Yan Liang, Lv Di, Huang Xinwen, Shi Huixiang, Zhang Geshan
Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China; Department of Municipal and Environmental Engineering, Institute of Environment and Ecology, Powerchina Huadong Engineering Corporation Limited, Hangzhou, Zhejiang, 310014, China.
Department of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
Water Sci Technol. 2016 Oct;74(7):1744-1751. doi: 10.2166/wst.2016.325.
The adsorption behavior of pharmaceuticals and personal care product, Bisphenol-A (BPA), according to four coal-based and four wood-based granular activated carbons modified using outgassing treatment, acidic treatment or alkaline treatment was studied. The adsorption isotherm results indicated that carbon surface acidity played a very important role in the adsorption of BPA. It was found that increasing surface acidity would increase the hydrogen bonding effects and increase adsorption of BPA on activated carbon. The acidic modified sample (F600-A and OLC-A) represented the best adsorption capacity, and the equilibrium adsorption amounts reached 346.42 and 338.55 mg/g, respectively. Further, effects of surface charge and surface basicity were examined. It was found that the adsorbed amount of BPA decreased with the increase of surface charge. Finally, there appeared to be a significant oligomerization phenomenon with BPA molecules onto the surface of activated carbon. OLC and OLC-OG, which have higher micropore percentages, are very effective in hampering the oligomerization of BPA under oxic conditions.
研究了经脱气处理、酸性处理或碱性处理改性的四种煤基和四种木质颗粒活性炭对药物及个人护理用品双酚A（BPA）的吸附行为。吸附等温线结果表明，碳表面酸度在BPA的吸附过程中起着非常重要的作用。研究发现，增加表面酸度会增强氢键作用，提高BPA在活性炭上的吸附量。酸性改性样品（F600 - A和OLC - A）表现出最佳吸附容量，平衡吸附量分别达到346.42和338.55 mg/g。此外，还考察了表面电荷和表面碱度的影响。结果发现，BPA的吸附量随表面电荷的增加而降低。最后，BPA分子在活性炭表面似乎出现了显著的低聚现象。具有较高微孔百分比的OLC和OLC - OG在有氧条件下对阻碍BPA的低聚非常有效。
