大米草对溶液中铀的吸附特性研究
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摘要
本文以东部沿海滩涂广泛存在的大米草作为原材料,制备吸附剂,通过静态试验研究大米草对溶液中铀离子的吸附特性。研究表明,大米草生物质吸附剂对溶液中铀离子的吸附在溶液pH=4,吸附剂用量为4g·L~(-1)时吸附效果最好;吸附反应120min达到吸附平衡;在10-400 mg·L~(-1)范围内吸附量随铀离子浓度的增大而增大;在30℃条件下饱和吸附量最大可达21.38mg·g~(-1);Langmuir模型、Freundlich模型和Redlich-Peterson模型均能够很好地拟合大米草吸附铀离子的吸附等温线,而且Redlich-Peterson模型的拟合效果最好,由此可以推测,大米草对溶液中铀离子的吸附一个复杂的吸附过程,物理吸附和化学吸附同时存在;准二级动力学模型能够较好地描述大米草生物质吸附剂吸附溶液中的铀离子的动力学过程。
引文
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[15]Nihal B,Akman A B,Serdar K.Kinetic and equilibrium studies in removing lead ions from aqueous solutions by natural sepiolite[J].Journal of Hazardous Materials,2004,112(1-2):115-122.
[16]Tunali S,T Akar,A S 0 zcan,et al.Equilibrium and kinetics of biosorption of lead(II)from aqueous solutions by cephalosporium aphidicola[J].Separation and Purification Technology,2006,47(3):105-112.
[17]Fiol N,Villaescusa I,Martinez M,et al.Sorption of Pb(II),Ni(II),Cu(II)and Cd(II)from aqueous solution by olive stone waste[J].Separation and Purification Technology,2006,50(1):132-140.
[2]李小燕,刘义保,花明,高柏.花生壳吸附溶液中铀的研究[J].水处理技术,2012,38(3):38-43.
[3]聂小琴,董发勤,刘明学等.生物吸附剂梧桐树叶对铀的吸附行为研究[J].光谱学与光谱分析,2013,33(5):1290-1294.
[4]Saeed B,Amir L,Mohammad F.Uranium removal from aqueous solutions by wood powder and wheat straw[J].Radionanal Nucl Chem.2010(283):289-296
[5]夏良树,谭凯旋,王晓等.铀在榕树叶上的吸附行为及其机理分析[J].原子能科学技术,2010,44(3):278-284.
[6]Jauberty L,Gloaguena V,Astiera C.Bark,a suitable biosorbent for the removal of uranium from wastewater-From laboratory to industry[J].Radioprotection,2011,46(4):443-456.
[7]国家环境保护局.水和废水监测分析方法.第四版.北京:中国环境科学出版社,2002.406-409.
[8]郑伟娜,夏良树,王晓,谭凯旋.谷壳对铀(V1)的吸附性能及机理研究[J].原子能科学技术,2011,45(5):534-540.
[9]Harshala P,Shreeram J,Niyoti S,et al.Uranium removal from aqueous solution by coir pith;equilibrium and kinetic studies[J].Bioresource Technology,2005,96:1241-1248.
[10]Hu M Z,Norman J M,Faison N B,et al.Biosorption of uranium by Pseudomonas aeruginosa strain CSU:characterization and comparison studies[J].Biotechnol Bioeng.1996,51:237-247.
[11]杨凤,吴云海.重金属废水的生物吸附研究进展[J].环境科学与管理,2006,31(4):81-83.
[12]Kumar U,Band Y M.Sorption of cadmium from aqueous solution using pre treated rice husk[J].Bioresource Technology,2006,97(1):104-109.
[13]Guibal E,Saucedo I,Roussy J.Uptake of uranyl ions by new sorbing polymers:discussion of adsorption isotherms and pH effect[J].Reactive Polymers,1994,23(2-3):147-156.
[14]Jonathan Febrianto,Aline Natasia Kosasih,Jaka Sunarso,et al.Equilibrium and kinetic studies in adsorption of heavy metals using biosorbent;A summary of recent studies.Journal of Hazardous Materials,2009,162:616-645.
[15]Nihal B,Akman A B,Serdar K.Kinetic and equilibrium studies in removing lead ions from aqueous solutions by natural sepiolite[J].Journal of Hazardous Materials,2004,112(1-2):115-122.
[16]Tunali S,T Akar,A S 0 zcan,et al.Equilibrium and kinetics of biosorption of lead(II)from aqueous solutions by cephalosporium aphidicola[J].Separation and Purification Technology,2006,47(3):105-112.
[17]Fiol N,Villaescusa I,Martinez M,et al.Sorption of Pb(II),Ni(II),Cu(II)and Cd(II)from aqueous solution by olive stone waste[J].Separation and Purification Technology,2006,50(1):132-140.
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