摘要
本研究考察了两种药物磺胺甲恶唑(SMX)和卡马西平(CBZ)在活性炭(AC)、单壁碳纳米管(SC)和氧化石墨烯(GO)上的单一吸附、共吸附和竞争吸持动力学特性,用拟一级动力学(PFOM)和修正后的拟二级动力学(PSOM)两种模型对实验数据进行了拟合。研究结果表明,单一吸附体系中SMX和CBZ在3种吸附剂上的吸附速率为GO>AC>SC,吸附速率与吸附剂的形貌和表面性质有关;与SMX相比,CBZ由于具有强疏水作用和较强的π-π作用而具有更高的竞争吸附能力;在两种竞争体系中,SMX和CBZ在碳基材料上的吸附速率和吸附容量都会有所降低,竞争物质在吸附剂上形成的空间位阻是造成吸附速率降低的主要原因。
In this study,the single adsorption,co-adsorption and sequential competitive adsorption kinetics of sulfamethoxazole(SMX)and carbamazepine(CBZ)on activated carbon(AC),single-wall carbon nanotubes(SC)and Graphene Oxide(GO)were investigated.Pseudo-first-order(PFOM)and Pseudo-second-order(PSOM)models were used to fit the experimental date.The results showed that the adsorption rate of SMX and CBZ on the three adsorbents was GO>AC>SC in a single adsorption system,and the adsorption rate was related to the morphology and surface properties of the adsorbent.Compared with SMX,CBZ had higher competitive adsorption capacity due to its strong hydrophobicity andπ-πEDA interaction.In the two competitive systems,the adsorption rate and adsorption capacity of SMX and CBZ on carbon-based materials were both reduced,and the steric hindrance formed by the competing substances on the adsorbent was the main reason for the decrease of the adsorption rate.
作者
王远珍
何硕
王驰
WANG Yuanzhen;HE Shuo;WANG Chi(Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming,650500,China;Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials,Kunming University of Science and Technology,Kunming,650500,China;The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province,Kunming University of Science and Technology,Kunming,650500,China)
出处
《环境化学》
CAS
CSCD
北大核心
2021年第8期2576-2585,共10页
Environmental Chemistry
基金
国家自然科学基金青年基金(41807373)资助.
关键词
碳基吸附材料
PPCPS
竞争吸附
竞争吸持
动力学
carbon-based materials
PPCPs
competitive adsorption
competitive holding
adsorption kinetics
