活性炭协同酸/碱改性粉煤灰对亚甲基蓝的吸附研究
Study on adsorption of methylene blue by activated carbon with acid/alkali synergistically modified fly ash
李巧云 1黄修行 1韦文业 1陈振2
作者信息
- 1. 广西电力职业技术学院,广西南宁 530007
- 2. 广西恒德工程检测有限公司,广西南宁 530007
- 折叠
摘要
以粉煤灰、活性炭为原材料,以氢氧化钠、氢氧化钾、磷酸、盐酸溶液分别为激发剂,利用悬浮固化法按照设计配比[m(活性炭)∶m(粉煤灰)∶m(激发剂)∶m(H2O)=3∶7∶6∶14]制备得改性粉煤灰微球.通过X射线衍射仪、扫描电子显微镜、N2吸附-脱附分析、紫外-可见分光光度计对微球进行表征,探究质量、浓度、温度、时间等因素对微球吸附染料废水中亚甲基蓝(MB)的影响.结果表明:微球具有较好的孔径、比表面积及吸附效果,其中C-NaOH-FM、C-KOH-FM、C-HCl-FM 3类微球较C-H3PO4-FM微球表现出更优异的吸附性能,C-HCl-FM微球在55℃时对MB去除率达到100%;C-KOH-FM、C-HCl-FM微球在m=0.10 g、ρ0=10 mg/L、T=25℃条件下,吸附过程遵循准二级动力学方程,平衡吸附量分别为8.93、9.07 mg/g,对MB的去除率分别为90.05%、95.36%.
Abstract
Fly ash and activated carbon were used as the raw materials.Sodium hydroxide,potassium hydroxide,phosphoric acid and hydrochloric acid solutions were used as the activators respectively.The modified fly ash microspheres were pre-pared by suspension solidification method,and the mixture was according to the design ratio m(activated carbon)∶m(fly ash)∶m(activator)∶m(H2O)=3∶7∶6∶14.The microspheres were characterized by XRD,SEM,BET and UV visible spectro-photometer.The effects of mass,concentration,temperature,time,and other factors on the adsorption of methylene blue on the microspheres were explored.The results showed that the microspheres had good pore size,good specific surface area value,and good adsorption effect.Among them,C-NaOH-FM,C-KOH-FM,and C-HCl-FM microspheres exhibited better adsorption performance than C-H3PO4-FM microspheres.At T=55℃,the removal rate of C-HCl-FM microspheres reached 100%.Under the conditions(m=0.10 g、ρ0=10 mg/L、T=25℃),the adsorption process of C-KOH-FM and C-HCl-FM mi-crospheres followed the pseudo-second-order kinetic equation,the equilibrium adsorption capacities were 8.93 mg/g and 9.07 mg/g,the removal rates were 90.05%and 95.36%.
关键词
粉煤灰/活性炭/酸碱协同改性/吸附/亚甲基蓝Key words
fly ash/activated carbon/acid/alkali synergistic modification/adsorption/methylene blue引用本文复制引用
基金项目
广西高校中青年教师科研基础能力提升项目(2023KY1360)
广西电力职业技术学院2022年度科研能力提升项目(2022KZ06)
出版年
2024
NETL
NSTL
万方数据