摘要
利用Hummers法制备氧化石墨烯,再将纤维素和氧化石墨烯在超声环境下进行合成来制备复合材料,利用红外光谱(FIIR)、扫描电镜(SEM)和X射线衍射(XRD)对其结构和形貌进行表征。根据吸附剂投加量、pH、时间、温度、初始浓度等影响因素进行正交实验。结果表明,复合材料对Pb^2+的去除率为93.25%,可以作为一种优良的吸附剂对水中Pb^2+进行有效处理。吸附过程可以用Freundlich吸附等温式描述,其相关的系数R2为0.948 9,最大吸附容量为203.93 mg/g。重复使用5次后,纤维素/氧化石墨烯复合材料对水中Pb2+的去除率仍在85%以上,表现出了良好的重复使用性。
The cellulose and graphene oxide were synthesized to prepare composite in ultrasonic condition,thegraphene oxidewas produced by Hummers method. The structure and morphology ofcomposite were characterized by Fourier transform infrared spectroscopy (FIIR), scanning electron microscopy (SEM) and X ray diffraction (XRD). Orthogonal experiments were carried with the factors such as dosage of adsorbent, pH, time, temperature and initial concentration. The results showed that the removal rate of Pb^2+ by composite was 93.25%, so the compositecould be used as an excellent adsorbent to removePb^2+ effectively in water.The adsorption process could be described by Freundlich adsorption isotherm with a correlation coefficient of R^2 of 0.948 9 and a maximum adsorption capacity of 203.93 mg/g. After repeated use for 5 times, the removal rate of Pb2+ in water by cellulose/graphene oxide composites was still above 85%, showing good reusability.
作者
谢敏
熊锋培
冯传禄
韩娟娟
吴鑫
XIE Min;XIONG Fengpei;FENG Chuanlu;HAN Juanjuan;WU Xin(School of Hydraulic Engineering,Changsha University of Science&Technology;Hunan Provincial Key Laboratory of Waler and Sediment Science and Water Disaster Prevention;Engineering and Technical center of Hunan Provincial Environmental Protection for River-Lake Dredging Pollution Control;Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province,Changsha 410114,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2019年第8期67-70,共4页
Technology of Water Treatment
基金
国家自然科学基金（51108043,51109016）
湖南省教育厅项目（13C1024）
长沙市能源局项目（[2016]46）
湖南省自然科学基金项目（2019JJ50672）
