Mechanisms of mobility and retention of nano-TiO2 in acidic porous media in the presence of humus acids.

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室 > 海岸带信息集成与综合管理实验室

	Mechanisms of mobility and retention of nano-TiO2 in acidic porous media in the presence of humus acids.
	Zhang, Rui-Chang 2,3; Zhang, Hai-Bo 1; Tu, Chen 1; Luo, Yong-Ming 2
刊名	Zhongguo Huanjing Kexue/China Environmental Science
	2018-09-20
卷号	38 期号:9 页码:3542-3551
关键词	Convergence of numerical methods Nanoparticles Organic acids Oxides Porous materials Quartz Sodium chloride Soils Titanium dioxide
ISSN号	1000-6923
其他题名	腐殖酸作用下酸性多孔介质中纳米TiO2的迁移与滞留机制
产权排序	(1) Chemical Engineering and Pharmaceutics School, Henan University of Science and Technology, Luoyang ; 471023, China ; (2) Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai ; 264003, China ; (3) Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing ; 210008, China
文献子类	article
英文摘要	The mechanisms of mobility and retention of titanium dioxide nanoparticles (nTiO2) in well-defined porous media composed of clean quartz sand in the presence of fulvic acid (FA) and humic acid (HA) were studied under acidic conditions. nTiO2 were immobile in the porous media in the absence of FA and HA at pH 4.0. FA and HA could be adsorbed onto the surface of nTiO2, change the electrokinetic properties of nTiO2, and facilitate the transport of nTiO2. The elution of nTiO2 increased from 0.01 and 0.88 to 0.91 and 0.94 with the increase of FA and HA from 1mg/L to 10mg/L respectively. Compared to FA, more HA was adsorbed onto nTiO2, and thus the facilitated effect of HA on transport of nTiO2 was stronger. Ions inhibited the mobility of nTiO2, and the effect of CaCl2 was greater than that of NaCl in same concentration. The mobility of nTiO2 was better in the presence of HA than FA. In addition, 7%~56% nTiO2 was deposited in the secondary energy minimum well in the presence of HA, higher than 4%~17% in the presence of FA, which could be easily released when the environmental conditions changed. High energy barriers between nTiO2 and quartz promoted the mobility of nTiO2, while a combination of the secondary minimum energy, straining, diffusion and gravitational deposition were involved in the retention of nTiO2. © 2018, Editorial Board of China Environmental Science. All right reserved.
WOS研究方向	Minerals
语种	中文
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/25216]
专题	烟台海岸带研究所_海岸带信息集成与综合管理实验室烟台海岸带研究所_污染过程与控制实验室烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
作者单位	1.Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai; 264003, China; 2.Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing; 210008, China 3.Chemical Engineering and Pharmaceutics School, Henan University of Science and Technology, Luoyang; 471023, China;
推荐引用方式 GB/T 7714	Zhang, Rui-Chang,Zhang, Hai-Bo,Tu, Chen,et al. Mechanisms of mobility and retention of nano-TiO2 in acidic porous media in the presence of humus acids.[J]. Zhongguo Huanjing Kexue/China Environmental Science,2018,38(9):3542-3551.
APA	Zhang, Rui-Chang,Zhang, Hai-Bo,Tu, Chen,&Luo, Yong-Ming.(2018).Mechanisms of mobility and retention of nano-TiO2 in acidic porous media in the presence of humus acids..Zhongguo Huanjing Kexue/China Environmental Science,38(9),3542-3551.
MLA	Zhang, Rui-Chang,et al."Mechanisms of mobility and retention of nano-TiO2 in acidic porous media in the presence of humus acids.".Zhongguo Huanjing Kexue/China Environmental Science 38.9(2018):3542-3551.