Functionalized cotton via surface-initiated atom transfer radical polymerization for enhanced sorption of Cu(II) and Pb(II).
Functionalized cotton via surface-initiated atom transfer radical polymerization for enhanced sorption of Cu(II) and Pb(II).
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DOI：
10.1016/j.jhazmat.2011.06.054
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发表时间：
2011-09
影响因子：
13.6
通讯作者：
Y. Zheng;S. Deng;L. Niu;F. Xu;M. Chai;Gang Yu
中科院分区：
文献类型：
--
作者：
Y. Zheng;S. Deng;L. Niu;F. Xu;M. Chai;Gang Yu
本研究采用表面引发原子转移自由基聚合（ATRP）成功制备了胺化棉和聚丙烯酸钠（P（AA-Na））接枝棉，用于有效去除水溶液中的Cu（II）和Pb（II）。采用扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）对改性棉表面进行了表征。棉纤维表面接枝高密度胺基和羧基的长链聚合物，增强了棉纤维对重金属的吸附。研究了吸附动力学、吸附等温线和pH效应。Cu（II）和Pb（II）在P（AA-Na）接枝棉上的吸附在1h内达到平衡，比在氨基化棉上的吸附8h快得多。根据Langmuir拟合，P（AA-Na）接枝棉对Cu（II）和Pb（II）的最大吸附容量分别为2.45和2.44mmol/g，高于文献报道的吸附剂。P（AA-Na）接枝棉对Cu（II）和Pb（II）的吸附性能优于胺化棉。
The surface-initiated atom transfer radical polymerization (ATRP) was used to successfully prepare the aminated cotton and polyacrylic acid sodium (P(AA-Na))-grafted cotton for the efficient removal of Cu(II) and Pb(II) from aqueous solution in this study. The modified cotton surfaces were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS). The grafted long polymers with high density of amine and carboxyl groups on the cotton surfaces were responsible for the enhanced adsorption of heavy metals. The sorption behaviors including sorption kinetics, isotherms and pH effect were investigated. The sorption equilibrium of Cu(II) and Pb(II) was achieved within 1h on the P(AA-Na)-grafted cotton, much faster than 8h on the aminated cotton. According to the Langmuir fitting, the maximum sorption capacities of Cu(II) and Pb(II) on the P(AA-Na)-grafted cotton were 2.45 and 2.44mmol/g, respectively, higher than many adsorbents reported in the literature. The P(AA-Na)-grafted cotton had better adsorption behaviors for Cu(II) and Pb(II) than the aminated cotton.