School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China.
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
Carbohydr Polym. 2020 Dec 15;250:117003. doi: 10.1016/j.carbpol.2020.117003. Epub 2020 Aug 29.
Herein, β-cyclodextrin (β-CD) functionalized rice husk-derived biochar (BC) was conveniently and fast synthesized via microwave (MW)-assisted one pot process, and employed for simultaneous elimination of bisphenol A (BPA) and plumbum (Pb). Profiting by microwave irradiation, the surface modification was implemented in 15 min and the prepared BC-β-CD presented an excellent adsorption performance with a heterogeneous adsorption capacity of 209.20 mg/g for BPA and a theoretical monolayer uptake of 240.13 mg/g for Pb(II) in the mono-component system. Furthermore, the BC-β-CD could simultaneously achieve efficient cleanup of BPA and Pb(II) through avoiding the competitive behaviors between them, which were due to the different adsorption mechanisms for Pb(II) (i.e. electrostatic attraction and complexation) and BPA (i.e. host-guest supramolecular and π-π interactions). Moreover, the adsorbed BPA and Pb(II) could be sequentially desorbed with mild decrease in the adsorption performance of BC-β-CD even after five cycles in the Pb(II)-BPA multi-component system.
在此，通过微波（MW）辅助一锅法方便、快速地合成了β-环糊精（β-CD）功能化的稻壳衍生生物炭（BC），并将其用于同时去除双酚 A（BPA）和铅（Pb）。利用微波辐射，在 15 分钟内完成了表面改性，制备的 BC-β-CD 表现出优异的吸附性能，在单一组分体系中对 BPA 的非均相吸附容量为 209.20mg/g，对 Pb(II)的理论单层吸附量为 240.13mg/g。此外，BC-β-CD 可以通过避免它们之间的竞争行为来同时实现 BPA 和 Pb(II)的有效清除，这是由于 Pb(II)（即静电吸引和络合）和 BPA（即主体-客体超分子和π-π相互作用）的吸附机制不同。此外，即使在 Pb(II)-BPA 多组分体系中经过五次循环，吸附性能略有下降，吸附在 BC-β-CD 上的 BPA 和 Pb(II)仍可顺序解吸。
