锰铁氧体/生物炭的制备及其对Pb^(2+)吸附性能的研究  

Synthesis of biochar loaded with manganese ferrite and their performance for Pb^(2+) removal

作　　者：王耀[1,2] 段正洋 石康伟 刘树丽 徐龙乾[1] 何昌华 黄启华[1] 徐晓军[1] Wang Yao;Duan Zhengyang;Shi Kangwei;Liu Shuli;Xu Longqian;He Changhua;Huang Qihua;Xu Xiaojun(Faculty of Environmental Science and Technology,Kunming University o{Science and Technology,Kunming 650500;Geological Party No.224,Sino Shaanxi Nuclear Industry Group, Xi'an 710024)

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650500 [2]中陕核工业集团二二四大队有限公司,西安710024

出　　处：《化工新型材料》2018年第12期209-213,共5页New Chemical Materials

摘　　要：利用水热法合成了锰铁氧体/生物炭吸附材料(FBC),用于去除溶液中Pb^(2+)离子。通过傅里叶变换红外光谱仪对吸附前后FBC进行表征分析,研究了溶液初始pH、溶液初始质量浓度、吸附时间等对Pb^(2+)离子吸附的影响,探讨了吸附动力学特性和吸附等温线特性。结果表明:温度为25℃,FBC吸附Pb^(2+)离子在120min内即可达到吸附平衡,最大吸附量为126.1mg/g;吸附过程符合准二级动力学方程和Langmuir等温吸附方程,说明FBC对Pb^(2+)离子的吸附过程主要是单分子层化学吸附。再生吸附实验结果显示,重复利用5次后,FBC对Pb^(2+)离子的吸附量超过70mg/g,表现出良好的再生性能。Biochar loaded with manganese ferrite（FBC）was prepared by hydrothermal synthesis,and applied in Pb2+removal from synthetic wastewater.The product was characterized by fourier tansform infrared（FT-IR）.Effect factors,such as pH,initial concentration of Pb2+,contact time and adsorption kinetics,adsorption isotherms on FBC adsorption for Pb2+ were investigated.The adsorption equilibrium of Pb2+ was achieved after 120 min at 25℃,and the maximum adsorption capacity was 126.1 mg/g.The adsorption process which followed the pseudo-second-order kinetics and Langmuir isotherm equation showed that monomolecular chemisorption played dominant role in Pb2+ adsorption.The desorption result indicated that the adsorption capacities of FBC could still reach up to 70 mg/g by five repetition tests.

关 键 词：锰铁氧体 生物炭 吸附动力学 吸附等温线 含铅废水 

分 类 号：O647.3[理学—物理化学]