Admicelle-air bubble flotation system for rapid and efficient removal of environmental pollutants from waste water

用荧光法评价了动态吸附在氧化铝表面（即胶束）的表面活性剂聚集体的微观溶剂性质。从发射波长与所选溶剂极性的关系来看，十二烷基硫酸钠/氧化铝胶束的疏水性大于普通胶束。它相当于1-辛醇或乙酸乙酯。对氯酚、烷基酚、多芳烃、烷基化锡、甲醛、农药等多种环境污染物进行了快速有效的吸附。掺入程度与表征化合物疏水性的水-辛醇分布系数相关。高度疏水性，因此生物蓄积性化合物被有效地结合并高度浓缩到胶束介质中。由于具有较高的润湿性和渗透性，掺入速度快，效率高。胶束在处理大体积样品时也很有用。具有正zeta电位的氧化铝吸附阴离子表面活性剂SDS分子后成为带负电的粒子。在SDS的适度吸附下，氧化铝颗粒通过鼓泡法定量地浮在溶液表面。这表明可以简单快速地恢复胶束。浮选在15秒内完成，颗粒在水面上保留了几分钟。所提出的ad胶束-气泡浮选体系具有很高的潜力，该体系可将不同的疏水有毒化合物成功地收集在ad胶束中，并通过浮选将其快速从散装溶液中分离出来。

A microscopic solvent property of surfactant aggregates dynamically sorbed on alumina surfaces (i.e., admicelles) was evaluated by the fluorometric method. From the relationship of emission wavelength and polarity of the selected solvent, sodium dodecylsulfate/alumina admicelles have the hydrophobicity larger than normal micelles. It corresponded to 1-octanol or ethylacetate. Many environmental pollutants including chlorophenols, alkylphenols, polyaromatic hydrocarbons, alkylated tin, formaldehyde, and pesticides were rapidly and effectively collected in the admicelles. The extent of the incorporation was correlated with the aqueous-octanol distribution coefficient, which represents the hydrophobicity of the compound. Highly hydrophobic, hence bio-accumulative compounds were efficiently incorporated and highly concentrated into the admicellar media. The incorporation was quite rapid and efficient because of higher wettability and permeability. Admicelles are also useful for the treatment of large volume samples. Alumina having positive zeta potential became negatively charged particles, when they sorbed anionic surfactant SDS molecules. In the moderate SDS sorption, the alumina particles were quantitatively floated on the solution surface by bubbling. This indicates the possibility of simple and rapid recovery of admicelles. Flotation was achieved within 15 s and the particles were retained on the water surface for several minutes. The proposed admicelle-air bubble flotation system has the high potential, in which different hydrophobic toxic compounds are successfully collected in admicelles and then rapidly separated from the bulk solutions by flotation.