Role of non-ion surfactants in three-dimensional ordered porous biomass carbon foam derived from the liquefied eucalyptus sawdust for metronidazole adsorption
Role of non-ion surfactants in three-dimensional ordered porous biomass carbon foam derived from the liquefied eucalyptus sawdust for metronidazole adsorption
复制标题
非离子表面活性剂在液化桉木锯末三维有序多孔生物质碳泡沫中对甲硝唑吸附的作用
DOI：
10.1002/jctb.5663
复制
发表时间：
2018
影响因子：
3.4
通讯作者：
Bai Xue
中科院分区：
文献类型：
--
作者：
Hua Zulin;Wan Shungang;Sun Lei;Yu Zebin;Bai Xue
以桉树木屑为原料，以聚乙二醇2000(PEG2000)、Pluronic®P-123和Pluronic®F-127为结构导向剂，制备了三维有序蜂窝状结构生物质碳泡沫(BCF)。阐明了不同表面活性剂对BCFs的形貌和孔结构的影响，以及BCFs对甲硝唑的吸附性能和吸附机理。甲硝唑的吸附过程为自发吸热过程，符合准二级动力学模型。甲硝唑在BCF-PEG和BCF-F127上的吸附符合Langmuir等温式，而在BCF-P123上的吸附符合Freundlich等温式。最大吸附容量分别为56.40、67.52和42.92 mg g−1。甲硝唑在BCFPEG123和BCFP123上的吸附机理主要是氢键、π-π相互作用和孔填充。氢键和π-π相互作用是甲硝唑在BCFF127上吸附的主要原因。结论表面活性剂的种类对BCFs的物理化学性质有显著的影响，并对BCFs的吸附特性起着重要的控制作用。此外，定形生物滤料可作为一种高效、易回收、有前景的吸附剂用于废水中污染物的去除。2018年中国化学工业学会
BACKGROUNDThree‐dimensional ordered honeycomb‐like structured biomass carbon foams (BCFs) were prepared from eucalyptus sawdust using polyethylene glycol 2000 (PEG), Pluronic® P‐123 and Pluronic® F‐127 as structure‐directing agents. The effect of different surfactants on the morphology and pore structure of BCFs, and the adsorption performance and mechanisms of metronidazole onto BCFs was clarified.RESULTSThe physicochemical characteristics of BCFs depend on the surfactant molecular structure. The adsorption process of metronidazole was spontaneous and endothermic in nature and followed a pseudo‐second‐order kinetic model. Metronidazole adsorption onto BCF‐PEG and BCF‐F127 followed the Langmuir isotherm, whereas that onto BCF‐P123 followed the Freundlich isotherm. The maximum adsorption capacities for BCF‐PEG, BCF‐P123 and BCF‐F127 were 56.40, 67.52 and 42.92 mg g−1, respectively. The adsorption mechanisms of metronidazole onto BCF‐PEG and BCF‐P123 were mainly hydrogen bonding, π‐π interactions and pore filling. Hydrogen bonding and π–π interactions were mainly responsible for adsorption of metronidazole onto BCF‐F127.CONCLUSIONAll results demonstrated that types of surfactant significantly affected the BCFs' physicochemical properties, and played an important role in controlling the adsorption characteristics of metronidazole onto BCFs. In addition, shaped BCF can be utilized as an effective, easily recovered and promising adsorbent for the removal of pollutants in wastewater. © 2018 Society of Chemical Industry