The inclusion complexation capabilities of cyclodextrins permit them to mediate the adsorption of hydrophobic molecules. Though often associated with pharmaceutical formulations these properties afford a capacity for the extraction of appropriate hydrophobic guest molecules within industrial processes, such as water reclamation from frother contamination within mineral flotation circuits. Industrially applied flotation frothers largely comprise of a mixture of aliphatic alcohols, many of which are known to form stable inclusion complexes with beta-cyclodextrin (β-CD). Cross-linking of β-CD with epichlorohydrin through an emulsion polymerization process, afforded water-insoluble β–CD polymer particles as an effective adsorbent material for frother sequestration. Herein the capacity of these particles to adsorb frother molecules from aqueous solutions is presented. The composition of the industrially relevant frother Interfloat™ F326N, used predominantly for copper-sulfide ore flotation, was firstly elucidated using gas chromatography mass spectrometry. These identified components were then shown to be adsorbed by the β-CD polymer particles, demonstrating the successful sequestration of specific frother molecules from aqueous solution. The results of this study indicate that filtration media based on water-insoluble β-CD polymer particles may provide a viable means of removing frother contamination from recycled process waters. Further, this filtration media may find use in other water purification applications where contamination with organic molecules is of concern.

中文翻译：

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用于吸附选矿水回收浮选起泡剂的交联 β-环糊精聚合物


环糊精的包合络合能力使其能够介导疏水性分子的吸附。尽管这些特性通常与药物制剂相关，但它们能够在工业过程中提取适当的疏水性客体分子，例如从矿物浮选回路中的泡沫污染中回收水。工业应用的浮选起泡剂主要由脂肪醇的混合物组成，其中许多脂肪醇可与 β-环糊精 (β-CD) 形成稳定的包合物。通过乳液聚合工艺将 β-CD 与环氧氯丙烷交联，得到不溶于水的 β-CD 聚合物颗粒，作为起泡剂封存的有效吸附剂材料。本文介绍了这些颗粒从水溶液中吸附起泡剂分子的能力。首先使用气相色谱质谱法阐明了主要用于硫化铜矿石浮选的工业相关起泡剂 Interfloat™ F326N 的成分。然后，这些鉴定出的成分被 β-CD 聚合物颗粒吸附，证明了特定起泡剂分子从水溶液中的成功螯合。这项研究的结果表明，基于水不溶性 β-CD 聚合物颗粒的过滤介质可以提供一种去除循环工艺水中泡沫污染的可行方法。此外，这种过滤介质还可用于其他需要关注有机分子污染的水净化应用。