硼掺杂有序介孔碳增强 Pb（II）吸附：等温线和动力学建模。
Enhancement of Pb (II) adsorption by boron doped ordered mesoporous carbon: Isotherm and kinetics modeling.
机构信息
Research Center of Resource Environment and Urban Planning, Changsha University of Science and Technology, Changsha 410114, Hunan, China; School of Architecture, Changsha University of Science and Technology, Changsha 410076, Hunan, China.
Research Center of Resource Environment and Urban Planning, Changsha University of Science and Technology, Changsha 410114, Hunan, China; School of Architecture, Changsha University of Science and Technology, Changsha 410076, Hunan, China; Hunan Institute of Economics Geography, Changsha 410004, Hunan, China.
出版信息
Sci Total Environ. 2020 Mar 15;708:134918. doi: 10.1016/j.scitotenv.2019.134918. Epub 2019 Nov 1.
Boron doped ordered mesoporous carbon (BMC) was prepared to improve the adsorption of Pb(II). The effects of several parameters such as contact time, pH, and ionic strength on the adsorption by both pristine ordered mesoporous carbon (OMC) and BMC were investigated. Thermodynamic, sorption isotherm and adsorption kinetics models were used to study the adsorption mechanisms by each of the adsorbents. Based on intraparticle diffusion model, the adsorption process by the two adsorbents mainly involved the quick liquid-film diffusion stage and slow pore diffusion portion, and fitting experimental data with Temkin model indicates that the adsorption process by both of the adsorbents involve physisorption and chemisorption. Based on Langmuir model, the estimated maximum adsorption capacity for BMC was about 1.3 times higher than the pristine OMC. Moreover, BMC retained good adsorption performance in tap and lake water, and could be regenerated effectively and recycled using EDTA. The results suggested that BMC, with enhanced adsorption performance compared with OMC, could be considered as very effective and promising materials for Pb (II) removal from wastewater.
硼掺杂有序介孔碳（BMC）被制备用于提高对 Pb(II)的吸附。研究了接触时间、pH 值和离子强度等几个参数对原始有序介孔碳（OMC）和 BMC 的吸附影响。热力学、吸附等温线和吸附动力学模型被用于研究每种吸附剂的吸附机理。基于内扩散模型，两种吸附剂的吸附过程主要涉及快速的液膜扩散阶段和缓慢的孔扩散部分，且用 Temkin 模型拟合实验数据表明，两种吸附剂的吸附过程涉及物理吸附和化学吸附。基于 Langmuir 模型，估计 BMC 的最大吸附容量约为原始 OMC 的 1.3 倍。此外，BMC 在自来水和湖水中有良好的吸附性能，且可以使用 EDTA 有效再生和回收。结果表明，与 OMC 相比，BMC 具有增强的吸附性能，可被视为从废水中去除 Pb(II)的非常有效且有前景的材料。
Zotero 插件