高比表面多孔碳酸钙用于高效吸附结晶紫研究
Efficiency adsorption of crystal violet with high specific surface porous calcium carbonate
陈燕萌 1龙紫祺 1杨鹏飞 1玉澜 1陆丽金 1兰兴先1
作者信息
- 1. 广西科技师范学院 食品与生化工程学院,广西 来宾 546199
- 折叠
摘要
以石灰石为原料,采用碳化法+模板法制备石灰石基多孔碳酸钙,所得碳酸钙颗粒表面粗糙,呈孔状结构,比表面积高达60.17 m2·g-1.该多孔碳酸钙对结晶紫的吸附实验结果显示,多孔碳酸钙对结晶紫的吸附去除率达到93.36％、吸附量816.89 mg·g-1.多孔碳酸钙吸附结晶紫前后的红外光谱图表明结晶紫成功被吸附在多孔碳酸钙上.采用等温吸附模型拟合发现,多孔碳酸钙吸附结晶紫过程遵循Langmuir模型,属于非均匀的单分子层吸附.同时,动力学拟合与准二级吸附模型吻合,表明吸附过程以化学吸附为主.
Abstract
Limestone-based porous calcium carbonate with had rough surface,porous structure,and high specific surface area up to 60.17 m2·g-1 was prepared by carbonization method and template strategy using limestone as raw material.The adsorption per-formances of the obtained porous calcium carbonate were carried out to remove crystal violet,which shows an excellent removal rate of 93.36％with a high adsorption capacity of 816.89 mg·g-1.The result of infrared spectra of porous calcium carbonate before and after adsorption of crystal violet confirmed that crystal violet has been successfully adsorbed onto the porous calcium carbonate.The fitting curves of isothermal adsorption model means the adsorption process of crystal violet by porous calcium carbonate following the Langmuir model,belonging to the non-uniform single molecular layer adsorption.Meanwhile,the kinetic fitting meets with the quasi-second-order adsorption model,indicating a dominated adsorption process by chemisorption.
关键词
结晶紫/吸附/多孔碳酸钙/高比表面积Key words
crystal violet/adsorption/porous calcium carbonate/high specific surface area引用本文复制引用
基金项目
广西无机材料绿色制备与应用重点实验室项目(桂科AD20297139)
来宾市科学研究与技术开发计划(来科转220904)
来宾市科学研究与技术开发计划(来科能202408)
广西科技师范学院科研项目(GXKS2023ZDB009)
出版年
2024
NETL
NSTL
万方数据