欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
以甘薯渣作为材料,针对亚甲基蓝溶液初始浓度、溶液pH、改性甘薯渣加入量、吸附温度、吸附时间各因素对吸附率的影响进行实验,进一步对影响显著的初始浓度、加入量、时间采用二次正交旋转组合设计优化,得到浓度80 mg·L^-1、加入量1.0 g、时间1 h时预测最大吸附率96.25%,实测95.89%,二者吻合。改性甘薯渣对亚甲基蓝吸附过程符合Freundlich等温式及准二级动力学模型,说明其吸附过程由化学速率控制的多位点物理化学混合吸附。据Langmuir等温式计算饱和吸附量为20.16 mg·g-1。SEM观测得知改性甘薯渣处理后疏松多孔的表面有利于吸附。经FTIR可知,羟基、羧基在吸附过程中有主要作用。
英文摘要：
Sweet potato residue was used as an absorbent for methylene blue. The effects of various factors such as the initial concentration and p H of the methylene blue solution,quantity of modified sweet potato residue added to the solution,particle size,temperature,and time on the absorption rate were evaluated. Quadratic regression rotation combination design was adopted to evaluate the initial concentration,quantity,and time. A maximum adsorption rate of 96. 25% was achieved when the concentration of methylene blue solution was 80 mg·L^-1,the quantity of sweet potato residue added was 1. 0 g,and the reaction time was 1 h. The adsorption reaction rate was 95. 89% under this condition,where the two results were identical. The adsorption of methylene blue by modified sweet potato residue complies with the Freundlich isotherm and quasi-second order dynamic model,which indicated that the adsorption was a multisite physical and chemical mixed adsorption,mainly controlled by the chemical reaction rate. According to the Langmuir equation,the maximum adsorption capacity of the modified sweet potato residue for methylene blue was 20. 16 mg·g- 1. Scanning electron microscopy illustrated that the porous surface of the modified sweet potato residue facilitated the adsorption,and Fourier transform infrared data indicated that —OH and COO— played major roles in the adsorption process.
同期刊论文项目
同项目期刊论文
期刊信息
位置：