 97.2% at the condition of pH=5,the dosage of 5g/L,the reaction time of 90min,the reaction temperature of 40℃ and the initial uranium concentration of 10mg/L.
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基金资助
国家自然科学基金青年基金项目(51304122);南华大学“青年英才”人才支持计划资助项目(南华政发[2014]49号)
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