负载β-环糊精的矿物和生物炭对甲基橙的吸附性能

采用HCl溶液对沸石（F0）、蛭石（ZH0）、秸秆（J0）和棕榈生物炭（Z0）进行活化预处理,以环氧氯丙烷为交联剂,将β-环糊精（β-CD）负载到原始材料上,制备了4种新型吸附材料F2、ZH2、J2和Z2。采用FTIR、元素分析、SEM和TG等技术对吸附材料进行了表征,探讨了其对甲基橙的吸附性能。表征结果显示,β-CD被成功地负载到沸石、蛭石、秸秆生物炭和棕榈生物炭上。吸附实验结果表明：负载β-CD后的4种材料对甲基橙的平衡吸附量大小顺序为J2> F2> ZH2> Z2;溶液pH和吸附温度的提高可有效提升4种材料对甲基橙的吸附能力。吸附动力学和热力学研究表明,4种材料对甲基橙的吸附过程中物理吸附起着主导作用,且更趋向于单分子层吸附。4种材料均具有良好的重复使用性能。

Adsorption capabilities of β-cyclodextrin loaded mineral and biochar to methyl orange

Zeolite （F0）,vermiculite （ZH0）,straw （J0） and palm biochar （Z0） were pretreated by activation with HCl solution,and then 4 new adsorption materials F2,ZH2,J2 and Z2 were prepared by loading β-cyclodextrin （β-CD） on these original materialsusing epichlorohydrin as cross-linking agent. The adsorption materials were characterized by FTIR,elemental analysis,SEM and TG,and their adsorption capabilities to methyl orange were discussed. The characterization results show that β-CD is successfully loaded on F0,ZH0,J0 and Z0. The adsorption experiment results show that the order of the equilibrium absorption capacity to methyl orange by the 4 materials is J2>F2>ZH2>Z2;The increase of solution pH and adsorption temperature can effectively improve the adsorption capacities of the 4 materials to methyl orange. Study results on adsorption kinetics and thermodynamics show that the physical adsorption plays a leading role in the methyl orange adsorption process and tends to be monolayer adsorption. All the 4 materials has good reuse performance.