改性MXene材料对亚甲基蓝废水的吸附性能研究  

Study on the Adsorption Performance of Modified MXene Material on Methylene blue Wastewater

作　　者：康悦琦 陈桉文 朱奇珍 赫秦峰 乔宁[1] 徐斌 KANG Yueqi;CHEN Anwen;ZHU Qizhen;HE Qinfeng;QIAO Ning;XU Bin(Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《水处理技术》2023年第8期77-81,共5页Technology of Water Treatment

基　　金：国家自然科学基金青年科学基金项目(51802012)。

摘　　要：以柠檬酸钠二水合物(Sodium citrate,简写SC)为改性剂,通过与Ti_(2)CT_(x)液体充分搅拌复合制备了混合胶体溶液(SC-Ti_(2)CT_(x))型吸附剂,用于处理阳离子染料亚甲基蓝(methylene blue,简称MB)废水。考察了SC的添加量、吸附时间和吸附剂用量等因素对吸附剂性能的影响,并通过动力学和吸附等温线对吸附过程进行了探索。研究结果表明:SC-Ti_(2)CT_(x)对于MB具有优异的吸附性能,在温度297 K、MB废水初始浓度为200 mg/L时,SC-Ti_(2)CT_(x)对MB吸附量可达到578.5 mg/g,其吸附过程符合准二级动力学模型,且吸附速度极快,30 s内即可达到吸附平衡。吸附过程能够用Langmuir等温模型进行拟合。吸附性能的提升与SC的抗氧化性能密切相关。A mixed colloidal solution(SC-Ti_(2)CT_(x))adsorbent was prepared using sodium citrate(SC)as a modifier and thoroughly mixed with Ti_(2)CT_(x)liquid for the treatment of the cationic dye methylene blue(MB)wastewater.The effects of the amount of SC,adsorption time and the amount of adsorbent on the properties of the adsorbent were investigated,and the adsorption process was explored by kinetics and adsorption isotherms.The results showed that SC-Ti_(2)CT_(x)had excellent adsorption performance for MB,and the adsorption capacity of SC-Ti_(2)CT_(x)for MB could reach 578.5 mg/g at a temperature of 297 K and an initial concentration of 200 mg/L of MB wastewater.The adsorption process was in accordance with the pseudo-second-order kinetic model,and the adsorption rate was extremely fast,and the adsorption equilibrium could be reached within 30 s.The adsorption process can be fitted with the Langmuir isothermal model.The improved adsorption performance is closely related to the antioxidant properties of SC.

关 键 词：染料废水 Ti_(2)CT_(x) 吸附 抗氧化剂 

分 类 号：TQ424.2[化学工程]