摘要
为减少染料废水的排放造成的环境污染,分别采用溶剂热法和机械搅拌法制备了金属有机骨架材料UiO-66和羧基改性材料UiO-66-(COOH)_(2),研究了两种吸附剂对有机染料亚甲基蓝(MB)的吸附性能,并探讨了相应的吸附机理。结果表明:UiO-66和UiO-66-(COOH)_(2)对MB均具有较好的吸附能力,UiO-66-(COOH)_(2)对MB的平衡吸附量达416.95 mg/g,比UiO-66材料提高了38.6%。UiO-66-(COOH)_(2)对MB的高效吸附是静电相互作用、π-π相互作用和氢键作用等多重机制共同作用的结果。吸附过程符合拟二级动力学模型,吸附平衡符合Freundlich吸附模型。
To reduce the environmental pollution caused by the discharge of dye wastewater,the metal-organic framework materials UiO-66 and carboxyl modified material UiO-66-(COOH)_(2) were prepared by solvothermal and mechanical stirring methods,respectively.The adsorption properties of the two adsorbents for the organic dye methylene blue(MB)were investigated,and their adsorption mechanisms were studied.The results show that both UiO-66 and UiO-66-(COOH)_(2) have good adsorption capacity for MB,and the equilibrium adsorption capacity of UiO-66-(COOH)_(2) for MB reaches 416.95 mg/g,which is 38.6%higher than that of UiO-66.The highly-efficient adsorption of MB by UiO-66-(COOH)_(2) is because of multiple interactions such as electrostatic interaction,π-πinteraction and hydrogen bonding.The adsorption processes conform to the pseudo-second-order kinetic model,and the adsorption equilibrium is described by the Freundlich adsorption model.
作者
王洪婷
罗时万
郭志伟
张蓉
杨犁
覃远航
WANG Hongting;LUO Shiwan;GUO Zhiwei;ZHANG Rong;YANG Li;QIN Yuanhang(School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Key Laboratory of Green Chemical Engineering Process(Wuhan Institute of Technology),Ministry of Education,Hubei key Laboratory of Novel Reactor and Green Chemical Technology(Wuhan Institute of Technology),Wuhan 430205,China)
出处
《武汉工程大学学报》
CAS
2023年第2期139-147,共9页
Journal of Wuhan Institute of Technology
基金
绿色化工过程教育部重点实验室创新基金(GCX202111)。
