Functional graphene-based magnetic nanocomposites as magnetic flocculant   for efficient harvesting of oleaginous microalgae

doi:10.1016/j.algal.2016.07.008

CORC > 北京大学 > 工学院

	Functional graphene-based magnetic nanocomposites as magnetic flocculant for efficient harvesting of oleaginous microalgae
	Liu, Pei-Rui ; Zhang, Hui-Lin ; Wang, Ting ; Yang, Wen-Long ; Hong, Yu ; Hou, Yang-Long
刊名	ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
	2016
关键词	Graphene oxide-base Cationic polymer Magnetic harvesting Adsorption Chlorella sp HQ POLY(DIALLYLDIMETHYLAMMONIUM CHLORIDE)-FUNCTIONALIZED GRAPHENE ENVIRONMENTAL APPLICATIONS MARINE MICROALGAE UV-IRRADIATION ALGAL BIOMASS CHLORELLA SP. NANOPARTICLES OXIDE WATER SAMPLES
DOI	10.1016/j.algal.2016.07.008
英文摘要	Magnetic graphene oxide (GO) nanocomposite was assigned to decorate with cationic polymer PDDA (diallyldimethylammonium chloride) to a sponge like nanocomposite GO-Fe3O4/PDDA, and employed in magnetic harvesting of oleaginous Chlorella sp. HQ. The results showed that huge surface area, lightweight and stable dispersion of GO make contribution to the high harvesting efficiency of GO-Fe3O4 (80.14%), compared to Fe3O4 NPs (62.65%) with 70 mg of nanomaterials / L of algal cells dose. In addition, graphene base provides more active sites to further decorate with PDDA, which imparts a positive zeta potential charge (21.94 mV) to nanoflocculants, thereby achieving 95.35% harvesting efficiency within 5 min. The adsorption followed Langmuir isotherm and pseudo-second-order kinetic model, with the maximum adsorption capacity of 14.06 g dry-biomass / g. Moreover, the harvesting efficiency decreased dramatically when pH increased for Fe3O4 NPs, while GO-Fe(3)O(4)and GO-Fe3O4/PDDA could maintain in a wide pH range. Besides, GO-Fe3O4/PDDA can be effectively reactivated (88.68% harvesting efficiency after 5 times reactivation) with 70 mg L-1 dose (add 30 mg L-1 after every time). It can be expected that this novel graphene-based magnetic nanocomposite has great potential to be a promising magnetic flocculant applied to efficient harvesting of oleaginous microalgae. (C) 2016 Published by Elsevier B.V.; Beijing Nova and Leading Talents Cultivation Program [Z1511000003150147]; National Natural Science Foundation of China [51571034]; SCI(E); ARTICLE; yuhong829908@gmail.com; hou@pku.edu.cn; 86-95; 19
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/458529]
专题	工学院
推荐引用方式 GB/T 7714	Liu, Pei-Rui,Zhang, Hui-Lin,Wang, Ting,et al. Functional graphene-based magnetic nanocomposites as magnetic flocculant for efficient harvesting of oleaginous microalgae[J]. ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS,2016.
APA	Liu, Pei-Rui,Zhang, Hui-Lin,Wang, Ting,Yang, Wen-Long,Hong, Yu,&Hou, Yang-Long.(2016).Functional graphene-based magnetic nanocomposites as magnetic flocculant for efficient harvesting of oleaginous microalgae.ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS.
MLA	Liu, Pei-Rui,et al."Functional graphene-based magnetic nanocomposites as magnetic flocculant for efficient harvesting of oleaginous microalgae".ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS (2016).