磁性茶渣的制备及其对Cr(Ⅵ)吸附性能的研究  

Preparation of Magnetic Tea Waste and Its Adsorption Properties on Cr(Ⅵ)

作　　者：胡芳[1] 张顺宝 谭嘉琪 史长伟[1] 郑顺姬[1] HU Fang;ZHANG Shunbao;TAN Jiaqi;SHI Changwei;ZHENG Shunji(College of Light Industry&Textile Engineering,Qiqihar University,Qiqihar 161005,China)

机构地区：[1]齐齐哈尔大学轻工与纺织学院,黑龙江齐齐哈尔161005

出　　处：《水处理技术》2024年第7期55-59,共5页Technology of Water Treatment

基　　金：黑龙江省省属本科高校基本科研业务费科研项目(145209140)。

摘　　要：采用化学交联法在废茶渣(TW)上负载Fe_(3)O_(4)磁性粒子,制备了新型生物质基磁性吸附剂-磁性茶渣(MTW),利用SEM和FTIR进行了表征,并研究了MTW对于水溶液中Cr(Ⅵ)的吸附性能。在30℃、pH为2、吸附剂用量1 g/L、吸附时间120 min时,MTW对初始浓度为20 mg/L的Cr(Ⅵ)的吸附率为91%。Cr(Ⅵ)在MTW上的吸附符合Langmuir等温线模型和准二级动力学模型,在40℃下,最大吸附容量为33.847 mg/g。热力学参数表明,吸附是自发和吸热的。A novel biomass-based magnetic adsorbent,magnetic tea waste(MTW)was prepared by loading Fe_(3)O_(4)magnetic particles onto tea waste(TW)using the chemical crosslinking method.The adsorbent was characterized by SEM and FTIR,and the adsorption properties of MTW on Cr(Ⅵ)from aqueous solution were studied.At 30℃,pH=2,adsorbent dosage of 1 g/L,and adsorption time of 120 min,the adsorption rate of 20 mg/L Cr(Ⅵ)on the MTW was 91%.The adsorption of Cr(Ⅵ)by MTW conforms to the Langmuir isotherm model and quasi-second-order kinetic model.At 40℃,the maximum adsorption capacity is 33.847 mg/g.Thermodynamic parameters showed that the adsorption of Cr(Ⅵ)by MTW is spontaneous and endothermic.

关 键 词：吸附 茶渣 Fe_(3)O_(4) CR(VI) 

分 类 号：TQ424.3[化学工程]