Highly efficient sorption of perfluorooctane sulfonate and perfluorooctanoate on a quaternized cotton prepared by atom transfer radical polymerization
Highly efficient sorption of perfluorooctane sulfonate and perfluorooctanoate on a quaternized cotton prepared by atom transfer radical polymerization
复制标题
原子转移自由基聚合季化棉高效吸附全氟辛烷磺酸和全氟辛酸
DOI：
10.1016/j.cej.2012.04.005
复制
发表时间：
2012-06-15
影响因子：
15.1
通讯作者：
Yu, Gang
中科院分区：
文献类型：
--
作者：
Deng, Shubo;Zheng, Y. Q.;Yu, Gang
废水中全氟辛烷磺酸（PFOS）和全氟辛酸（PFOA）的去除近年来引起了人们的极大关注。本研究采用表面引发原子转移自由基聚合法（ATRP）制备了季铵化棉，对水溶液中的PFOS和PFOA进行了高效去除。通过扫描电子显微镜（SEM）证实了长聚合物刷在棉花表面的成功接枝。傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）。XPS分析表明，接枝到棉花表面的长链聚合物上的高密度季铵阳离子是增强PFOS和PFOA吸附的原因。这种新型季铵化棉对PFOS和PFOA具有快速吸附和高吸附容量。PFOA和PFOS在季铵化棉上的吸附平衡时间分别为4 h和12 h，远快于多孔吸附剂。在pH 5.0时，季铵化棉对PFOS和PFOA的最大吸附容量分别为3.3和3.1 mmol/g。pH值在3.0-10.0范围内对吸附效果影响不大。这种季铵化棉在去除废水中的全氟化合物方面具有很好的应用前景。(C)2012爱思唯尔有限公司版权所有。
Removal of perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) from wastewater has caused great attention in recent years. In this study, quaternized cotton highly effective for the removal of PFOS and PFOA from aqueous solution was prepared by surface-initiated atom transfer radical polymerization (ATRP). The successful graft of long polymer brushes on the cotton surfaces was verified by scanning electron microscopy (SEM). Fourier transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS). XPS analysis indicated that the high density of quaternary ammonium cations on the long polymers grafted onto the cotton surface were responsible for the enhanced sorption of PFOS and PFOA. This novel quaternized cotton exhibited fast sorption and high sorption capacity for PFOS and PFOA. The sorption equilibrium of PFOA and PFOS on quaternized cotton was achieved at 4 h and 12 h, respectively, much faster than that on the porous adsorbents reported. The obtained maximum sorption capacities of PFOS and PFOA on quaternized cotton at pH 5.0 were 3.3 and 3.1 mmol/g, respectively. Additionally, solution pH in the range of 3.0-10.0 had little effect on their high sorption. This quaternized cotton has promising application for the removal of perfluorinated compounds from wastewater. (C) 2012 Elsevier B.V. All rights reserved.