Liu Guifang, Ma Jun, Li Xuchun, Qin Qingdong
School of Civil Engineering, Harbin Engineering University, Harbin, PR China.
J Hazard Mater. 2009 May 30;164(2-3):1275-80. doi: 10.1016/j.jhazmat.2008.09.038. Epub 2008 Sep 19.
Two commercial carbons (W20 and F20) had been selectively modified with nitric acid and thermal treatment under a flow of N(2) in present study to adsorb bisphenol A from aqueous solution. The results indicated that the experimental data were well described with pseudo-second-order kinetic model. W20 and its thermal modified sample (W20N) represented a better adsorption capacity, and the equilibrium adsorption amounts reached 382.12 and 432.34 mg/g, respectively. Further, effects of temperature, pH and ionic strength on bisphenol A adsorption onto W20 and W20N had been examined. It was found that the adsorbed amount of bisphenol A decreased with the increase of temperature from 288 to 318 K and changed little with the increase of pH from 5.0 to 9.0. At pH 11.0, the two activated carbons represented the weakest adsorption capacity. The adsorption capacities of bisphenol A onto W20 and W20N first decreased and then increased with the increasing of ionic strength.
在本研究中，两种商用碳（W20和F20）用硝酸进行了选择性改性，并在氮气气流下进行热处理，以从水溶液中吸附双酚A。结果表明，实验数据用伪二级动力学模型能很好地描述。W20及其热改性样品（W20N）表现出更好的吸附容量，平衡吸附量分别达到382.12和432.34 mg/g。此外，研究了温度、pH值和离子强度对双酚A在W20和W20N上吸附的影响。发现随着温度从288 K升高到318 K，双酚A的吸附量降低，而随着pH值从5.0升高到9.0，吸附量变化不大。在pH值为11.0时，两种活性炭的吸附容量最弱。双酚A在W20和W20N上的吸附容量随着离子强度的增加先降低后增加。
