Institute of Chemical Industry of Forest Products, CAF, Nanjing 210042, Jiangsu Province, China; National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China; Key and Open Lab. on Forest Chemical Engineering, SFA, Nanjing 210042, Jiangsu Province, China; Key Lab. of Biomass Energy and Material, Nanjing 210042, Jiangsu Province, China.
Institute of Chemical Industry of Forest Products, CAF, Nanjing 210042, Jiangsu Province, China; National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China; Key and Open Lab. on Forest Chemical Engineering, SFA, Nanjing 210042, Jiangsu Province, China; Key Lab. of Biomass Energy and Material, Nanjing 210042, Jiangsu Province, China.
Mar Pollut Bull. 2014 Jan 15;78(1-2):69-76. doi: 10.1016/j.marpolbul.2013.11.007. Epub 2013 Nov 26.
Reactivation and chemical modification were used to obtain modified activated carbons with different pore structure and surface chemical properties. The samples were characterized by nitrogen absorption-desorption, Fourier transform infrared spectroscopy and the Bothem method. Using mercury chloride as the target pollutant, the Hg(2+) adsorption ability of samples was investigated. The results show that the Hg(2+) adsorption capacity of samples increased significantly with increases in micropores and acidic functional groups and that the adsorption process was exothermic. Different models and thermodynamic parameters were evaluated to establish the mechanisms. It was concluded that the adsorption occurred through a monolayer mechanism by a two-speed process involving both rapid adsorption and slow adsorption. The adsorption rate was determined by chemical reaction.
采用再生和化学改性的方法，得到了具有不同孔结构和表面化学性质的改性活性炭。通过氮气吸附-脱附、傅里叶变换红外光谱和 Bothem 法对样品进行了表征。以氯化汞为目标污染物，考察了样品对 Hg(2+)的吸附能力。结果表明，随着微孔和酸性官能团的增加，样品对 Hg(2+)的吸附容量显著增加，吸附过程为放热过程。采用不同的模型和热力学参数进行了评价，建立了相应的吸附机制。研究结果表明，吸附过程是通过单分子层机制，由快速吸附和缓慢吸附两个速度过程共同作用完成的。吸附速率由化学反应决定。
