Department of Chemistry, University of Saskatchewan, Saskatoon, Canada.
J Agromedicine. 2010 Apr;15(2):105-16. doi: 10.1080/10599241003618770.
Polymeric sorbent materials that incorporate beta-cyclodextrin (CD) have been prepared and their sorption behavior toward two model agrochemical contaminant compounds, p-nitrophenol (PNP) and methyl chloride examined. The sorption of PNP was studied in aqueous solution using ultraviolet-visible (UV-Vis) spectroscopy, whereas the sorption of methyl chloride from the gas phase was studied using a Langmuir adsorption method. The sorption results for PNP in solution were compared between granular activated carbon (GAC), modified GAC, CD copolymers, and CD-based mesoporous silica hybrid materials. Nitrogen porosimetry at 77 K was used to estimate the surface area and pore structure properties of the sorbent materials. The sorbents displayed variable surface areas as follows: copolymers (36.2-157 m(2)/g), CD-silica materials (307-906 m(2)/g), surface modified GAC (657 m(2)/g), and granular activated carbon (approximately 10(3) m(2)/g). The sorption capacities for PNP and methyl chloride with the different sorbents are listed in descending order as follows: GAC > copolymers > surface modified GAC > CD-silica hybrid materials. In general, the differences in the sorption properties of the sorbents were related to the following: (i) surface area of the sorbent, (ii) CD content and accessibility, (iii) and the chemical nature of the sorbent material.
已制备了包含β-环糊精 (CD) 的聚合吸附材料，并研究了其对两种模型农用化学污染物化合物对硝基苯酚 (PNP) 和甲基氯的吸附行为。使用紫外可见 (UV-Vis) 光谱法研究了 PNP 在水溶液中的吸附，而使用 Langmuir 吸附法研究了甲基氯从气相中的吸附。在溶液中比较了颗粒活性炭 (GAC)、改性 GAC、CD 共聚物和基于 CD 的介孔硅杂化材料对 PNP 的吸附结果。在 77 K 下使用氮气比表面积法估算了吸附剂材料的表面积和孔结构特性。吸附剂的比表面积不同，如下所示：共聚物 (36.2-157 m(2)/g)、CD-硅材料 (307-906 m(2)/g)、表面改性 GAC (657 m(2)/g)和颗粒活性炭 (约 10(3) m(2)/g)。列出了不同吸附剂对 PNP 和甲基氯的吸附容量，按降序排列如下：GAC > 共聚物 > 表面改性 GAC > CD-硅杂化材料。一般来说，吸附剂的吸附性能差异与以下因素有关：(i) 吸附剂的表面积，(ii) CD 含量和可及性，(iii) 吸附剂材料的化学性质。
