Removal of organic contaminants from water using nanosponge cyclodextrin polyurethanes
Removal of organic contaminants from water using nanosponge cyclodextrin polyurethanes
复制标题
DOI：
10.1002/jctb.1681
复制
发表时间：
2007-04-01
影响因子：
3.4
通讯作者：
Malefetse, Tshepo J.
中科院分区：
文献类型：
--
作者：
Mhlanga, Sabelo D.;Marnba, Bhekie B.;Malefetse, Tshepo J.
采用双功能异氰酸酯连接剂合成了不溶性纳米多孔环糊精（CD）聚合物。研究了这些聚合物去除水中不同浓度的选定有机污染物的能力。研究的污染物选择了高优先级氯化消毒副产物（DBPs）和水中常见的致臭化合物2-甲基异龙脑（2-MIB）。2-MIB和土臭素在水中散发的令人不快的霉味即使在ng -1（万亿分之一）的水平上也能被人的鼻子探测到。采用固相萃取（SPE）对含低水平污染物的水样进行预浓缩和萃取，随后采用气相色谱-质谱（GC/MS）进行定量。在这里，我们表明CD聚合物对有机污染物的吸收效率（>99%），大大优于颗粒活性炭（GAC）。还报道了这些CD聚合物的可回收利用率。(c) 2007年化学工业学会。
Insoluble nanoporous cyclodextrin (CD) polymers were synthesized using bifunctional isocyanate linkers. The ability of these polymers to remove selected organic pollutants from water at varying concentrations was studied. The investigated pollutants were selected high-priority chlorinated disinfection by-products (DBPs) and a common odour-causing compound in water, 2-methylisoborneol (2-MIB). The unpleasant musty odour imparted by 2-MIB and geosmin in water can be detected by the human nose even at ng L-1 (parts per trillion) levels. Pre-concentration and extraction of water samples containing low levels of pollutants was performed using solid phase extraction (SPE) and subsequently quantified by gas chromatography-mass spectrometry (GC/MS). Here we show that the CD polymers demonstrate excellent absorption efficiency (>99%) with respect to the organic pollutants, considerably better than granular activated carbon (GAC). The recyclability efficiency of these CD polymers is also reported. (c) 2007 Society of Chemical Industry.