| F-127改性纳米零价铁及对水中2,4-DCP的去除 |
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| 引用本文： | 张永祥,李雅君,井琦,王晋昊,郭汶俊.F-127改性纳米零价铁及对水中2,4-DCP的去除[J].环境科学学报,2019,39(8):2559-2566. |
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| 作者姓名： | 张永祥 李雅君 井琦 王晋昊 郭汶俊 |
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| 作者单位： | 北京工业大学建筑工程学院,水质科学与水环境恢复工程北京市重点实验室,北京100124;北京工业大学建筑工程学院,水质科学与水环境恢复工程北京市重点实验室,北京100124;北京工业大学建筑工程学院,水质科学与水环境恢复工程北京市重点实验室,北京100124;北京工业大学建筑工程学院,水质科学与水环境恢复工程北京市重点实验室,北京100124;北京工业大学建筑工程学院,水质科学与水环境恢复工程北京市重点实验室,北京100124 |
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| 基金项目： | 北京市科委项目（No.Z161100004516015）；国家重点研发计划（No.2016YFC0401404） |
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| 摘 要： | 为了增强纳米零价铁的分散性,本研究采用环境友好型材料Pluronic F-127对纳米零价铁(NZVI)进行表面改性,形成分散型纳米零价铁(F-NZVI),并用于水中2,4-DCP的去除.通过不同质量比的F-NZVI颗粒沉降试验和对2,4-DCP的去除试验,发现存在沉降去除和悬浮去除两个阶段,确定F-127与NZVI颗粒的最佳质量比为2∶1,2,4-DCP最大去除率为72.32%.通过SEM、FTIR、XRD、XPS对样品进行表面形貌、组成和晶体结构分析,发现F-127对提高NZVI分散性和抗氧化性有显著作用.通过控制不同因素研究F-NZVI去除水中2,4-DCP的最优条件,实验结果表明,当2,4-DCP初始浓度为20 mg·L~(-1)时,F-NZVI去除2,4-DCP的最佳pH值为5,F-NZVI最佳投加量为3 g·L~(-1).
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| 关 键 词： | Pluronic F-127 分散性 2 4-DCP 去除 |
| 收稿时间： | 2019/1/5 0:00:00 |
| 修稿时间： | 2019/3/26 0:00:00 |
Modified nano zero-valent iron by F-127 and its application in removal of 2,4-dichlorophenol in water |
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| ZHANG Yongxiang,LI Yajun,JING Qi,WANG Jinhao and GUO Wenjun.Modified nano zero-valent iron by F-127 and its application in removal of 2,4-dichlorophenol in water[J].Acta Scientiae Circumstantiae,2019,39(8):2559-2566. |
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| Authors: | ZHANG Yongxiang LI Yajun JING Qi WANG Jinhao and GUO Wenjun |
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| Institution: | Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124,Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124,Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124,Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124 and Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124 |
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| Abstract: | To enhance the dispersivity of nano zero-valent iron (NZVI) used for removing 2,4-DCP from water, the surfaces of NZVI was modified with F-127 as an environmentally friendly organic stabilizer. Based on different mass ratio of F-NZVI particles sedimentation experiment and 2,4-DCP removal experiment,two-stage process (sedimentation removal and suspension removal) was found. The optimum mass ratio of F-127 to NZVI particles was found to be 2:1 and the maximum removal efficiency was 72.32%. The surface morphology, composition and crystal structure of the samples were analysed by using scanning electron microscope (SEM), Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. Results show that F-127 significantly improved NZVI dispersibility and oxidation resistance. Final,the main factors of F-NZVI for the removal 2,4-DCP in water were studied to find the optimal 2,4-DCP removal condition, which were pH=5, 3 g·L-1 F-NZVI for 20 mg·L-1 of 2,4-DCP. |
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| Keywords: | pluronic F-127 fragmentation 2 4-dichlorophenol removal |
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