Study on adsorption properties of water hyacinth-derived biochar for uranium (VI)

Study on adsorption properties of water hyacinth-derived biochar for uranium (VI)
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水葫芦生物炭对铀(VI)的吸附性能研究

DOI:
10.1007/s10967-020-07160-2
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发表时间:
2020-04
影响因子:
1.6
通讯作者:
Shuheng Hu
Shuheng Hu
中科院分区:
化学4区
文献类型:
--
作者:
Zimu Xu;Yexin Xing;Anran Ren;Doudou Ma;Yunxia Li;Shuheng Hu

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研究了水葫芦衍生生物炭对铀(VI)的吸附性能。用扫描电子显微镜、X射线衍射仪、X射线光电子能谱、傅立叶变换红外光谱和比表面积法对样品进行了表征。生物炭表面的官能团可以与U(VI)发生络合作用。通过静态批量实验研究了吸附剂量、温度、接触时间、溶液pH和离子强度等因素对吸附效果的影响。结果表明,吸附符合准二级动力学方程和Langmuir模型。溶液pH值对U(VI)的吸附有较大影响,而离子强度对吸附影响不大。
The adsorption capacity of the water hyacinth-derived biochar on U(VI) was investigated in this study. The as-prepared sample was characterized by methods of SEM, XRD, XPS, FT-IR and BET. Functional groups on the biochar surface could undergo complexation with U(VI). Effects of adsorption dose, temperature, contact time, solution pH and ionic strength were studied by static batch experiments. Results show that the adsorption could be better fitted by the pseudo-second-order kinetic equation and Langmuir model. The solution pH has a great impact on the U(VI) adsorption, while the ionic strength exerts no significant effect.
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