Fe<sub>3</sub>O<sub>4</sub>@胺甲基改性植物多酚磁絮凝收集能源微藻

赵远; 王晓宇; 刘丽君; 梁文艳

doi:10.13801/j.cnki.fhclxb.20160317.003

Fe₃O₄@胺甲基改性植物多酚磁絮凝收集能源微藻

北京林业大学环境科学与工程学院, 北京市水体污染源控制技术重点实验室, 北京 100083

基金项目: 北京林业大学科学研究项目（2015PY-08）；中央高校基本科研业务费专项资金资助项目（2015ZCQ-HJ-02）；水体污染控制与治理技术重大专项（2013ZX07209001-003）

详细信息

通讯作者:
梁文艳,博士,教授,博士生导师,研究方向为水污染控制与水资源保护,E-mail:lwy@bjfu.edu.cn

中图分类号: TQ584
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出版历程
- 收稿日期: 2016-01-07
- 修回日期: 2016-03-01
- 刊出日期: 2017-01-14

Harvesting oleagious microalgae using magnetic flocculation by Fe₃O₄@amino-methylated plant polyphenol

College of Environmental Science & Engineering, Beijing Forestry University, Beijing Key Lab for Source Control Technology of Water Pollution, Beijing 100083, China

摘要

摘要: 对落叶松植物多酚进行胺甲基化改性，将其包覆于磁性Fe₃O₄颗粒表面，制备了功能化Fe₃O₄@胺甲基改性植物多酚（Fe₃O₄@A-PP），用于能源微藻-普通小球藻的收集。采用FTIR、磁滞回线、zeta电位的方法对Fe₃O₄@A-PP磁性材料的物理化学性质进行了测定，并研究了投加方式、包覆比例对Fe₃O₄@A-PP收集微藻效能的影响。FTIR显示Fe₃O₄@A-PP具有来自A-PP的C-H、N-H和-OH等官能团。A-PP包覆对Fe₃O₄的磁性无改变。与A-PP的zeta电位相比，Fe₃O₄@A-PP的zeta电位增大了5~10 mV。Fe₃O₄@A-PP中两者配比影响微藻的收集效率，当配比为20/200时，收集率达到最大值84.2%。采用Fe₃O₄@A-PP可以将磁絮凝收集时间从A-PP的30 min缩短至0.5 min以内。显微图像显示，与A-PP絮凝后絮体呈片状松散团聚的状态相比，Fe₃O₄@A-PP收集的微藻细胞呈链状被Fe₃O₄包裹或团簇在其四周。吸附电中和在Fe₃O₄@A-PP磁絮凝收集微藻的机理中发挥重要作用。
- 植物多酚 /
- Fe₃O₄ /
- 胺甲基化改性 /
- 微藻 /
- 收集 /
- 絮凝
Abstract: The plant polyphenol was modified by amine methylation, and then coated onto Fe₃O₄ surface to obtain the functional Fe₃O₄@amine-methylated plant polyphenol (Fe₃O₄@A-PP) for harvesting the oleagious microalgae-Chlorella vulgaris. FTIR, magnetic hysteresis loop, and zeta potential of Fe₃O₄@A-PP were detected to investigate its physicochemical properties. The effects of dosing mode of Fe₃O₄@A-PP and the ratio of Fe₃O₄ to A-PP on harvesting efficiency were also studied. FTIR indicates that Fe₃O₄@A-PP has the functional groups of C-H, N-H, and -OH from A-PP. The coating of A-PP onto the Fe₃O₄ surface don't interfere the magnetic property of Fe₃O₄. Compared with A-PP, the zeta potential of Fe₃O₄@A-PP is improved by 5-10 mV. The ratio of Fe₃O₄ (g/L) to A-PP (mg/L) in Fe₃O₄@A-PP influences the harvesting efficiency obviously and the highest efficiency of 84.2% is achieved at 20/200. Fe₃O₄@A-PP can shorten the harvesting time from 30 min of A-PP to less than 0.5 min. The microscope images show that the microalgae cells are wrapped by Fe₃O₄@A-PP and form the cluster matrix or adhere around the Fe₃O₄, unlike the flaky and loose flocs or aggregates after A-PP flocculation. The mechanism of charge neutralization in the Fe₃O₄@A-PP magnetic flocculation plays an important role in microalgal harvesting.
- plant polyphenol /
- magnetite /
- amine-methylation /
- algae /
- seperation /
- flocculation

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