纳米二氧化钛负载水葫芦基生物炭的制备及其对亚甲基蓝的吸附性能研究  

Preparation of nano titanium dioxide loaded water hyacinth biochar and its adsorption performance of methylene blue

作　　者：孟文超 欧阳泽 郭园萍 赵梦轩 余军霞 池汝安 MENG Wenchao;OUYANG Ze;GUO Yuanping;ZHAO Mengxuan;YU Junxia;CHI Ruan(School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Wuhan 430074,China)

机构地区：[1]武汉工程大学化学与环境工程学院,湖北武汉430074

出　　处：《贵州科学》2023年第3期52-58,共7页Guizhou Science

基　　金：国家自然科学基金面上项目(No.21978226);湖北省教育厅创新团队项目(No.T201506)。

摘　　要：通过原位沉淀法制备了二氧化钛负载水葫芦基生物炭吸附剂,并探讨了浓度、吸附时间、酸度、共存离子等因素对其吸附亚甲基蓝的影响以及吸附剂的降解循环再生性能。FTIR和EDS分析结果表明,纳米二氧化钛成功负载在生物炭表面,所制备的Ti/WHBC-3.0对亚甲基蓝的吸附符合Langmuir模型,最大吸附容量为97.5 mg·g^(-1),吸附为快速吸附过程,可在15 min内完成,符合准二级动力学模型。降解循环再生实验结果表明,二氧化钛负载水葫芦基生物炭具有良好的循环使用性,在5次循环实验后依然保持90%的吸附活性,可望用于染料废水的处理。Titanium dioxide loaded biochar derived from water hyacinth was prepared by in situ precipitation method.The effect of concentration,adsorption time,acidity and coexisting ions on the adsorption of methylene blue and the recycling performance of the adsorbent were investigated.The results of FTIR and EDS analysis indicated that nano titanium dioxide was successfully loaded on the biochar.The adsorption of methylene blue on Ti/WHBC-3.0 was consistent with the Langmuir model,and the maximum adsorption capacity was 97.5 mg/g.The adsorption was a fast adsorption process,which was completed within 15 minutes and well interpreted by the pseudo-second-order kinetic model.The results of degradation recycling experiments showed that the nano titanium dioxide loaded biochar derived from water hyacinth had good recycling ability and maintained 90%of its adsorption activity after being used for five times.The biochar can be used in the treatment of dye wastewater.

关 键 词：原位沉淀 生物炭 吸附 亚甲基蓝 纳米二氧化钛 

分 类 号：X788[环境科学与工程—环境工程]