十二烷基苯磺酸钠改性海泡石对孔雀石绿的吸附：特性表征、吸附性能及再生。
Adsorption of Malachite Green with Sodium Dodecylbenzene Sulfonate Modified Sepiolite: Characterization, Adsorption Performance and Regeneration.
机构信息
Department of Water Engineering and Science, College of Civil Engineering, Hunan University, Changsha 410082, China.
Department of Chemical Engineering, Process Engineering for Sustainable Systems (ProcESS), KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
出版信息
Int J Environ Res Public Health. 2019 Sep 7;16(18):3297. doi: 10.3390/ijerph16183297.
The adsorption of malachite green (MG) onto sodium dodecylbenzene sulfonate (SDBS)-modified sepiolite was investigated with respect to pH, oscillation rate, MG dosage and adsorbent dosage. The modification condition and modified sepiolite characterization were examined. The conditions of 100% cation exchange capacity (CEC), pH value of 9, contact time of 60 min and 25 °C were deemed as the optimal conditions. The interlayer spacing of sepiolite was expanded and the surface hydrophobicity improved due to the entering of SDBS into the interlayer structure of the sepiolite ore. This is probably the reason for its adsorption enhancement. The adsorption of malachite green by organic sepiolite is in line with the quasi-secondary kinetic model. The results from the regeneration procedure suggest that a superior regeneration property obtained with 0.2 mol/L HCl concentration.
研究了十二烷基苯磺酸钠（SDBS）改性海泡石对孔雀石绿（MG）的吸附作用，考察了 pH 值、振荡速率、MG 用量和吸附剂用量等因素。考察了改性条件和改性海泡石的表征。当阳离子交换容量（CEC）为 100%、pH 值为 9、接触时间为 60min 和 25°C 时，被认为是最佳条件。SDBS 进入海泡石矿石的层间结构，导致其层间距扩大，表面疏水性提高，这可能是其吸附增强的原因。有机海泡石对孔雀石绿的吸附符合准二级动力学模型。再生程序的结果表明，在 0.2mol/L HCl 浓度下可获得较好的再生性能。
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