The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Water Sci Technol. 2012;66(9):1849-55. doi: 10.2166/wst.2012.383.
The removal of the mercaptan, 1-methyl-1-propanethiol, from aqueous solutions using a non-porous, electrically conducting carbon-based adsorbent (Nyex 1000) was investigated. The adsorption process was found to be rapid (equilibrium capacity achieved within 5 minutes) with low adsorptive capacity (of the order of 0.4 mg g(-1)) when compared with activated carbon. Electrochemical regeneration of the Nyex 1000 in a simple divided electrochemical cell within a sequential batch treatment unit restored 100% of the adsorbent's adsorptive capacity using treatment times as low as 20 minutes by passing a current of 0.5 A. The sorptive characteristics of a Nyex-water slurry were also modelled and investigated both in a bubble column and in a continuous adsorption-regeneration treatment system. It was demonstrated that the continuous removal-destruction system could achieve a step reduction in challenge gas concentration of approximately 75% for a period of 35 minutes with a current of 5 Amps. This was attributed to mass transfer enhanced by a combination of adsorption and chemical reaction with free chlorine species generated in the electrochemical process.
使用一种无孔、导电的基于碳的吸附剂（Nyex 1000）从水溶液中去除巯基化合物 1-甲基-1-丙硫醇的研究。与活性炭相比，该吸附过程非常迅速（在 5 分钟内达到平衡容量），吸附容量较低（约为 0.4mg g(-1)）。在一个简单的分极电化学电池中，通过施加 0.5A 的电流，在连续批处理单元中对 Nyex 1000 进行电化学再生，可在低至 20 分钟的处理时间内恢复 100%的吸附剂吸附容量。Nyex-水浆料的吸附特性也在鼓泡柱和连续吸附-再生处理系统中进行了模拟和研究。结果表明，连续去除-破坏系统在 35 分钟内以 5A 的电流可以将挑战性气体浓度降低约 75%。这归因于通过吸附和与电化学过程中生成的自由氯物种的化学反应的组合增强的传质。
