化工学报2015，Vol.66Issue(12)：4874-4882,9.DOI:10.11949/j.issn.0438-1157.20150056
活性炭纤维吸附石化废水中苯酚的吸附平衡及动力学
Equilibrium and kinetics of phenol adsorption from petrochemical wastewater with activated carbon fiber
摘要
Abstract
Activated carbon fiber (ACF) was used for the adsorption of phenol in petrochemical wastewater. Adsorption isotherms at 25, 40, 55 and 65℃ were determined and fitted with Langmuir, Freundlich and Redlich-Peterson equations. The results show that the adsorption equilibrium data fit Langmuir and Redlich- Peterson equations better than the Freundlich equation. The phenol adsorption ability of ACF from simulated wastewater decreases with the increase of temperature, while the situation is somewhat different with petrochemical wastewater. The adsorption kinetic data fit the pseudo-second-order kinetic model well in petrochemical wastewater and simulated wastewater. The intra-particle diffusion is the main rate-controlling step in the initial period andkid of phenol adsorption increases with temperature in petrochemical wastewater. The adsorption rate is influenced by intra-particle diffusion and external diffusion in the middle and later period. Thermodynamic analysis shows that theΔG value is negative, indicating that the adsorption of phenol in petrochemical wastewater by ACF is spontaneous. However,ΔG does not change obviously with temperature owing to the influence of oil on phenol adsorption in petrochemical wastewater.关键词
吸附/活性炭纤维/苯酚/废水/动力学Key words
adsorption/activated carbon fiber/phenol/wastewater/kinetics分类
化学化工引用本文复制引用
孔黎明,张婷,王佩德,周祥,贾哲华..活性炭纤维吸附石化废水中苯酚的吸附平衡及动力学[J].化工学报,2015,66(12):4874-4882,9.基金项目
国家自然科学基金项目(21106125) （21106125）
扬州市科技计划项目(2012038-7). supported by the National Natural Science Foundation of China (21106125) and the Science and Technology Plan Projects of Yangzhou (2012038-7). （2012038-7）
