Influence of graphene oxide on the transport and deposition behaviors of   colloids in saturated porous media

doi:10.1016/j.envpol.2017.03.064

CORC > 北京大学 > 环境科学与工程学院

	Influence of graphene oxide on the transport and deposition behaviors of colloids in saturated porous media
	Peng, Shengnan ; Wu, Dan ; Ge, Zhi ; Tong, Meiping ; Kim, Hyunjung
刊名	ENVIRONMENTAL POLLUTION
	2017
关键词	Colloid transport Graphene oxide Adsorption Cotransport Quartz sand TITANIUM-DIOXIDE NANOPARTICLES WALLED CARBON NANOTUBES QUARTZ SAND SOLUTION CHEMISTRY CONTAMINANT TRANSPORT SUBSURFACE TRANSPORT CLAY PARTICLES ORGANIC-MATTER COATED SAND HUMIC-ACID
DOI	10.1016/j.envpol.2017.03.064
英文摘要	The effects of graphene oxide (GO) on the transport and deposition behaviors of colloids with different sizes in packed quartz sand were investigated in both NaCI (10 and 50 mM) and CaCl2 solutions (1 and 5 mM) at pH 6. Fluorescent carboxylate-modified polystyrene latex microspheres (CMLs) with size ranging from 0.2 to 2 gm were utilized as model colloids. Both breakthrough curves and retained profiles of colloids in the presence and absence of GO in suspensions under all examined solution conditions were analyzed. The breakthrough curves of all three different-sized CMLs with GO were higher yet the retained profiles were lower than those without GO at both examined ionic strengths in NaCl solutions. The observation showed that GO increased the transport and decreased the deposition of all three different-sized CMLs in NaCI solutions. However, in CaCl2 solutions, opposite observation was achieved at two different ionic strength conditions. Specifically, the presence of GO increased the transport and decreased the deposition of all three different-sized CMLs in 1 mM CaCl2 solutions, whereas, it decreased the transport and increased the deposition of all three different-sized CMLs in 5 mM CaCl2 solutions. Comparison the breakthrough curves and retained profiles of CMLs versus those of GO yielded that the overall transport and deposition behaviors of all three different-sized CMLs with GO copresent in suspensions agreed well with the transport and deposition behaviors of GO under all examined conditions. The transport and deposition behaviors of CMLs in packed porous media clearly were controlled by those of GO under the conditions investigated in present study due to the adsorption of CMLs onto GO surfaces. Our study showed that once released into natural environment, GO would adsorb (interact with) different types of colloids and thus have significant influence on the fate and transport of colloids in porous media. (C) 2017 Published by Elsevier Ltd.; National Natural Science Foundation of China [41422106, 21377006]; program for New Century Excellent Talents in University [NCET-13-0010]; SCI(E); ARTICLE; 141-149; 225
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/473195]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Peng, Shengnan,Wu, Dan,Ge, Zhi,et al. Influence of graphene oxide on the transport and deposition behaviors of colloids in saturated porous media[J]. ENVIRONMENTAL POLLUTION,2017.
APA	Peng, Shengnan,Wu, Dan,Ge, Zhi,Tong, Meiping,&Kim, Hyunjung.(2017).Influence of graphene oxide on the transport and deposition behaviors of colloids in saturated porous media.ENVIRONMENTAL POLLUTION.
MLA	Peng, Shengnan,et al."Influence of graphene oxide on the transport and deposition behaviors of colloids in saturated porous media".ENVIRONMENTAL POLLUTION (2017).