生物炭复合高吸水树脂吸附亚甲基蓝性能研究  

Adsorption performance of methylene blue by biochar composite superabsorbent

作　　者：揭伟伟 林鑫晨 邓文勇 刘倩[1] 刘光斌 胡秀霞[1] 龚磊[1,2] JIE Wei-wei;LIN Xin-chen;DENG Wen-yong;LIU Qian;LIU Guang-bin;HU Xiu-xia;GONG Lei(Department of Chemistry,Jiangxi Agricultural University,Nanchang 330045,China;Key Laboratory of Chemical Utilization of Plant Resources of Nanchang,Nanchang 330045,China)

机构地区：[1]江西农业大学化学系,江西南昌330045 [2]南昌市植物资源化学利用重点实验室,江西南昌330045

出　　处：《应用化工》2021年第12期3325-3328,3332,共5页Applied Chemical Industry

基　　金：国家自然科学基金项目资助(21563014);江西省教育厅科学技术研究项目资助(GJJ160381)。

摘　　要：研究了pH值、MB初始浓度、温度及吸附时间对生物炭接枝聚丙烯酸/丙烯酰胺复合树脂(BC-SA)亚甲基蓝(MB)吸附量的影响,对MB吸附过程进行了吸附等温线和动力学方程拟合,并采用SEM和FTIR对吸附MB前后的BC-SA进行了表征,探讨了BC-SA吸附MB机理。结果表明,BC-SA吸附MB的适用pH范围较宽,为3~10;MB的初始浓度为2500 mg/L时,吸附量最大,可达1748.5 mg/g;30~50℃范围内,温度对吸附量影响不大;BC-SA吸附MB符合Langmuir方程和准二级动力学方程;BC-SA孔隙结构丰富,含有大量的羟基、羧基和酰胺基等官能团结构,可通过氢键、静电作用及离子交换等方式对MB进行吸附。The effect of pH,initial concentrations,temperature and contact time of MB on adsorption capacity of BC-SA was investigated.The adsorption process was fitted by adsorption isotherms and kinetic equations.BC-SA before and after absorbing MB were characterized by SEM and FTIR,the adsorption mechanisms were proposed.The results show the suitable pH range for MB adsorption by BC-SA is 3~10.The MB adsorption capacity for BC-SA in 2500 mg/L solution is the highest,reaching to 1748.5 mg/g.Temperature has little effect on adsorption capacity in the range of 30~50℃.The adsorption of BC-SA for MB is more consistent with Langmuir equation and pseudo-second-order kinetic equation.BC-SA possesses rich pore structure and has lots of functional groups of—OH,—COOH and—CONH,which adsorb MB by hydrogen bonding,electrostatic attraction and ion exchange.

关 键 词：生物炭 高吸水树脂 亚甲基蓝 

分 类 号：TQ424.3[化学工程]