椰壳活性炭对水溶液中铀(VI)的吸附研究
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摘要
以椰壳为原料制得活性炭C-1,采用KOH电镜、粉末衍射仪等仪器对C-1和C-2进行表征。结果表明,C-2含有较多的含氧官能团,会形成新的孔隙;以铀(VI)溶液为研究目标,C-1对铀的吸附量为3.01mg/g,C-2对铀的吸附容量为3.62mg/g,Lagergren准二级动力学方程和Langmuir吸附等温式能很好的描述C-1和C-2对铀(VI)的吸附。
Activated carbon C-1 was prepared from coconut shell,and activated carbon C-2 was obtained by modification of C-1 by KOH activation method.The characterization methods adopted by C-1 and C-2 are mainly through infrared analyzer,scanning electron microscope,powder diffractometer and other instruments.The results show that C-2 contains more oxygen-containing functional groups and forms new pores.Taking uranium(VI)solution as the research target,the adsorption capacity of C-1 for uranium is 3.01mg/g,and the adsorption capacity of C-2 for uranium is 3.62mg/g.The Lagergren quasi-second-order kinetic equation and the Langmuir adsorption isotherm can better describe the adsorption of uranium(VI)by C-1 and C-2.
Activated carbon C-1 was prepared from coconut shell,and activated carbon C-2 was obtained by modification of C-1 by KOH activation method.The characterization methods adopted by C-1 and C-2 are mainly through infrared analyzer,scanning electron microscope,powder diffractometer and other instruments.The results show that C-2 contains more oxygen-containing functional groups and forms new pores.Taking uranium(VI)solution as the research target,the adsorption capacity of C-1 for uranium is 3.01mg/g,and the adsorption capacity of C-2 for uranium is 3.62mg/g.The Lagergren quasi-second-order kinetic equation and the Langmuir adsorption isotherm can better describe the adsorption of uranium(VI)by C-1 and C-2.
引文
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[2]高廷耀,顾国维.水污染控制工程下册(第二版)[M].北京:高等教育出版社,1999.
[3]魏广芝,徐乐昌.低浓度含铀废水的处理技术及其研究进展[J].铀矿冶,2007,26(2):90.
[4]王国栋,邓先伦,朱光真,等.KOH活化高比表面积椰壳活性炭的制备及其性质研究[J].林产化学与工业,2013.33(02):108-112.
[5]Dong W,Brooks S C.Determination of the formation constants of ternary complexes of uranyl and carbonate with alkaline earth metals(Mg2+,Ca2+,Sr2+,and Ba2+)using anion exchange method[J].Environmental science&technology,2006,40(15):4689-4695.
[6]Majdan M,Pikus S,Gajowiak A,et al.Characterization of uranium(VI)sorption by organ bentonite[J].Applied Surface Science,2010,256:5416-5421.
[7]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,2010,03:278-284.
[8]魏春梅,王晨丽,谷晋川,等.改性活性炭对水中Cr~(6+)的吸附热力学研究[J].离子交换与吸附,2014,02:143-148.
[9]Lo S F,Wang S Y,Tsai M J,et al.Adsorption capacity and removal efficiency of heavy metal ions by Moso and Ma bamboo activated carbons[J].Chemical Engineering Research and Design,2012,90(9):1397-1406.
[10]吴建波.铀的吸附材料研究进展[J].山东化工,2015,06:54-56.