硼化生物炭对罗丹明B的吸附性能研究

Investigation of Adsorption of Rhodamine B by Boronized Biocarbon

主要研究硼化生物炭对水中罗丹明B(RB)的吸附性能,应用FTIR、SEM、XRD和TEM等技术对普通生物炭和硼化生物炭进行表征,分析了RB初始浓度、吸附剂的用量、pH、吸附时间和吸附温度对RB吸附性能的影响。主要结论如下:硼化生物炭具有良好的多孔结构,吸附动力学符合准二级动力学模型,等温线模型拟合发现更符合Langmuir模型。探究得到最佳的条件为pH=9、温度为308 K、在100 mL、30 mg/L的RB废液中最佳吸附剂用量为10 mg,对RB的理论最大吸附量为120.95 mg/g。

The adsorption of rhodamine B(RB)in water by boron biochar was studied.The common biochar and boron biochar were characterized by FTIR,SEM,XRD and TEM,and the effects of initial concentration of RB,dosage of adsorbent,pH,adsorption time and adsorption temperature on the adsorption of RB were analyzed.The main conclusions were as follows:boronized biochar had a good porous structure,and the adsorption kinetics conformed to the quasi-second-order kinetic model,and the isotherm model was more consistent with Langmuir model.The optimal conditions were as follows:pH=9,T=308 K,the optimal adsorbent dosage in 100 mL,30 mg/L RB waste liquid was 10 mg,and the theoretical maximum adsorption capacity for RB was 120.95 mg/g.