Long-chain poly-arginine functionalized porous Fe3O4 microspheres as magnetic flocculant for efficient harvesting of oleaginous microalgae
作者： Pei-Rui Liu , Ting Wang , Zi-Yu Yang , Yu Hong , Yang-Long Hou
DOI: 10.1016/J.ALGAL.2017.08.025
关键词: Hydrogen bond 、 Chemical engineering 、 Porosity 、 Chlorella 、 Chromatography 、 Chemistry 、 Microsphere 、 Flocculation 、 Poly arginine 、 Molecular mass 、 Adsorption
摘要: Abstract Considering the porous characteristics of magnetic Fe3O4 microspheres, this study aims to utilize long-chain poly-arginine (PA) obtain PA-modified microspheres (p-Fe3O4@PA). The possessed a loose structure on surface, and average pore size was 224.2 A. harvesting efficiency for Chlorella sp. HQ improved markedly compared with that p-Fe3O4 after modification three PAs different molecular weights. p-Fe3O4@PA-2 (PA weight: 15,000–70,000) had best performance decreasing dosage from 300 mg L− 1 10 mg L− 1. results indicated PA at higher weight could promote microalgae adsorption, whereas an excessively high (> 70,000) not conducive harvesting. percentage p-Fe3O4@PA (57.9%) provided abundant adsorption media active sites adsorption. Bridging flocculation hydrogen bonding between greatly enhanced efficiency. In addition, maintain good cycling stability because relatively large microspheres.
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