| 植酸改性木粉制备及其吸附性能研究 |
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| 引用本文： | 丁梦祎,任祺恺,罗婧盈,王明枝.植酸改性木粉制备及其吸附性能研究[J].北京林业大学学报,2022,44(2):131-140. |
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| 作者姓名： | 丁梦祎 任祺恺 罗婧盈 王明枝 |
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| 作者单位： | 木质材料科学与应用教育部重点实验室，北京林业大学材料科学与技术学院，北京 100083 |
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| 基金项目： | 中央高校基本科研业务费专项（2019JQ03013）； |
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| 摘 要： | 目的]将木材加工剩余物木粉和改性木粉作为废水中染料污染物的吸附剂,并探究其性能,为木粉高值化利用提供一种策略.方法]以植酸(PA)为绿色改性剂接枝木粉制备了木粉基吸附剂(PA-WF),利用SEM-EDS、ATR-FTIR、XRD、BET对PA-WF的表面形貌、元素分布、官能团、孔隙度、比表面积、结晶度和结晶结构进行...
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| 关 键 词： | 木粉 吸附 染料 接枝改性 植酸 |
| 收稿时间： | 2021-07-22 |
Preparation and adsorption property of phytic acid modified wood flour |
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| Ding Mengyi,Ren Qikai,Luo Jingying,Wang Mingzhi.Preparation and adsorption property of phytic acid modified wood flour[J].Journal of Beijing Forestry University,2022,44(2):131-140. |
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| Authors: | Ding Mengyi Ren Qikai Luo Jingying Wang Mingzhi |
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| Institution: | Key Laboratory of Wooden Material Science and Application of Ministry of Education, School of Material Science and Technology, Beijing Forestry University, Beijing 100083, China |
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| Abstract: | Objective]Exploring the performance of wood flour and modified wood flour from processing residues in the wood industry as an adsorbent for dye pollutants in wastewater provides a strategy for the high-value utilization of wood flour.Method]Wood flour-based adsorbent(PA-WF)was prepared by grafting wood flour with phytic acid(PA)as the green modifier.The surface morphology,element distribution,functional group,specific surface area,crystallinity,crystal structure and porosity of PA-WF were characterized by scanning electron microscope-EDS energy spectrum,infrared spectrum,X-ray diffractometer,and BET.The effects of mass ratio of phytic acid to wood flour,mass ratio of urea to wood flour,reaction temperature and reaction time on the grafting rate of wood flour were explored.Firstly,the effects of PA-WF grafting ratios on the adsorption capacity of methylene blue dye solution were analyzed,and the changing law of PA-WF adsorption capacity under different adsorption time and initial concentration of methylene blue dye were further explored.Result]With the mass ratio of phytic acid to wood flour was 2.5 to 5,the mass ratio of urea to wood flour was 3 to 50,the reaction temperature of 70℃,and the reaction time of 3 h,modified wood flour with a grafting rate of 11.31%can be prepared.PA was successfully grafted on the wood flour to introduce phosphate groups and increase the specific surface area,mean pore size and pore volume of wood flour,which was showed in SEM-EDS,ATR-FTIR,XRD and BET research.The adsorption test results showed that PA-WF had the best adsorption performance when the grafting rate was 8%,and the adsorption capacity was 22.53 mg/g,which was 114.57%higher than that of unmodified wood flour(10.50 mg/g).The adsorption process of the PA-WF conformed to the Langmuir adsorption isotherm equation and the quasi-second-order kinetic equation.Conclusion]We use proper conditions to prepare phytic acid grafted modified wood flour.It is speculated that the adsorption process of adsorbent belongs to ion-exchange monolayer chemical adsorption.Using the anionic phosphate group in phytic acid can greatly improve the adsorption performance of wood flour,which provides a new idea for the high-value utilization of wood flour. |
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| Keywords: | wood flour adsorption dye graft modification phytic acid |
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