红背桂叶提取液合成纳米铁及对U(Ⅵ)的去除研究
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摘要
采用红背桂叶提取液,制备纳米铁(EL-FeNPs),用于去除水体中的铀离子[U(Ⅵ)],并对绿色合成的EL-FeNPs去除U(Ⅵ)反应前后的微观结构进行表征和分析,观察其反应前后的形态结构。考察了EL-FeNPs的投加量、pH、U(Ⅵ)溶液的初始浓度、反应温度及反应时间等因素对EL-FeNPs去除U(Ⅵ)的影响。研究结果表明:EL-FeNPs呈球状,且均匀分布,其粒径25～45nm。在30℃,pH=6,EL-FeNPs用量5g/L,U(Ⅵ)初始浓度10mg/L,反应时间100min条件下,EL-FeNPs对U(Ⅵ)的去除率为89.64%。
Iron-based nanoparticles(EL-FeNPs)were synthesized by the leaf of excoecaria cochinchensis used to remove U(Ⅵ)in aqueous solution.EL-FeNPs were characterized by SEM,XRD,EDS and FT-IR before and after the reaction.The effects of the experimental conditions,such as pH,the dosage of EL-FeNPs,the initial concentration of U(Ⅵ),the reaction temperature and the reaction time were investigated.The results showed that EL-FeNPs were spherical and uniformly dispersed,the size of EL-FeNPs was 25～45 nm.The optimum removal conditions were as follows:Initial U(Ⅵ)concentration of 10 mg/L,temperature of 30℃,reaction time of 100 min,pH 6,dosing ratio of EL-FeNPs/U(Ⅵ)of 5 g/L.The removal of U(Ⅵ)using EL-FeNPs were 89.64%.
Iron-based nanoparticles(EL-FeNPs)were synthesized by the leaf of excoecaria cochinchensis used to remove U(Ⅵ)in aqueous solution.EL-FeNPs were characterized by SEM,XRD,EDS and FT-IR before and after the reaction.The effects of the experimental conditions,such as pH,the dosage of EL-FeNPs,the initial concentration of U(Ⅵ),the reaction temperature and the reaction time were investigated.The results showed that EL-FeNPs were spherical and uniformly dispersed,the size of EL-FeNPs was 25～45 nm.The optimum removal conditions were as follows:Initial U(Ⅵ)concentration of 10 mg/L,temperature of 30℃,reaction time of 100 min,pH 6,dosing ratio of EL-FeNPs/U(Ⅵ)of 5 g/L.The removal of U(Ⅵ)using EL-FeNPs were 89.64%.
引文
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[4] Iravani S.Green synthesis of metal nanoparticles using plants[J].Green Chemistry,2011,13(10):2638-2650.
[5] Philip D.Green synthesis of gold and silver nanoparticles using hibiscus rosa sinensis[J].Physica E(Low-dimensional Systems and Nanostructures),2010,42(5):1417-1424.
[6] Weng X L,Huang L L,Chen Z L.Synthesis of iron-based nanoparticles by green tea extract and their degradation of malachite[J].Industrial Crops and Products,2013,51:342-347.
[7] 金晓英,黄兰兰,陈祖亮.CTAB作用下绿色合成纳米铁的制备及降解孔雀绿[J].环境科学学报,2014,34(3):645-650.
[8] Shahwan T,Sirrlah S A,Nairat M,et al.Green synthesis of iron nanoparticles and their application as a fenton-like catalyst for the degradation of aqueous cationic and anionic dyes[J].Chemical Engineering Journal,2011,172(1):258-266.
[9] Mttal A K,Chisti Y,Banerjee U C.Synthesis of metallic nanoparticles using plant extracts[J].Biotechnology Advances,2013,31(2):346-356.
[10] 王业玲,黎平,郭凯静,等.红背桂化学成分研究[J].天然产物研究与开发,2014,26(1):47-49.
[11] 陈兵祥,王小玲.红背桂花的化学成分研究[J].药学研究,2015,34(3):147-149.
[12] Huang L L,Weng X L,Chen Z L,et al.Synthesis of ironbased nanoparticles using oolong tea extract for the degradation of malachite green[J].Spectrochimica Acta Part A(Molecular and Biomolecular Spectroscopy),2014,117:801-804.
[13] Luo F,Chen Z L,Mallavarapu M,et al.Biomolecules in grape leaf extract involved in one-step synthesis of iron-based nanoparticles[J].Rsc Advances,2014,4:53467-53474.
[14] Lu F F,Sun D H,Huang J L,et al.Plant-mediated synthesis of Ag-Pd alloy nanoparticle and their application as catalyst towardselective hydrogenation[J].Acs Sustainable Chemistry&Engineering,2014,2(5):1212-1218.
[15] Wang T,Jin X Y,Chen Z L,et al.Green synthesis of Fe nanoparticles using eucalyptus leaf extracts for treatment of eutrophic wastewater[J].Science of the Total Environment,2014,466/467:210-213.