摘要
采用廉价易得的海泡石作为吸附剂,对其进行多巴胺改性和磁改性,制备了PDA@SeP/Fe_(3)O_(4)复合材料,利用FT-IR、XRD、SEM对吸附剂进行了结构表征。实验考察了复合材料对亚甲基蓝的吸附性,结果表明:改性后的海泡石材料表面成功负载了多巴胺及Fe_(3)O_(4);PDA@SeP/Fe_(3)O_(4)复合材料具有良好的吸附性及再生性能,在吸附时间3 h、45℃、pH=10条件下,该复合材料对亚甲基蓝能达到最好的去除效果,吸附量可达749.14 mg/g;PDA@SeP/Fe_(3)O_(4)复合材料对亚甲基蓝的吸附符合Langmuir模型,为自发的吸热过程,吸附焓变与熵变分别为7.033 kJ/mol和35.514 J/(mol·K),吸附行为遵循准二级动力学方程。
Using cheap and easily available sepiolite as the adsorbent,it was modified by dopamine and magnetically modified to prepare PDA@SeP/Fe_(3)O_(4)composite material,and the structure of the adsorbent was characterized by FT-IR,XRD and SEM.The experiment investigated the adsorption of the composite material to MB,and the results showed that the surface of the modified sepiolite material was successfully loaded with dopamine and Fe_(3)O_(4).PDA@SeP/Fe_(3)O_(4)composite material has good adsorption and regeneration performance.Under the conditions of 3 h,45℃and pH=10,the composite material can achieve the best removal effect on MB,and the adsorption capacity can reach 749.14 mg/g.The adsorption of MB on the PDA@SeP/Fe_(3)O_(4)composite material conforms to the Langmuir model,which is a spontaneous endothermic process,the adsorption enthalpy becomes 7.033 kJ/mol,the entropy becomes 35.514 J/(mol·K),and the adsorption behavior follows the quasi-second-order kinetic equation.
作者
刘莹
毛增玥
王梓颖
和艳阳
余晶
朱晔
Liu Ying;Mao Zengyue;Wang Ziying;He Yanyang;Yu Jing;Zhu Ye(Southwest Petroleum University,Chengdu 610500,Sichuan,China)
出处
《精细石油化工》
CAS
2021年第2期50-56,共7页
Speciality Petrochemicals
基金
西南石油大学课外开放实验校级重点项目(KSZ18404)。
关键词
海泡石
多巴胺
四氧化三铁
吸附
亚甲基蓝
sepiolite
dopamine
ferroferric oxide
adsorption
methylene blue
