摘要
为获得对Cu^(2+)具有良好吸附性能的吸附材料,采用戊二醛化学交联氨基硫脲并与竹浆纤维素进行反应,制备纤维素-氨基硫脲吸附材料(Bamboo pulp cellulose-g-thiosemicarbazide, BPC-g-TSC)。利用场发射扫描电子显微镜(FE-SEM)、傅立叶红外吸收光谱(FT-IR)仪和有机元素分析仪对竹浆纤维素和BPC-g-TSC进行表征分析,并研究了不同条件(pH值、接触时间、Cu^(2+)初始浓度等)对Cu^(2+)吸附性能的影响。结果表明:纤维素被氨基硫脲成功修饰;BPC-g-TSC对Cu^(2+)的吸附最佳pH值为7,在吸附4 h后基本达到吸附平衡,平衡吸附量为51.40 mg/g;吸附过程较好地符合准二级动力学模型和朗格缪尔等温吸附模型,说明吸附过程主要是以单层的表面吸附和化学吸附为主,理论最大吸附容量为121.95 mg/g。通过该研究可制备出一种对Cu^(2+)具有良好吸附性能的吸附材料,在废水处理领域具有潜在的应用前景。
In order to obtain adsorption materials with good adsorption property for Cu2+, Bamboo pulp cellulose-g-thiosemicarbazide(BPC-g-TSC) was prepared by chemically cross-linking cellulose and thiosemicarbazide with glutaraldehyde. BPC-g-TSC was characterized by Field-emission scanning electron microscopy(FE-SEM), Fourier transform infrared spectroscopy(FT-IR) and organic elemental analyzer. The influence of different conditions(pH, contact time, the initial concentration of Cu2+, etc.) on the adsorption of Cu2+ was further investigated. The results showed that cellulose was successfully modified by thiosemicarbazide, the optimum pH of BPC-g-TSC for Cu2+ adsorption was 7, and the adsorption equilibrium was basically reached after 4 h.The equilibrium adsorption capacity was 51.40 mg/g. The adsorption process was in good agreement with the Pseudo-second-order kinetic model and the Langmuir isotherm model, which indicated that the adsorption process is mainly single-layer surface adsorption and chemical absorption. The theoretical maximum adsorption capacity is 121.95 mg/g. An adsorption material with good adsorption performance for Cu2+ can be prepared by this study, which has potential application prospects in the field of wastewater treatment.
作者
谈学松
范志磊
张勇
TAN Xuesong;FAN Zhilei;ZHANG Yong(Silk Institute,College of Materials and Textiles,Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《浙江理工大学学报（自然科学版）》
2019年第2期154-159,共6页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
国家自然科学基金面上项目(61571002)
浙江省公益技术应用研究项目(2017C31034)
关键词
纤维素
氨基硫脲
交联
吸附
CU2+
cellulose
thiosemicarbazide
cross-linking
adsorption
Cu2+
作者简介
谈学松(1992-),男,湖北鄂州人,硕士研究生,主要从事生物基水处理材料方面的研究;通信作者:张勇,E-mail:zhangyong@zstu.edu.cn
